GE
Data Sheet
March 20, 2019 ©2016 General Electric Company. All rights reserved.
3A Digital PicoDLynx
TM
: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 3A Output Current
Features
Compliant to RoHS II EU “Directive 2011/65/EU”
Compatible in a Pb-free or SnPb reflow environment
Compliant to IPC-9592 (September 2008), Category 2,
Class II
Use ABB specified module version and process for SMT
placement on bottom side of board (-D version only)
DOSA based
Wide Input voltage range (3Vdc-14.4Vdc)
Output voltage programmable from 0.6Vdc to 5.5Vdc via
external resistor. Digitally adjustable down to 0.45Vdc
Digital interface through the PMBus
TM #
protocol
Tunable Loop
TM
to optimize dynamic output voltage
response
Flexible output voltage sequencing EZ-SEQUENCE
Power Good signal
Fixed switching frequency with capability of external
synchronization
Output overcurrent protection (non-latching)
Over temperature protection
Remote On/Off
Ability to sink and source current
Cost efficient open frame design
Small size: 12.2 mm x 12.2 mm x 6.25 mm
(0.48 in x 0.48 in x 0.246 in)
Wide operating temperature range [-40°C to 105°C
(Ruggedized: -D), 85°C(Regular)]
UL* 60950-1Recognized, CSA
†
C22.2 No. 60950-1-03
Certified, and VDE
‡
0805:2001-12 (EN60950-1) Licensed
ISO** 9001 and ISO 14001 certified manufacturing
facilities
Applications
Industrial equipment
Distributed power architectures
Intermediate bus voltage applications
Telecommunications equipment
Description
The 3A Digital PicoDLynx
TM
power modules are non-isolated dc-dc converters that can deliver up to 3A of output current. These
modules operate over a wide range of input voltage (V
IN
= 3Vdc-14.4Vdc) and provide a precisely regulated output voltage from
0.45Vdc to 5.5Vdc, programmable via an external resistor and PMBus control. Features include a digital interface using the PMBus
protocol, remote On/Off, adjustable output voltage, over current and over temperature protection. The PMBus interface supports a
range of commands to both control and monitor the module. The module also includes the Tunable Loop
TM
feature that allows the
user to optimize the dynamic response of the converter to match the load with reduced amount of output capacitance leading to
savings on cost and PWB area.
*
UL is a registered trademark of Underwriters Laboratories, Inc.
†
CSA is a registered trademark of Canadian Standards Association.
‡
VDE is a trademark of Verband Deutscher Elektrotechniker e.V.
** ISO is a registered trademark of the International Organization of Standards
#
The PMBus name and logo are registered trademarks of the System Management Interface Forum (SMIF)
TRIM
VOUT
VS+
GND
RTUNE
CTUNE
RTrim
VIN
Co
Cin
Vout+Vin+
ON/OFF
SEQ
MODULE
PGOOD
SMBALRT#
SIG_GND
A
DDR1
RADDR0
CLK
DATA
A
DDR0
VS-
RADDR1
GND
SYNC
RoHS Co m
p
liant
GE Data Sheet
3A Di
g
ital PicoDL
y
nxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 3A Output Current
March 20, 2019 ©2016 General Electric Company. All rights reserved. Page 2
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are absolute stress ratings
only, functional operation of the device is not implied at these or any other conditions in excess of those given in the operations
sections of the data sheet. Exposure to absolute maximum ratings for extended periods can adversely affect the device reliability.
Parameter Device Symbol Min Max Unit
Input Voltage All VIN -0.3 15 V
Continuous
SEQ, SYNC, VS+ All 7 V
CLK, DATA, SMBALERT All 3.6 V
Operating Ambient Temperature All TA -40 85 °C
(see Thermal Considerations section)
Storage Temperature All Tstg -55 125 °C
Electrical Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions.
Parameter Device Symbol Min Typ Max Unit
Operating Input Voltage All VIN 3 14.4 Vdc
Maximum Input Current All IIN,max 2.8 Adc
(VIN=3V to 14V, IO=IO, max )
Input No Load Current
(VIN = 12Vdc, IO = 0, module enabled)
VO,set = 0.6
Vdc IIN,No load 17.5 mA
VO,set =
5Vdc IIN,No load 43 mA
Input Stand-by Current
(VIN = 12Vdc, module disabled) All IIN,stand-by 6.4 mA
Inrush Transient All I2t 1 A2s
Input Reflected Ripple Current, peak-to-peak
(5Hz to 20MHz, 1H source impedance; VIN =0 to 14V, IO= IOmax ; See
Test Configurations)
All 100 mAp-p
Input Ripple Rejection (120Hz) All -57 dB
GE Data Sheet
3A Di
g
ital PicoDL
y
nxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 3A Output Current
March 20, 2019 ©2016 General Electric Company. All rights reserved. Page 3
Electrical Specifications (continued)
Parameter Device Symbol Min Typ Max Unit
Output Voltage Set-point (with 0.1% tolerance for external
resistor used to set output voltage) All VO, set -1.0 +1.0 % VO, set
Output Voltage (Over all operating input voltage, resistive
load, and temperature conditions until end of life) All VO, set -3.0 +3.0 % VO, set
Adjustment Range (selected by an external resistor)
(Some output voltages may not be possible depending on the
input voltage – see Feature Descriptions Section)
All VO 0.6 5.5 Vdc
PMBus Adjustable Output Voltage Range All VO,adj -25 0 +25 %VO,set
PMBus Output Voltage Adjustment Step Size All 0.4 %VO,set
Remote Sense Range All 0.5 Vdc
Output Regulation (for VO 2.5Vdc)
Line (VIN=VIN, min to VIN, max) All
+0.4 % VO, set
Load (IO=IO, min to IO, max) All
10 mV
Output Regulation (for VO < 2.5Vdc)
Line (VIN=VIN, min to VIN, max) All
5 mV
Load (IO=IO, min to IO, max) All
10 mV
Temperature (Tref=TA, min to TA, max) All
0.4 % VO, set
Output Ripple and Noise on nominal output
(VIN=VIN, nom and IO=IO, min to IO, max Co = 0.1F // 22 F
ceramic ca
p
acitors)
Peak-to-Peak (5Hz to 20MHz bandwidth) All 50 100 mVpk-pk
RMS (5Hz to 20MHz bandwidth) All 20 38 mVrms
External Capacitance1
Without the Tunable LoopTM
ESR 1 m All CO, max 10 22 F
With the Tunable LoopTM
ESR 0.15 m All CO, max 22 1000 F
ESR 10 m All CO, max 22 3000 F
Output Current (in either sink or source mode) All Io 0 3 Adc
Output Current Limit Inception (Hiccup Mode)
(current limit does not operate in sink mode) All IO, lim 270 % Io,max
Output Short-Circuit Current All IO, s/c 268 mArms
(VO250mV) ( Hiccup Mode )
Efficiency VO,set = 0.6Vdc 72.4 %
VIN= 12Vdc, TA=25°C VO, set = 1.2Vdc
83.2 %
IO=IO, max , VO= VO,set V
O,set = 1.8Vdc
87.5 %
V
O,set = 2.5Vdc
90.1 %
V
O,set = 3.3Vdc
91.9 %
V
O,set = 5.0Vdc
94.0 %
Switching Frequency All fsw 600 kHz
1 External capacitors may require using the new Tunable LoopTM feature to ensure that the module is stable as well as getting the best
transient response. See the Tunable LoopTM section for details.
GE Data Sheet
3A Di
g
ital PicoDL
y
nxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 3A Output Current
March 20, 2019 ©2016 General Electric Company. All rights reserved. Page 4
Electrical Specifications (continued)
Parameter Device Symbol Min Typ Max Unit
Frequency Synchronization All
Synchronization Frequency Range All 510 720 kHz
High-Level Input Voltage All VIH 2.0 V
Low-Level Input Voltage All VIL 0.4 V
Input Current, SYNC All ISYNC 100 nA
Minimum Pulse Width, SYNC All tSYNC 100 ns
Maximum SYNC rise time All tSYNC_SH 100 ns
General Specifications
Parameter Device Min Typ Max Unit
Calculated MTBF (IO=0.8IO, max, TA=40°C) Telecordia Issue 2 Method 1
Case 3 All 19,508,839 Hours
Weight
0.96(0.034) g (oz.)
Feature Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. See
Feature Descriptions for additional information.
Parameter Device Symbol Min Typ Max Unit
On/Off Signal Interface
(VIN=VIN, min to VIN, max ; open collector or equivalent,
Signal referenced to GND)
Device code with suffix “4” – Positive Logic (See Ordering
Information)
Logic High (Module ON)
Input High Current All IIH 1 mA
Input High Voltage All VIH 2 VIN,max V
Logic Low (Module OFF)
Input Low Current All IIL 1 mA
Input Low Voltage All VIL -0.2 0.6 V
Device Code with no suffix – Negative Logic (See Ordering
Information)
(On/OFF pin is open collector/drain logic input with
external pull-up resistor; signal referenced to GND)
Logic High (Module OFF)
Input High Current All IIH — — 1 mA
Input High Voltage All VIH 2.0 — VIN, max Vdc
Logic Low (Module ON)
Input low Current All IIL — — 10 A
Input Low Voltage All VIL -0.2 — 0.6 Vdc
GE Data Sheet
3A Di
g
ital PicoDL
y
nxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 3A Output Current
March 20, 2019 ©2016 General Electric Company. All rights reserved. Page 5
Feature Specifications (cont.)
Parameter Device Symbol Min Typ Max Units
Turn-On Delay and Rise Times
(VIN=VIN, nom, IO=IO, max , VO to within ±1% of steady state)
Case 1: On/Off input is enabled and then input power is
applied (delay from instant at which VIN = VIN, min until Vo =
10% of Vo, set)
All Tdelay — 0.4 — msec
Case 2: Input power is applied for at least one second and
then the On/Off input is enabled (delay from instant at
which Von/Off is enabled until Vo = 10% of Vo, set) All Tdelay — 0.4 — msec
Output voltage Rise time (time for Vo to rise from
10% of Vo, set to 90% of Vo, set) All Trise — 2.4 — msec
Output voltage overshoot (TA = 25oC
VIN= VIN, min to VIN, max,IO = IO, min to IO, max)
With or without maximum external capacitance
3.0 % VO, set
Over Temperature Protection
(See Thermal Considerations section) All Tref 150 °C
PMBus Over Temperature Warning Threshold* All TWARN 130 °C
Tracking Accuracy (Power-Up: 2V/ms) All VSEQ –Vo 100 mV
(Power-Down: 2V/ms) All VSEQ –Vo 100 mV
(VIN, min to VIN, max; IO, min to IO, max VSEQ < Vo)
Input Undervoltage Lockout
Turn-on Threshold All 2.71 Vdc
Turn-off Threshold All 2.41 Vdc
Hysteresis All
0.3 Vdc
PMBus Adjustable Input Under Voltage Lockout Thresholds All 2.5 14 Vdc
Resolution of Adjustable Input Under Voltage Threshold All 500 mV
PGOOD (Power Good)
Signal Interface Open Drain, Vsupply 5VDC
Overvoltage threshold for PGOOD ON All 108 %VO, set
Overvoltage threshold for PGOOD OFF All 110 %VO, set
Undervoltage threshold for PGOOD ON All 92 %VO, set
Undervoltage threshold for PGOOD OFF All 90 %VO, set
Pulldown resistance of PGOOD pin All 50
Sink current capability into PGOOD pin All 5 mA
* Over temperature Warning – Warning may not activate before alarm and unit may shutdown before warning
GE Data Sheet
3A Di
g
ital PicoDL
y
nxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 3A Output Current
March 20, 2019 ©2016 General Electric Company. All rights reserved. Page 6
Digital Interface Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. See
Feature Descriptions for additional information.
Parameter Conditions Symbol Min Typ Max Unit
PMBus Signal Interface Characteristics
Input High Voltage (CLK, DATA) VIH 2.1 3.6 V
Input Low Voltage (CLK, DATA) VIL 0.8 V
Input high level current (CLK, DATA) IIH -10 10 A
Input low level current (CLK, DATA) IIL -10 10 A
Output Low Voltage (CLK, DATA, SMBALERT#) IOUT=2mA VOL 0.4 V
Output high level open drain leakage current (DATA,
SMBALERT#) VOUT=3.6V IOH 0 10 A
Pin capacitance CO 0.7 pF
PMBus Operating frequency range Slave Mode FPMB 10 400 kHz
Data hold time
Receive Mode
Transmit Mode tHD:DAT 0
300 ns
Data setup time tSU:DAT 250 ns
Measurement System Characteristics
Read delay time tDLY 153 192 231 s
Output current measurement range IRNG 0 18 A
Output current measurement resolution IRES 62.5 mA
Output current measurement gain accuracy accuracy
at 25°C (with IOUT, CORR)
IACC ±5 %
Output current measurement offset IOFST 0.1 A
VOUT measurement range VOUT(rng) 0 5.5 V
VOUT measurement resolution VOUT(res) 15.625 mV
VOUT measurement accuracy VOUT(gain) -15 15 %
VOUT measurement offset VOUT(ofst) -3 3 %
VIN measurement range VIN(rng) 3 14.4 V
VIN measurement resolution VIN(res) 32.5 mV
VIN measurement accuracy VIN(gain) -15 15 %
VIN measurement offset VIN(ofst) -5.5 1.4 LSB
GE Data Sheet
3A Di
g
ital PicoDL
y
nxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 3A Output Current
March 20, 2019 ©2016 General Electric Company. All rights reserved. Page 7
Characteristic Curves
The following figures provide typical characteristics for the 3A Digital PicoDLynxTM at 0.6Vo and 25oC.
EFFICIENCY, (%)
OUTPUT CURRENT, Io (A)
OUTPUT CURRENT, IO (A) AMBIENT TEMPERATURE, TA OC
Figure 1. Converter Efficiency versus Output Current. Figure 2. Derating Output Current versus Ambient
Temperature and Airflow.
OUTPUT VOLTAGE
VO (V) (10mV/div)
OUTPUT CURRENT, OUTPUT VOLTAGE
IO (A) (1Adiv) VO (V) (10mV/div)
TIME, t (1s/div) TIME, t (20s /div)
Figure 3. Typical output ripple and noise (CO=10F ceramic,
VIN = 12V, Io = Io,max, ).
Figure 4. Transient Response to Dynamic Load Change from
50% to 100% at 12Vin, Cout= 1x47uF+2x330uF, CTune=27nF,
RTune=180
OUTPUT VOLTAGE ON/OFF VOLTAGE
VO (V) (200mV/div) VON/OFF (V) (5V/div)
OUTPUT VOLTAGE INPUT VOLTAGE
VO (V) (200mV/div) VIN (V) (5V/div)
TIME, t (2ms/div) TIME, t (2ms/div)
Figure 5. Typical Start-up Using On/Off Voltage (Io = Io,max). Figure 6. Typical Start-up Using Input Voltage (VIN = 12V, Io=
Io,max).
40
45
50
55
60
65
70
75
80
85
90
00.511.522.53
Vin=3.3V
Vin=14V
Vin=12V
1.5
2.0
2.5
3.0
3.5
55 65 75 85 95 105
0.5m/s
(100LFM)
NC
Standard Part
(85°C)
Ruggedized (D)
Part (105°C)
GE Data Sheet
3A Di
g
ital PicoDL
y
nxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 3A Output Current
March 20, 2019 ©2016 General Electric Company. All rights reserved. Page 8
Characteristic Curves
The following figures provide typical characteristics for the 3A Digital PicoDLynxTM at 1.2Vo and 25oC.
EFFICIENCY, (%)
OUTPUT CURRENT, Io (A)
OUTPUT CURRENT, IO (A) AMBIENT TEMPERATURE, TA OC
Figure 7. Converter Efficiency versus Output Current. Figure 8. Derating Output Current versus Ambient
Temperature and Airflow.
OUTPUT VOLTAGE
VO (V) (10mV/div)
OUTPUT CURRENT, OUTPUT VOLTAGE
IO (A) (1Adiv) VO (V) (10mV/div)
TIME, t (1s/div) TIME, t (20s /div)
Figure 9. Typical output ripple and noise (CO=10F ceramic,
VIN = 12V, Io = Io,max, ).
Figure 10. Transient Response to Dynamic Load Change from
50% to 100% at 12Vin, Cout= 1x47uF+1x330uF, CTune=10nF
& RTune=267
OUTPUT VOLTAGE ON/OFF VOLTAGE
VO (V) (500mV/div) VON/OFF (V) (5V/div)
OUTPUT VOLTAGE INPUT VOLTAGE
VO (V) (500mV/div) VIN (V) (5V/div)
TIME, t (2ms/div) TIME, t (2ms/div)
Figure 11. Typical Start-up Using On/Off Voltage (Io = Io,max). Figure 12. Typical Start-up Using Input Voltage (VIN = 12V, Io=
Io,max).
50
55
60
65
70
75
80
85
90
95
00.511.522.53
Vin=3.3V
Vin=14V
Vin=12V
1.5
2.0
2.5
3.0
3.5
55 65 75 85 95 105
0.5m/s
(100LFM)
NC
Standard
Par t (85 C)
Ruggedized (D)
Part (105°C)
GE Data Sheet
3A Di
g
ital PicoDL
y
nxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 3A Output Current
March 20, 2019 ©2016 General Electric Company. All rights reserved. Page 9
Characteristic Curves
The following figures provide typical characteristics for the 3A Digital PicoDLynxTM at 1.8Vo and 25oC.
EFFICIENCY, (%)
OUTPUT CURRENT, Io (A)
OUTPUT CURRENT, IO (A) AMBIENT TEMPERATURE, TA OC
Figure 13. Converter Efficiency versus Output Current. Figure 14. Derating Output Current versus Ambient
Temperature and Airflow.
OUTPUT VOLTAGE
VO (V) (10mV/div)
OUTPUT CURRENT, OUTPUT VOLTAGE
IO (A) (1Adiv) VO (V) (10mV/div)
TIME, t (1s/div) TIME, t (20s /div)
Figure 15. Typical output ripple and noise (CO=10F ceramic,
VIN = 12V, Io = Io,max, ).
Figure 16. Transient Response to Dynamic Load Change from
50% to 100% at 12Vin, Cout= 1x47uF +1x330uF, CTune=10nF
& RTune=267
OUTPUT VOLTAGE ON/OFF VOLTAGE
VO (V) (500mV/div) VON/OFF (V) (5V/div)
OUTPUT VOLTAGE INPUT VOLTAGE
VO (V) (500mV/div) VIN (V) (5V/div)
TIME, t (2ms/div) TIME, t (2ms/div)
Figure 17. Typical Start-up Using On/Off Voltage (Io = Io,max). Figure 18. Typical Start-up Using Input Voltage (VIN = 12V, Io=
Io,max).
60
65
70
75
80
85
90
95
00.511.522.53
Vin=3.3V
Vin=14V
Vin=12V
1.5
2.0
2.5
3.0
3.5
55 65 75 85 95 105
0.5m/s
(100LFM)
NC
Standard Part
(85°C)
Ruggedized (D)
Part (105°C)
GE Data Sheet
3A Di
g
ital PicoDL
y
nxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 3A Output Current
March 20, 2019 ©2016 General Electric Company. All rights reserved. Page 10
Characteristic Curves
The following figures provide typical characteristics for the 3A Digital PicoDLynxTM at 2.5Vo and 25oC.
EFFICIENCY, (%)
OUTPUT CURRENT, Io (A)
OUTPUT CURRENT, IO (A) AMBIENT TEMPERATURE, TA OC
Figure 19. Converter Efficiency versus Output Current. Figure 20. Derating Output Current versus Ambient
Temperature and Airflow.
OUTPUT VOLTAGE
VO (V) (20mV/div)
OUTPUT CURRENT, OUTPUT VOLTAGE
IO (A) (1Adiv) VO (V) (20mV/div)
TIME, t (1s/div) TIME, t (20s /div)
Figure 21. Typical output ripple and noise (CO=10F ceramic,
VIN = 12V, Io = Io,max, ).
Figure 22. Transient Response to Dynamic Load Change from
50% to 100% at 12Vin, Cout= 2x47uF, CTune=2700pF &
RTune=267
OUTPUT VOLTAGE ON/OFF VOLTAGE
VO (V) (1V/div) VON/OFF (V) (5V/div)
OUTPUT VOLTAGE INPUT VOLTAGE
VO (V) (1V/div) VIN (V) (5V/div)
TIME, t (2ms/div) TIME, t (2ms/div)
Figure 23. Typical Start-up Using On/Off Voltage (Io = Io,max). Figure 24. Typical Start-up Using Input Voltage (VIN = 12V, Io=
Io,max).
60
65
70
75
80
85
90
95
100
00.511.522.53
Vin=4.5V
Vin=14V
Vin=12V
1.5
2.0
2.5
3.0
3.5
55 65 75 85 95 105
0.5m/s
(100LFM)
NC
Standard
Part (85°C)
Ruggedized(D)
Part(105°C)
GE Data Sheet
3A Di
g
ital PicoDL
y
nxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 3A Output Current
March 20, 2019 ©2016 General Electric Company. All rights reserved. Page 11
Characteristic Curves
The following figures provide typical characteristics for the 3A Digital PicoDLynxTM at 3.3Vo and 25oC.
EFFICIENCY, (%)
OUTPUT CURRENT, Io (A)
OUTPUT CURRENT, IO (A) AMBIENT TEMPERATURE, TA OC
Figure 25. Converter Efficiency versus Output Current. Figure 26. Derating Output Current versus Ambient
Temperature and Airflow.
OUTPUT VOLTAGE
VO (V) (20mV/div)
OUTPUT CURRENT, OUTPUT VOLTAGE
IO (A) (1Adiv) VO (V) (20mV/div)
TIME, t (1s/div) TIME, t (20s /div)
Figure 27. Typical output ripple and noise (CO=10F ceramic,
VIN = 12V, Io = Io,max, ).
Figure 28 Transient Response to Dynamic Load Change from
50% to 100% at 12Vin, Cout= 2x47uF, CTune=2200pF &
RTune=267
OUTPUT VOLTAGE ON/OFF VOLTAGE
VO (V) (1V/div) VON/OFF (V) (5V/div)
OUTPUT VOLTAGE INPUT VOLTAGE
VO (V) (1V/div) VIN (V) (5V/div)
TIME, t (2ms/div) TIME, t (2ms/div)
Figure 29. Typical Start-up Using On/Off Voltage (Io = Io,max). Figure 30. Typical Start-up Using Input Voltage (VIN = 12V, Io=
Io,max).
60
65
70
75
80
85
90
95
100
00.511.522.53
Vin=4.5V
Vin=14V
Vin=12V
1.5
2.0
2.5
3.0
3.5
55 65 75 85 95 105
0.5m/s
(100LFM)
NC
Standard
Part (85°C)
Ruggedized (D)
Part (105°C)
GE Data Sheet
3A Di
g
ital PicoDL
y
nxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 3A Output Current
March 20, 2019 ©2016 General Electric Company. All rights reserved. Page 12
Characteristic Curves
The following figures provide typical characteristics for the 3A Digital PicoDLynxTM at 5Vo and 25oC.
EFFICIENCY, (%)
OUTPUT CURRENT, Io (A)
OUTPUT CURRENT, IO (A) AMBIENT TEMPERATURE, TA OC
Figure 31. Converter Efficiency versus Output Current. Figure 32. Derating Output Current versus Ambient
Temperature and Airflow .
OUTPUT VOLTAGE
VO (V) (50mV/div)
OUTPUT CURRENT, OUTPUT VOLTAGE
IO (A) (1Adiv) VO (V) (50mV/div)
TIME, t (1s/div) TIME, t (20s /div)
Figure 33. Typical output ripple and noise (CO=10μF
ceramic, VIN = 1 2 V, Io = Io,max, ).
Figure 34. Transient Response to Dynamic Load
Change from 50% to 100% at 12Vin, Cout= 1x47uF,
CTune=8 2 0pF & RTune=267
OUTPUT VOLTAGE ON/OFF VOLTAGE
VO (V) (2V/div) VON/OFF (V) (5V/div)
OUTPUT VOLTAGE INPUT VOLTAGE
VO (V) (2V/div) VIN (V) (5V/div)
TIME, t (2ms/div) TIME, t (2ms/div)
Figure 35. Typical Start-up Using On/Off Voltage (Io =
Io,max). Figure 36. Typical Start-up Using Input Voltage (VIN =
12V, Io = Io,max).
60
65
70
75
80
85
90
95
100
00.511.522.53
Vin=7V Vin=14V
Vin=12V
1.5
2.0
2.5
3.0
3.5
45 55 65 75 85 95 105
1m/s
(200LFM)
0.5m/s
(100LFM)
NC
Ruggedized (D)
Part (105°C)
Standard
Part (85°C)
GE Data Sheet
3A Di
g
ital PicoDL
y
nxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 3A Output Current
March 20, 2019 ©2016 General Electric Company. All rights reserved. Page 13
Design Considerations
Input Filtering
The 3A Digital PicoDLynxTM module should be connected to a
low ac-impedance source. A highly inductive source can
affect the stability of the module. An input capacitance must
be placed directly adjacent to the input pin of the module, to
minimize input ripple voltage and ensure module stability.
High frequency switching noise can be reduced by using
suitable decoupling ceramic caps. Refer to AN04-006 and
AN04-002 for more guidelines
To minimize input voltage ripple, ceramic capacitors are
recommended at the input of the module. Figure 37 shows
the input ripple voltage for various output voltages at 3A of
load current with 1x22 µF or 2x22 µF ceramic capacitors and
an input of 12V.
Figure 37. Input ripple voltage for various output voltages
with 2x22 µF or 3x22 µF ceramic capacitors at the input
(3A load). Input voltage is 12V.
Output Filtering
These modules are designed for low output ripple voltage and
will meet the maximum output ripple specification with 0.1 µF
ceramic and 22 µF ceramic capacitors at the output of the
module. However, additional output filtering may be required
by the system designer for a number of reasons. First, there
may be a need to further reduce the output ripple and noise of
the module. Second, the dynamic response characteristics
may need to be customized to a particular load step change.
To reduce the output ripple and improve the dynamic response
to a step load change, additional capacitance at the output can
be used. Low ESR polymer and ceramic capacitors are
recommended to improve the dynamic response of the
module. Figure 38 provides output ripple information for
different external capacitance values at various Vo and a full
load current of 3A. For stable operation of the module, limit the
capacitance to less than the maximum output capacitance as
specified in the electrical specification table. Optimal
performance of the module can be achieved by using the
Tunable LoopTM feature described later in this data sheet.
Figure 38. Output ripple voltage for various output voltages
with external 1x10 µF, 1x22 µF, 1x47 µF or 2x47 µF ceramic
capacitors at the output (3A load). Input voltage is 12V.
Safety Considerations
For safety agency approval the power module must be
installed in compliance with the spacing and separation
requirements of the end-use safety agency standards, i.e., UL
60950-1 2nd, CSA C22.2 No. 60950-1-07, DIN EN 60950-1:2006
+ A11 (VDE0805 Teil 1 + A11):2009-11; EN 60950-1:2006 +
A11:2009-03.
For the converter output to be considered meeting the
requirements of safety extra-low voltage (SELV), the input must
meet SELV requirements. The power module has extra-low
voltage (ELV) outputs when all inputs are ELV.
The input to these units is to be provided with a fast acting
fuse with a maximum rating of 5 A in the positive input lead.
An example of such a fuse is the ABC series by Littelfuse.
60
70
80
90
100
110
120
130
140
0.51.52.53.54.5
R ip p le (m V p -p )
Output Voltage(Volts)
1x22uF
2x22uF
0
10
20
30
40
50
0.5 1.5 2.5 3.5 4.5
Ripple (mVp-p)
Outpu t V o l tage(V o l ts)
1x10uF Ext Cap
1x22uF Ext Cap
1x47uF Ext Cap
2x47uF Ext Cap
GE Data Sheet
3A Di
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ital PicoDL
y
nxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 3A Output Current
March 20, 2019 ©2016 General Electric Company. All rights reserved. Page 14
Analog Feature Descriptions
Remote On/Off
The module can be turned ON and OFF either by using the
ON/OFF pin (Analog interface) or through the PMBus interface
(Digital). The module can be configured in a number of ways
through the PMBus interface to react to the two ON/OFF
inputs:
Module ON/OFF can be controlled only through
the analog interface (digital interface ON/OFF
commands are ignored)
Module ON/OFF can be controlled only through
the PMBus interface (analog interface is ignored)
Module ON/OFF can be controlled by either the
analog or digital interface
The default state of the module (as shipped from the factory)
is to be controlled by the analog interface only. If the digital
interface is to be enabled, or the module is to be controlled
only through the digital interface, this change must be made
through the PMBus. These changes can be made and written
to non-volatile memory on the module so that it is
remembered for subsequent use.
Analog On/Off
The 3A Digital PicoDLynxTM power modules feature an On/Off
pin for remote On/Off operation. Two On/Off logic options
are available. In the Positive Logic On/Off option, (device
code suffix “4” – see Ordering Information), the module turns
ON during a logic High on the On/Off pin and turns OFF
during a logic Low. With the Negative Logic On/Off option,
(no device code suffix, see Ordering Information), the module
turns OFF during logic High and ON during logic Low. The
On/Off signal should be always referenced to ground. For
either On/Off logic option, leaving the On/Off pin
disconnected will turn the module ON when input voltage is
present.
For positive logic modules, the circuit configuration for using
the On/Off pin is shown in Figure 39. When the external
transistor Q2 is in the OFF state, the internal transistor Q1 is
turned ON, and the internal PWM #Enable signal is pulled low
causing the module to be ON. When transistor Q2 is turned
ON, the On/Off pin is pulled low and the module is OFF. A
suggested value for Rpullup is 20k.
For negative logic On/Off modules, the circuit configuration is
shown in Fig. 40. The On/Off pin should be pulled high with
an external pull-up resistor (suggested value for the 3V to
14V input range is 20Kohms). When transistor Q2 is in the
OFF state, the On/Off pin is pulled high, transistor Q1 is
turned ON and the module is OFF. To turn the module ON, Q2
is turned ON pulling the On/Off pin low, turning transistor Q1
OFF resulting in the PWM Enable pin going high.
Digital On/Off
Please see the Digital Feature Descriptions section.
Figure 39. Circuit configuration for using positive On/Off
logic.
Figure 40. Circuit configuration for using negative On/Off
logic.
Monotonic Start-up and Shutdown
The module has monotonic start-up and shutdown behavior
for any combination of rated input voltage, output current
and operating temperature range.
Startup into Pre-biased Output
The module can start into a prebiased output as long as the
prebias voltage is 0.5V less than the set output voltage.
Analog Output Voltage Programming
The output voltage of the module is programmable to any
voltage from 0.6dc to 5.5Vdc by connecting a resistor
between the Trim and SIG_GND pins of the module. Certain
restrictions apply on the output voltage set point depending
on the input voltage. These are shown in the Output Voltage
vs. Input Voltage Set Point Area plot in Fig. 41. The Upper
Limit curve shows that for output voltages lower than 1V,
the input voltage must be lower than the maximum of
14.4V. The Lower Limit curve shows that for output voltages
higher than 0.6V, the input voltage needs to be larger than
the minimum of 3V.
10K
Q2
22K
Q1
22K
Rpullup
+3.3V
+VIN
GND
+
_
VON/OFF
ON/OFF
IENABLE
DLYNX MODULE
10K
Q2
22K
Q1
22K
Rpullup
+3.3V
+VIN
GND
_
+
I
ON/OFF
V
ON/OFF ENABLE
DLYNX MODULE
GE Data Sheet
3A Di
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ital PicoDL
y
nxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 3A Output Current
March 20, 2019 ©2016 General Electric Company. All rights reserved. Page 15
Figure 41. Output Voltage vs. Input Voltage Set Point Area
plot showing limits where the output voltage can be set
for different input voltages.
VO(+)
TRIM
VS
─
Rtrim
LOAD
VIN(+)
ON/OFF
VS+
SIG_GND
Caution – Do not connect SIG_GND to GND elsewhere in the
layout
Figure 42. Circuit configuration for programming output
voltage using an external resistor.
Without an external resistor between Trim and SIG_GND
pins, the output of the module will be 0.6Vdc.To calculate the
value of the trim resistor, Rtrim for a desired output voltage,
should be as per the following equation:

k
Vo
Rtrim 6.0
12
Rtrim is the external resistor in k
Vo is the desired output voltage.
Table 1 provides Rtrim values required for some common
output voltages.
Table 1
VO, set (V) Rtrim (K)
0.6 Open
0.9 40
1.0 30
1.2 20
1.5 13.33
1.8 10
2.5 6.316
3.3 4.444
5.0 2.727
Digital Output Voltage Adjustment
Please see the Digital Feature Descriptions section.
Remote Sense
The power module has a Remote Sense feature to minimize
the effects of distribution losses by regulating the voltage
between the sense pins (VS+ and VS-). The voltage drop
between the sense pins and the VOUT and GND pins of the
module should not exceed 0.5V.
Analog Voltage Margining
Output voltage margining can be implemented in the
module by connecting a resistor, Rmargin-up, from the Trim pin
to the ground pin for margining-up the output voltage and
by connecting a resistor, Rmargin-down, from the Trim pin to
output pin for margining-down. Figure 43 shows the circuit
configuration for output voltage margining. The POL
Programming Tool, available at www.gecriticalpower.com
under the Downloads section, also calculates the values of
Rmargin-up and Rmargin-down for a specific output voltage and %
margin. Please consult your local GE technical
representative for additional details.
Figure 43. Circuit Configuration for margining Output
voltage.
Digital Output Voltage Margining
Please see the Digital Feature Descriptions section.
0
2
4
6
8
10
12
14
16
0.511.522.533.544.555.56
Input Voltage (v)
Outpu t Vo ltag e (V )
Lower
Upper
Vo
MODULE
SIG_GND
Trim
Q1
Rtrim
Rmargin-up
Q2
Rmargin-down
GE Data Sheet
3A Di
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ital PicoDL
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nxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 3A Output Current
March 20, 2019 ©2016 General Electric Company. All rights reserved. Page 16
Output Voltage Sequencing
The power module includes a sequencing feature, EZ-
SEQUENCE that enables users to implement various types of
output voltage sequencing in their applications. This is
accomplished via an additional sequencing pin. When not
using the sequencing feature, leave it unconnected.
The voltage applied to the SEQ pin should be scaled down by
the same ratio as used to scale the output voltage down to
the reference voltage of the module. This is accomplished by
an external resistive divider connected across the
sequencing voltage before it is fed to the SEQ pin as shown in
Fig. 44. In addition, a small capacitor (suggested value 100pF)
should be connected across the lower resistor R1.
For all DLynx modules, the minimum recommended delay
between the ON/OFF signal and the sequencing signal is
10ms to ensure that the module output is ramped up
according to the sequencing signal. This ensures that the
module soft-start routine is completed before the sequencing
signal is allowed to ramp up.
Figure 44. Circuit showing connection of the sequencing
signal to the SEQ pin.
When the scaled down sequencing voltage is applied to the
SEQ pin, the output voltage tracks this voltage until the
output reaches the set-point voltage. The final value of the
sequencing voltage must be set higher than the set-point
voltage of the module. The output voltage follows the
sequencing voltage on a one-to-one basis. By connecting
multiple modules together, multiple modules can track their
output voltages to the voltage applied on the SEQ pin.
The module’s output can track the SEQ pin signal with slopes
of up to 0.5V/msec during power-up or power-down.
To initiate simultaneous shutdown of the modules, the SEQ
pin voltage is lowered in a controlled manner. The output
voltage of the modules tracks the voltages below their set-
point voltages on a one-to-one basis. A valid input voltage
must be maintained until the tracking and output voltages
reach ground potential.
Note that in all digital DLynx series of modules, the PMBus
Output Undervoltage Fault will be tripped when sequencing
is employed. This will be detected using the STATUS_WORD
and STATUS_VOUT PMBus commands. In addition, the
SMBALERT# signal will be asserted low as occurs for all faults
and warnings. To avoid the module shutting down due to the
Output Undervoltage Fault, the module must be set to
continue operation without interruption as the response to
this fault (see the description of the PMBus command
VOUT_UV_FAULT_RESPONSE for additional information).
Overcurrent Protection
To provide protection in a fault (output overload) condition,
the unit is equipped with internal current-limiting circuitry
and can endure current limiting continuously. At the point of
current-limit inception, the unit enters hiccup mode. The unit
operates normally once the output current is brought back
into its specified range.
Digital Adjustable Overcurrent Warning
Please see the Digital Feature Descriptions section.
Overtemperature Protection
To provide protection in a fault condition, the unit is
equipped with a thermal shutdown circuit. The unit will shut
down if the overtemperature threshold of 150oC(typ) is
exceeded at the thermal reference point Tref .Once the unit
goes into thermal shutdown it will then wait to cool before
attempting to restart.
Digital Temperature Status via PMBus
Please see the Digital Feature Descriptions section.
Digitally Adjustable Output Over and Under Voltage
Protection
Please see the Digital Feature Descriptions section.
Input Undervoltage Lockout
At input voltages below the input undervoltage lockout limit,
the module operation is disabled. The module will begin to
operate at an input voltage above the undervoltage lockout
turn-on threshold.
Digitally Adjustable Input Undervoltage Lockout
Please see the Digital Feature Descriptions section.
Digitally Adjustable Power Good Thresholds
Please see the Digital Feature Descriptions section.
Synchronization
The module switching frequency can be synchronized to a
signal with an external frequency within a specified range.
Synchronization can be done by using the external signal
applied to the SYNC pin of the module as shown in Fig. 45,
with the converter being synchronized by the rising edge of
the external signal. The Electrical Specifications table
specifies the requirements of the external SYNC signal. If the
SYNC pin is not used, the module should free run at the
default switching frequency. If synchronization is not being
used, connect the SYNC pin to GND.
100 pF
DLynx Module
R1=Rtrim
20K
SIG_GND
SEQ
SEQ
V
GE Data Sheet
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nxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 3A Output Current
March 20, 2019 ©2016 General Electric Company. All rights reserved. Page 17
MODULE
SYNC
GND
+
─
Figure 45. External source connections to synchronize
switching frequency of the module.
Measuring Output Current, Output Voltage and
Input Voltage
Please see the Digital Feature Descriptions section.
Dual Layout
Identical dimensions and pin layout of Analog and Digital
PicoDLynx modules permit migration from one to the other
without needing to change the layout. To support this, 2
separate Trim Resistor locations have to be provided in the
layout. As shown in Fig. 46, for the digital modules, the
resistor is connected between the TRIM pad and SGND and in
the case of the analog module it is connected between TRIM
and GND.
Caution – For digital modules, do not connect SIG_GND to
GND elsewhere in the layout
Figure 46. Connections to support either Analog or Digital
PicoDLynx on the same layout.
Tunable LoopTM
The module has a feature that optimizes transient response
of the module called Tunable LoopTM.
External capacitors are usually added to the output of the
module for two reasons: to reduce output ripple and noise
(see Figure 38) and to reduce output voltage deviations from
the steady-state value in the presence of dynamic load
current changes. Adding external capacitance however
affects the voltage control loop of the module, typically
causing the loop to slow down with sluggish response.
Larger values of external capacitance could also cause the
module to become unstable.
The Tunable LoopTM allows the user to externally adjust the
voltage control loop to match the filter network connected
to the output of the module. The Tunable LoopTM is
implemented by connecting a series R-C between the VS+
and TRIM pins of the module, as shown in Fig. 47. This R-C
allows the user to externally adjust the voltage loop
feedback compensation of the module.
Figure. 47. Circuit diagram showing connection of RTUME
and CTUNE to tune the control loop of the module.
Recommended values of RTUNE and CTUNE for different output
capacitor combinations are given in Table 2. Table 2 shows
the recommended values of RTUNE and CTUNE for different
values of ceramic output capacitors up to 1000uF that
might be needed for an application to meet output ripple
and noise requirements. Selecting RTUNE and CTUNE according
to Table 2 will ensure stable operation of the module.
In applications with tight output voltage limits in the
presence of dynamic current loading, additional output
capacitance will be required. Table 3 lists recommended
values of RTUNE and CTUNE in order to meet 2% output
voltage deviation limits for some common output voltages
in the presence of a 1.5A to 3.0A step change (50% of full
load), with an input voltage of 12V.
Please contact your GE technical representative to obtain
more details of this feature as well as for guidelines on how
to select the right value of external R-C to tune the module
for best transient performance and stable operation for
other output capacitance values.
VS+
MODULE
SIG_GND
TRIM
VOUT
RTune
CTune
RTrim
CO
GND
MODULE
(PVX003 / PDT003)
Rtrim1
for
Digital
GND(Pin 7)
SIG_GND
TRIM
Rtrim2
for
nalog
GE Data Sheet
3A Di
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nxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 3A Output Current
March 20, 2019 ©2016 General Electric Company. All rights reserved. Page 18
Table 2. General recommended values of of RTUNE and CTUNE
for Vin=12V and various external ceramic capacitor
combinations.
Table 3. Recommended values of RTUNE and CTUNE to obtain
transient deviation of 2% of Vout for a 1.5A step load with
Vin=12V.
Vo 5V 3.3V 2.5V 1.8V 1.2V 0.6V
Co 1x47F 1x47F 2x47F
1x330F
Polymer
1x330F
Polymer
2x330F
Polymer
RTUNE 270 220 180 180 180 180
CTUNE 1500pF 1800pF 3300pF 8200pF 8200pF 33nF
V 68mV 60mV 37mV 18mV 18mV 10mV
Note: The capacitors used in the Tunable Loop tables are
47 F/3 m ESR ceramic and 330 F/12 m ESR polymer
capacitors.
Co 1x47F 2x47F 4x47F 6x47F 10x47F
RTUNE 270 220 180 180 180
CTUNE 1500pF 1800pF 3300pF 4700pF 4700pF
GE Data Sheet
3A Di
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nxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 3A Output Current
March 20, 2019 ©2016 General Electric Company. All rights reserved. Page 19
Digital Feature Descriptions
PMBus Interface Capability
The 3A Digital PicoDLynxTM power modules have a PMBus
interface that supports both communication and control. The
PMBus Power Management Protocol Specification can be
obtained from www.pmbus.org. The modules support a
subset of version 1.1 of the specification (see Table 6 for a list
of the specific commands supported). Most module
parameters can be programmed using PMBus and stored as
defaults for later use.
All communication over the module PMBus interface must
support the Packet Error Checking (PEC) scheme. The PMBus
master must generate the correct PEC byte for all
transactions, and check the PEC byte returned by the
module.
The module also supports the SMBALERT# response protocol
whereby the module can alert the bus master if it wants to
talk. For more information on the SMBus alert response
protocol, see the System Management Bus (SMBus)
specification.
The module has non-volatile memory that is used to store
configuration settings. Not all settings programmed into the
device are automatically saved into this non-volatile
memory, only those specifically identified as capable of
being stored can be saved (see Table 6 for which command
parameters can be saved to non-volatile storage).
PMBus Data Format
For commands that set thresholds, voltages or report such
quantities, the module supports the “Linear” data format
among the three data formats supported by PMBus. The
Linear Data Format is a two byte value with an 11-bit, two’s
complement mantissa and a 5-bit, two’s complement
exponent. The format of the two data bytes is shown below:
Data Byte High
7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0
Data Byte Low
Exponent
MSB
Mantissa
MSB
The value is of the number is then given by
Value = Mantissa x 2 Exponent
PMBus Addressing
The power module can be addressed through the PMBus
using a device address. The module has 64 possible
addresses (0 to 63 in decimal) which can be set using
resistors connected from the ADDR0 and ADDR1 pins to
SIG_GND. Note that some of these addresses (0, 1, 2, 3, 4, 5,
6, 7, 8, 9, 10, 11 12, 40, 44, 45, 55 in decimal) are reserved
according to the SMBus specifications and may not be
useable. The address is set in the form of two octal (0 to 7)
digits, with each pin setting one digit. The ADDR1 pin sets the
high order digit and ADDR0 sets the low order digit. The
resistor values suggested for each digit are shown in Table 4
(1% tolerance resistors are recommended). Note that if either
address resistor value is outside the range specified in Table
4, the module will respond to address 127.
Table 4
Digit Resistor Value (K)
0 10
1 15.4
2 23.7
3 36.5
4 54.9
5 84.5
6 130
7 200
The user must know which I2C addresses are reserved in a
system for special functions and set the address of the
module to avoid interfering with other system operations.
Both 100kHz and 400kHz bus speeds are supported by the
module. Connection for the PMBus interface should follow
the High Power DC specifications given in section 3.1.3 in the
SMBus specification V2.0 for the 400kHz bus speed or the
Low Power DC specifications in section 3.1.2. The complete
SMBus specification is available from the SMBus web site,
smbus.org.
ADDR0
SIG_GND
R
ADDR0
R
ADDR1
ADDR1
Figure 48. Circuit showing connection of resistors used to
set the PMBus address of the module.
PMBus Enabled On/Off
The module can also be turned on and off via the PMBus
interface. The OPERATION command is used to actually turn
the module on and off via the PMBus, while the
ON_OFF_CONFIG command configures the combination of
analog ON/OFF pin input and PMBus commands needed to
turn the module on and off. Bit [7] in the OPERATION
command data byte enables the module, with the following
functions:
0 : Output is disabled
1 : Output is enabled
This module uses the lower five bits of the ON_OFF_CONFIG
data byte to set various ON/OFF options as follows:
Bit Position 43 2 1 0
Access r/w r/w r/w r/w r
Function PU CMD CPR POL CPA
Default Value 1 0 1 1 1
GE Data Sheet
3A Di
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nxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 3A Output Current
March 20, 2019 ©2016 General Electric Company. All rights reserved. Page 20
PU: Sets the default to either operate any time input power is
present or for the ON/OFF to be controlled by the analog
ON/OFF input and the PMBus OPERATION command. This bit
is used together with the CP, CMD and ON bits to determine
startup.
Bit Value Action
0
Module powers up any time power is
present regardless of state of the analog
ON/OFF pin
1
Module does not power up until
commanded by the analog ON/OFF pin and
the OPERATION command as programmed
in bits [2:0] of the ON_OFF_CONFIG register.
CMD: The CMD bit controls how the device responds to the
OPERATION command.
Bit Value Action
0 Module ignores the ON bit in the OPERATION
command
1 Module responds to the ON bit in the
OPERATION command
CPR: Sets the response of the analog ON/OFF pin. This bit is
used together with the CMD, PU and ON bits to determine
startup.
Bit Value Action
0
Module ignores the analog ON/OFF pin, i.e.
ON/OFF is only controlled through the
PMBUS via the OPERATION command
1 Module requires the analog ON/OFF pin to
be asserted to start the unit
PMBus Adjustable Soft Start Rise Time
The soft start rise time can be adjusted in the module via
PMBus. When setting this parameter, make sure that the
charging current for output capacitors can be delivered by
the module in addition to any load current to avoid nuisance
tripping of the overcurrent protection circuitry during startup.
The TON_RISE command sets the rise time in ms, and allows
choosing soft start times between 600s and 9ms, with
possible values listed in Table 5. Note that the exponent is
fixed at -4 (decimal) and the upper two bits of the mantissa
are also fixed at 0.
Table 5
Rise Time Exponent Mantissa
600s 11100 00000001010
900s 11100 00000001110
1.2ms 11100 00000010011
1.8ms 11100 00000011101
2.7ms 11100 00000101011
4.2ms 11100 00001000011
6.0ms 11100 00001100000
9.0ms 11100 00010010000
Output Voltage Adjustment Using the PMBus
The VOUT_SCALE_LOOP parameter is important for a
number of PMBus commands related to output voltage
trimming, margining, over/under voltage protection and the
PGOOD thresholds. The output voltage of the module is set
as the combination of the voltage divider formed by RTrim
and a 20k upper divider resistor inside the module, and the
internal reference voltage of the module. The reference
voltage VREF is nominally set at 600mV, and the output
regulation voltage is then given by
REFOUT V
RTrim
RTrim
V
20000
Hence the module output voltage is dependent on the value
of RTrim which is connected external to the module. The
information on the output voltage divider ratio is conveyed
to the module through the VOUT_SCALE_LOOP parameter
which is calculated as follows:
RTrim
RTrim
LOOPSCALEVOUT
20000
__
The VOUT_SCALE_LOOP parameter is specified using the
“Linear” format and two bytes. The upper five bits [7:3] of the
high byte are used to set the exponent which is fixed at –9
(decimal). The remaining three bits of the high byte [2:0] and
the eight bits of the lower byte are used for the mantissa.
The default value of the mantissa is 00100000000
corresponding to 256 (decimal), corresponding to a divider
ratio of 0.5. The maximum value of the mantissa is 512
corresponding to a divider ratio of 1. Note that the
resolution of the VOUT_SCALE_LOOP command is 0.2%.
When PMBus commands are used to trim or margin the
output voltage, the value of VREF is what is changed inside
the module, which in turn changes the regulated output
voltage of the module.
The nominal output voltage of the module can be adjusted
with a minimum step size of 0.4% over a ±25% range from
nominal using the VOUT_TRIM command over the PMBus.
The VOUT_TRIM command is used to apply a fixed offset
voltage to the output voltage command value using the
“Linear” mode with the exponent fixed at –10 (decimal). The
value of the offset voltage is given by
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3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 3A Output Current
March 20, 2019 ©2016 General Electric Company. All rights reserved. Page 21
10
)( 2_
TRIMVOUTV offsetOUT
This offset voltage is added to the voltage set through the
divider ratio and nominal VREF to produce the trimmed output
voltage. The valid range in two’s complement for this
command is –4000h to 3FFFh. The high order two bits of
the high byte must both be either 0 or 1. If a value outside of
the +/-25% adjustment range is given with this command,
the module will set it’s output voltage to the nominal value
(as if VOUT_TRIM had been set to 0), assert SMBALRT#, set
the CML bit in STATUS_BYTE and the invalid data bit in
STATUS_CML.
Output Voltage Margining Using the PMBus
The module can also have its output voltage margined via
PMBus commands. The command VOUT_MARGIN_HIGH sets
the margin high voltage, while the command
VOUT_MARGIN_LOW sets the margin low voltage. Both the
VOUT_MARGIN_HIGH and VOUT_MARGIN_LOW commands
use the “Linear” mode with the exponent fixed at –10
(decimal). Two bytes are used for the mantissa with the
upper bit [7] of the high byte fixed at 0. The actual margined
output voltage is a combination of the VOUT_MARGIN_HIGH
or VOUT_MARGIN_LOW and the VOUT_TRIM values as shown
below.
10
)(
2)___(
TRIMVOUTHIGHMARGINVOUT
VMHOUT
10
)(
2)___(
TRIMVOUTLOWMARGINVOUT
VMLOUT
Note that the sum of the margin and trim voltages cannot be
outside the ±25% window around the nominal output
voltage. The data associated with VOUT_MARGIN_HIGH and
VOUT_MARGIN_LOW can be stored to non-volatile memory
using the STORE_DEFAULT_ALL command.
The module is commanded to go to the margined high or low
voltages using the OPERATION command. Bits [5:2] are used
to enable margining as follows:
00XX : Margin Off
0101 : Margin Low (Ignore Fault)
0110 : Margin Low (Act on Fault)
1001 : Margin High (Ignore Fault)
1010 : Margin High (Act on Fault)
PMBus Adjustable Overcurrent Warning
The module can provide an overcurrent warning via the
PMBus. The threshold for the overcurrent warning can be set
using the parameter IOUT_OC_WARN_LIMIT. This command
uses the “Linear” data format with a two byte data word
where the upper five bits [7:3] of the high byte represent the
exponent and the remaining three bits of the high byte [2:0]
and the eight bits in the low byte represent the mantissa.
The exponent is fixed at –1 (decimal). The upper six bits of the
mantissa are fixed at 0 while the lower five bits are
programmable. For production codes after April 2013, the
value for IOUT_OC_WARN_LIMIT will be fixed at 5.0A. For
earlier production codes the actual value for
IOUT_OC_WARN_LIMIT will vary from module to module due
to calibration during production testing. The resolution of this
warning limit is 500mA. The value of the
IOUT_OC_WARN_LIMIT can be stored to non-volatile memory
using the STORE_DEFAULT_ALL command.
Temperature Status via PMBus
The module can provide information related to temperature
of the module through the STATUS_TEMPERATURE
command. The command returns information about
whether the pre-set over temperature fault threshold and/or
the warning threshold have been exceeded.
PMBus Adjustable Output Over and Under Voltage
Protection
The module has output over and under voltage protection
capability. The PMBus command VOUT_OV_FAULT_LIMIT is
used to set the output over voltage threshold from four
possible values: 108%, 110%, 112% or 115% of the
commanded output voltage. The command
VOUT_UV_FAULT_LIMIT sets the threshold that causes an
output under voltage fault and can also be selected from
four possible values: 92%, 90%, 88% or 85%. The default
values are 112% and 88% of commanded output voltage.
Both commands use two data bytes formatted as two’s
complement binary integers. The “Linear” mode is used with
the exponent fixed to –10 (decimal) and the effective over or
under voltage trip points given by:
10
)_(
10
)_(
2)___(
2)___(
LIMITFAULTUVVOUTV
LIMITFAULTOVVOUTV
REQUVOUT
REQOVOUT
Values within the supported range for over and
undervoltage detection thresholds will be set to the nearest
fixed percentage. Note that the correct value for
VOUT_SCALE_LOOP must be set in the module for the
correct over or under voltage trip points to be calculated.
In addition to adjustable output voltage protection, the 3A
Digital PicoDLynxTM module can also be programmed for the
response to the fault. The VOUT_OV_FAULT RESPONSE and
VOUT_UV_FAULT_RESPONSE commands specify the
response to the fault. Both these commands use a single
data byte with the possible options as shown below.
1. Continue operation without interruption (Bits [7:6]
= 00, Bits [5:3] = xxx)
2. Continue for four switching cycles and then shut
down if the fault is still present, followed by no
restart or continuous restart (Bits [7:6] = 01, Bits
[5:3] = 000 means no restart, Bits [5:3] = 111
means continuous restart)
3. Immediate shut down followed by no restart or
continuous restart (Bits [7:6] = 10, Bits [5:3] = 000
means no restart, Bits [5:3] = 111 means
continuous restart).
4. Module output is disabled when the fault is present
and the output is enabled when the fault no longer
exists (Bits [7:6] = 11, Bits [5:3] = xxx).
Note that separate response choices are possible for output
over voltage or under voltage faults.
PMBus Adjustable Input Undervoltage Lockout
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nxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 3A Output Current
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The module allows adjustment of the input under voltage
lockout and hysteresis. The command VIN_ON allows setting
the input voltage turn on threshold, while the VIN_OFF
command sets the input voltage turn off threshold. For the
VIN_ON command, possible values are 2.75V, and 3V to 14V
in 0.5V steps. For the VIN_OFF command, possible values are
2.5V to 14V in 0.5V steps. If other values are entered for
either command, they will be mapped to the closest of the
allowed values.
VIN_ON must be set higher than VIN_OFF. Attempting to
write either VIN_ON lower than VIN_OFF or VIN_OFF higher
than VIN_ON results in the new value being rejected,
SMBALERT being asserted along with the CML bit in
STATUS_BYTE and the invalid data bit in STATUS_CML.
Both the VIN_ON and VIN_OFF commands use the “Linear”
format with two data bytes. The upper five bits represent the
exponent (fixed at -2) and the remaining 11 bits represent
the mantissa. For the mantissa, the four most significant bits
are fixed at 0.
Power Good
The module provides a Power Good (PGOOD) signal that is
implemented with an open-drain output to indicate that the
output voltage is within the regulation limits of the power
module. The PGOOD signal will be de-asserted to a low state
if any condition such as overtemperature, overcurrent or loss
of regulation occurs that would result in the output voltage
going outside the specified thresholds. The PGOOD
thresholds are user selectable via the PMBus (the default
values are as shown in the Feature Specifications Section).
Each threshold is set up symmetrically above and below the
nominal value. The POWER_GOOD_ON command sets the
output voltage level above which PGOOD is asserted (lower
threshold). For example, with a 1.2V nominal output voltage,
the POWER_GOOD_ON threshold can set the lower threshold
to 1.14 or 1.1V. Doing this will automatically set the upper
thresholds to 1.26 or 1.3V.
The POWER_GOOD_OFF command sets the level below
which the PGOOD command is de-asserted. This command
also sets two thresholds symmetrically placed around the
nominal output voltage. Normally, the POWER_GOOD_ON
threshold is set higher than the POWER_GOOD_OFF
threshold.
Both POWER_GOOD_ON and POWER_GOOD_OFF commands
use the “Linear” format with the exponent fixed at –10
(decimal). The two thresholds are given by
10
)_(
10
)_(
2)__(
2)__(
OFFGOODPOWERV
ONGOODPOWERV
OFFPGOODOUT
ONPGOODOUT
Both commands use two data bytes with bit [7] of the high
byte fixed at 0, while the remaining bits are r/w and used to
set the mantissa using two’s complement representation.
Both commands also use the VOUT_SCALE_LOOP parameter
so it must be set correctly. The default value of
POWER_GOOD_ON is set at 1.1035V and that of the
POWER_GOOD_OFF is set at 1.08V. The values associated
with these commands can be stored in non-volatile memory
using the STORE_DEFAULT_ALL command.
The PGOOD terminal can be connected through a pullup
resistor (suggested value 100K) to a source of 5VDC or
lower.
Measurement of Output Current, Output Voltage
and Input Voltage
The module is capable of measuring key module
parameters such as output current and voltage and input
voltage and providing this information through the PMBus
interface. Roughly every 200s, the module makes 16
measurements each of output current, voltage and input
voltage. Average values of of these 16 measurements are
then calculated and placed in the appropriate registers. The
values in the registers can then be read using the PMBus
interface.
Measuring Output Current Using the PMBus
The module measures current by using the inductor winding
resistance as a current sense element. The inductor winding
resistance is then the current gain factor used to scale the
measured voltage into a current reading. This gain factor is
the argument of the IOUT_CAL_GAIN command, and
consists of two bytes in the linear data format. The exponent
uses the upper five bits [7:3] of the high data byte in two-s
complement format and is fixed at –15 (decimal). The
remaining 11 bits in two’s complement binary format
represent the mantissa.
The current measurement accuracy is also improved by
each module being calibrated during manufacture with the
offset in the current reading. The IOUT_CAL_OFFSET
command is used to store and read the current offset. The
argument for this command consists of two bytes
composed of a 5-bit exponent (fixed at -4d) and a 11-bit
mantissa. This command has a resolution of 62.5mA and a
range of -4000mA to +3937.5mA. During manufacture,
each module is calibrated by measuring and storing the
current gain factor and offset into non-volatile storage.
The READ_IOUT command provides module average output
current information. This command only supports positive or
current sourced from the module. If the converter is sinking
current a reading of 0 is provided. The READ_IOUT
command returns two bytes of data in the linear data
format. The exponent uses the upper five bits [7:3] of the
high data byte in two-s complement format and is fixed at –
4 (decimal). The remaining 11 bits in two’s complement
binary format represent the mantissa with the 11th bit fixed
at 0 since only positive numbers are considered valid.
Note that the current reading provided by the module is not
corrected for temperature. The temperature corrected
current reading for module temperature TModule can be
estimated using the following equation
, _
󰇟󰇛 
󰇜 . 󰇠
where IOUT_CORR is the temperature corrected value of the
current measurement, IREAD_OUT is the module current
measurement value, TIND is the temperature of the inductor
winding on the module. Since it may be difficult to measure
GE Data Sheet
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nxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 3A Output Current
March 20, 2019 ©2016 General Electric Company. All rights reserved. Page 23
TIND, it may be approximated by an estimate of the module
temperature.
Measuring Output Voltage Using the PMBus
The module can provide output voltage information using the
READ_VOUT command. The command returns two bytes of
data all representing the mantissa while the exponent is fixed
at -10 (decimal).
During manufacture of the module, offset and gain
correction values are written into the non-volatile memory of
the module. The command VOUT_CAL_OFFSET can be used
to read and/or write the offset (two bytes consisting of a 16-
bit mantissa in two’s complement format) while the exponent
is always fixed at -10 (decimal). The allowed range for this
offset correction is -125 to 124mV. The command
VOUT_CAL_GAIN can be used to read and/or write the gain
correction - two bytes consisting of a five-bit exponent (fixed
at -8) and a 11-bit mantissa. The range of this correction
factor is -0.125V to +0.121V, with a resolution of 0.004V. The
corrected output voltage reading is then given by:
OFFSETCALVOUT
GAINCALVOUTInitialV
FinalV
OUT
OUT
__
)]__1()([
)(
Measuring Input Voltage Using the PMBus
The module can provide output voltage information using the
READ_VIN command. The command returns two bytes of
data in the linear format. The upper five bits [7:3] of the high
data form the two’s complement representation of the
exponent which is fixed at –5 (decimal). The remaining 11 bits
are used for two’s complement representation of the
mantissa, with the 11th bit fixed at zero since only positive
numbers are valid.
During module manufacture, offset and gain correction
values are written into the non-volatile memory of the
module. The command VIN_CAL_OFFSET can be used to read
and/or write the offset - two bytes consisting of a five-bit
exponent (fixed at -5) and a11-bit mantissa in two’s
complement format. The allowed range for this offset
correction is -2 to 1.968V, and the resolution is 32mV. The
command VIN_CAL_GAIN can be used to read and/or write
the gain correction - two bytes consisting of a five-bit
exponent (fixed at -8) and a 11-bit mantissa. The range of this
correction factor is -0.125V to +0.121V, with a resolution of
0.004V. The corrected output voltage reading is then given
by:
OFFSETCALVIN
GAINCALVINInitialV
FinalV
IN
IN
__
)]__1()([
)(
Reading the Status of the Module using the PMBus
The module supports a number of status information
commands implemented in PMBus. However, not all features
are supported in these commands. A 1 in the bit position
indicates the fault that is flagged.
STATUS_BYTE : Returns one byte of information with a
summary of the most critical device faults.
Bit
Position Flag Default
Value
7 X 0
6 OFF 0
5 VOUT Overvoltage 0
4 IOUT Overcurrent 0
3 VIN Undervoltage 0
2 Temperature 0
1 CML (Comm. Memory Fault) 0
0 None of the above 0
STATUS_WORD : Returns two bytes of information with a
summary of the module’s fault/warning conditions.
Low Byte
Bit
Position Flag Default
Value
7 X 0
6 OFF 0
5 VOUT Overvoltage 0
4 IOUT Overcurrent 0
3 VIN Undervoltage 0
2 Temperature 0
1 CML (Comm. Memory Fault) 0
0 None of the above 0
High Byte
Bit
Position Flag Default
Value
7 VOUT fault or warning 0
6 IOUT fault or warning 0
5 X 0
4 X 0
3 POWER_GOOD# (is negated) 0
2 X 0
1 X 0
0 X 0
STATUS_VOUT : Returns one byte of information relating to
the status of the module’s output voltage related faults.
Bit
Position Flag Default
Value
7 VOUT OV Fault 0
6 X 0
5 X 0
4 VOUT UV Fault 0
3 X 0
2 X 0
1 X 0
0 X 0
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nxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 3A Output Current
March 20, 2019 ©2016 General Electric Company. All rights reserved. Page 24
STATUS_IOUT : Returns one byte of information relating to
the status of the module’s output voltage related faults.
Bit
Position Flag Default
Value
7 IOUT OC Fault 0
6 X 0
5 IOUT OC Warning 0
4 X 0
3 X 0
2 X 0
1 X 0
0 X 0
STATUS_TEMPERATURE : Returns one byte of information
relating to the status of the module’s temperature related
faults.
Bit
Position Flag Default
Value
7 OT Fault 0
6 OT Warning 0
5 X 0
4 X 0
3 X 0
2 X 0
1 X 0
0 X 0
STATUS_CML : Returns one byte of information relating to the
status of the module’s communication related faults.
Bit
Position Flag Default
Value
7 Invalid/Unsupported Command 0
6 Invalid/Unsupported Command 0
5 Packet Error Check Failed 0
4 X 0
3 X 0
2 X 0
1 Other Communication Fault 0
0 X 0
MFR_VIN_MIN : Returns minimum input voltage as two data
bytes of information in Linear format (upper five bits are
exponent – fixed at -2, and lower 11 bits are mantissa in
two’s complement format – fixed at 12)
MFR_VOUT_MIN : Returns minimum output voltage as two
data bytes of information in Linear format (upper five bits are
exponent – fixed at -10, and lower 11 bits are mantissa in
two’s complement format – fixed at 614)
MFR_SPECIFIC_00 : Returns information related to the type of
module and revision number. Bits [7:2] in the Low Byte
indicate the module type (001000 corresponds to the PDT003
series of module). Bits 1:0 in the High Byte are used to
indicate the manufacturer ID, with 00 reserved for GE.
Low Byte
Bit
Position Flag Default
Value
7:2 Module Name 001000
1:0 Reserved 10
High Byte
Bit
Position Flag Default
Value
7:0 Module Revision Number None
1:0 Reserved 00
GE Data Sheet
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3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 3A Output Current
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Summary of Supported PMBus Commands
Please refer to the PMBus 1.1 specification for more details of these commands.
Table 6
Hex
Code Command Brief Description Non-Volatile
Memory Storage
01 OPERATION
Turn Module on or off. Also used to margin the output voltage
Format Unsigned Binary
Bit Position 7 6 5 4 3 2 1 0
Access r/w r r/w r/w r/w r/w r r
Function On X Margin X X
Default Value 0 0 0 0 0 0 X X
02 ON_OFF_CONFIG
Configures the ON/OFF functionality as a combination of analog ON/OFF pin
and PMBus commands
Format Unsigned Binary
Bit Position 7 6 5 4 3 2 1 0
Access r r r r/w r/w r/w r/w r
Function X X X pu cmd cpr pol cpa
Default Value 0 0 0 1 0 1 1 1
YES
03 CLEAR_FAULTS
Clear any fault bits that may have been set, also releases the SMBALERT# signal
if the device has been asserting it.
10 WRITE_PROTECT
Used to control writing to the module via PMBus. Copies the current register
setting in the module whose command code matches the value in the data byte
into non-volatile memory (EEPROM) on the module
Format Unsigned Binary
Bit Position 7 6 5 4 3 2 1 0
Access r/w r/w r/w xxxx x
Function bit7 bit6 bit5 X X X X X
Default Value 0 0 0 X X X X X
Bit5: 0 – Enables all writes as permitted in bit6 or bit7
1 – Disables all writes except the WRITE_PROTECT, OPERATION
and ON_OFF_CONFIG (bit 6 and bit7 must be 0)
Bit 6: 0 – Enables all writes as permitted in bit5 or bit7
1 – Disables all writes except for the WRITE_PROTECT and
OPERATION commands (bit5 and bit7 must be 0)
Bit7: 0 – Enables all writes as permitted in bit5 or bit6
1 – Disables all writes except for the WRITE_PROTECT command
(bit5 and bit6 must be 0)
YES
11 STORE_DEFAULT_ALL
Copies all current register settings in the module into non-volatile memory
(EEPROM) on the module. Takes about 50ms for the command to execute.
12 RESTORE_DEFAULT_ALL
Restores all current register settings in the module from values in the module
non-volatile memory (EEPROM)
13 STORE_DEFAULT_CODE
Copies the current register setting in the module whose command code
matches the value in the data byte into non-volatile memory (EEPROM) on the
module
Bit Position 7 6 5 4 3 2 1 0
Access w w w wwww w
Function Command code
14 RESTORE_DEFAULT_CODE
Restores the current register setting in the module whose command code
matches the value in the data byte from the value in the module non-volatile
memory (EEPROM)
Bit Position 7 6 5 4 3 2 1 0
Access w w w wwww w
Function Command code
20 VOUT_MODE
The module has MODE set to Linear and Exponent set to -10. These values
cannot be changed
Bit Position 7 6 5 4 3 2 1 0
Access r r r rrrr r
Function Mode Exponent
Default Value 0 0 0 1 0 1 1 0
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nxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 3A Output Current
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Table 6 (continued)
Hex
Code Command Brief Description Non-Volatile
Memory Storage
22 VOUT_TRIM
Apply a fixed offset voltage to the output voltage command value
Format Linear, two’s complement binary
Bit Position 7 6 5 4 3 2 1 0
Access r/w r r/w r/w r/w r/w r/w r/w
Function High Byte
Default Value 0 0 0 0 0 0 0 0
Bit Position 7 6 5 4 3 2 1 0
Access r/w r/w r/w r/w r/w r/w r/w r/w
Function Low Byte
Default Value 0 0 0 0 0 0 0 0
YES
25 VOUT_MARGIN_HIGH
Sets the target voltage for margining the output high
Format Linear, two’s complement binary
Bit Position 7 6 5 4 3 2 1 0
Access r r/w r/w r/w r/w r/w r/w r/w
Function High Byte
Default Value 0 0 0 0 0 1 0 1
Bit Position 7 6 5 4 3 2 1 0
Access r/w r/w r/w r/w r/w r/w r/w r/w
Function Low Byte
Default Value 0 1 0 0 0 1 1 1
YES
26 VOUT_MARGIN_LOW
Sets the target voltage for margining the output low
Format Linear, two’s complement binary
Bit Position 7 6 5 4 3 2 1 0
Access r r/w r/w r/w r/w r/w r/w r/w
Function High Byte
Default Value 0 0 0 0 0 1 0 0
Bit Position 7 6 5 4 3 2 1 0
Access r/w r/w r/w r/w r/w r/w r/w r/w
Function Low Byte
Default Value 0 1 0 1 0 0 0 1
YES
29 VOUT_SCALE_LOOP
Sets the scaling of the output voltage – equal to the feedback resistor divider
ratio
Format Linear, two’s complement binary
Bit Position 7 6 5 4 3 2 1 0
Access r r r rrrr/w r/w
Function Exponent Mantissa
Default Value 1 0 1 1 1 0 0 1
Bit Position 7 6 5 4 3 2 1 0
Access r/w r/w r/w r/w r/w r/w r/w r/w
Function Mantissa
Default Value 0 0 0 0 0 0 0 0
YES
35 VIN_ON
Sets the value of input voltage at which the module turns on
Format Linear, two’s complement binary
Bit Position 7 6 5 4 3 2 1 0
Access r r r rrrr r
Function Exponent Mantissa
Default Value 1 1 1 1 0 0 0 0
Bit Position 7 6 5 4 3 2 1 0
Access r r/w r/w r/w r/w r/w r/w r/w
Function Mantissa
Default Value 0 0 0 0 1 0 1 1
YES
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nxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 3A Output Current
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Table 6 (continued)
Hex
Code Command Brief Description Non-Volatile
Memory Storage
36 VIN_OFF
Sets the value of input voltage at which the module turns off
Format Linear, two’s complement binary
Bit Position 7 6 5 4 3 2 1 0
Access r r r rrrr r
Function Exponent Mantissa
Default Value 1 1 1 1 0 0 0 0
Bit Position 7 6 5 4 3 2 1 0
Access r r/w r/w r/w r/w r/w r/w r/w
Function Mantissa
Default Value 0 0 0 0 1 0 1 0
YES
38 IOUT_CAL_GAIN
Returns the value of the gain correction term used to correct the measured
output current
Format Linear, two’s complement binary
Bit Position 7 6 5 4 3 2 1 0
Access r r r rrrr r/w
Function Exponent Mantissa
Default Value 1 0 0 0 1 0 0 V
Bit Position 7 6 5 4 3 2 1 0
Access r/w r/w r/w r/w r/w r/w r/w r/w
Function Mantissa
Default Value V: Variable based on factory calibration
YES
39 IOUT_CAL_OFFSET
Returns the value of the offset correction term used to correct the measured
output current
Format Linear, two’s complement binary
Bit Position 7 6 5 4 3 2 1 0
Access r r r r r r/w r r
Function Exponent Mantissa
Default Value 1 1 1 0 0 V 0 0
Bit Position 7 6 5 4 3 2 1 0
Access r r r/w r/w r/w r/w r/w r/w
Function Mantissa
Default Value 0 0 V: Variable based on factory calibration
YES
40 VOUT_OV_FAULT_LIMIT
Sets the voltage level for an output overvoltage fault. Exponent is fixed at -10.
Suggested value shown for 1.2Vo. Should be changed for different output
voltage. Values can be 108%, 110%, 112% or 115% of output voltage
Format Linear, two’s complement binary
Bit Position 7 6 5 4 3 2 1 0
Access r r/w r/w r/w r/w r/w r/w r/w
Function High Byte
Default Value 0 0 0 0 0 1 0 1
Bit Position 7 6 5 4 3 2 1 0
Access r/w r/w r/w r/w r/w r/w r/w r/w
Function Low Byte
Default Value 0 1 1 0 0 0 0 0
YES
41 VOUT_OV_FAULT_RESPONSE
Instructs the module on what action to take in response to a output overvoltage
fault
Format Unsigned Binary
Bit Position 7 6 5 4 3 2 1 0
Access r/w r/w r/w r/w r/w rr r
Function RSP
[1]
RSP
[0] RS[2] RS[1] RS[0] X X X
Default Value 1 1 1 1 1 1 0 0
YES
GE Data Sheet
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nxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 3A Output Current
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Table 6 (continued)
Hex
Code Command Brief Description Non-Volatile
Memory Storage
44 VOUT_UV_FAULT_LIMIT
Sets the voltage level for an output undervoltage fault. Exponent is fixed at -10.
Suggested value shown for 1.2Vo. Should be changed for different output
voltage. Values can be 92%, 90%, 88% or 85% of output voltage
Format Linear, two’s complement binary
Bit Position 7 6 5 4 3 2 1 0
Access r r/w r/w r/w r/w r/w r/w r/w
Function High Byte
Default Value 0 0 0 0 0 1 0 0
Bit Position 7 6 5 4 3 2 1 0
Access r/w r/w r/w r/w r/w r/w r/w r/w
Function Low Byte
Default Value 0 0 1 1 1 0 0 1
YES
45 VOUT_UV_FAULT_RESPONSE
Instructs the module on what action to take in response to a output
undervoltage fault
Format Unsigned Binary
Bit Position 7 6 5 4 3 2 1 0
Access r/w r/w r/w r/w r/w rr r
Function RSP
[1]
RSP
[0] RS[2] RS[1] RS[0] X X X
Default Value 0 0 0 0 0 1 0 0
YES
46 IOUT_OC_FAULT_LIMIT
Sets the output overcurrent fault level in A (cannot be changed)
Format Linear, two’s complement binary
Bit Position 7 6 5 4 3 2 1 0
Access r r r rrrr r
Function Exponent Mantissa
Default Value 1 1 1 1 1 0 0 0
Bit Position 7 6 5 4 3 2 1 0
Access r r r rrrr R
Function Mantissa
Default Value 0 0 0 0 1 0 1 1
YES
4A IOUT_OC_WARN_LIMIT
Sets the output overcurrent warning level in A
Format Linear, two’s complement binary
Bit Position 7 6 5 4 3 2 1 0
Access r r r rrrr r
Function Exponent Mantissa
Default Value 1 1 1 1 1 0 0 0
Bit Position 7 6 5 4 3 2 1 0
Access r r r/w r/w r/w r/w r/w r/w
Function Mantissa
Default Value 0 0 0 0 1 0 1 0
YES
5E POWER_GOOD_ON
Sets the output voltage level at which the PGOOD pin is asserted high
Format Linear, two’s complement binary
Bit Position 7 6 5 4 3 2 1 0
Access r r/w r/w r/w r/w r/w r/w r/w
Function High Byte
Default Value 0 0 0 0 0 1 0 0
Bit Position 7 6 5 4 3 2 1 0
Access r/w r/w r/w r/w r/w r/w r/w r/w
Function Low Byte
Default Value 0 1 1 0 1 0 1 0
YES
GE Data Sheet
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y
nxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 3A Output Current
March 20, 2019 ©2016 General Electric Company. All rights reserved. Page 29
Table 6 (continued)
Table 6 (continued)
Hex
Code Command Brief Description Non-Volatile
Memory Storage
5F POWER_GOOD_OFF
Sets the output voltage level at which the PGOOD pin is de-asserted low
Format Linear, two’s complement binary
Bit Position 7 6 5 4 3 2 1 0
Access r r/w r/w r/w r/w r/w r/w r/w
Function High Byte
Default Value 0 0 0 0 0 1 0 0
Bit Position 7 6 5 4 3 2 1 0
Access r/w r/w r/w r/w r/w r/w r/w r/w
Function Low Byte
Default Value 0 1 0 1 0 0 1 0
YES
61 TON_RISE
Sets the rise time of the output voltage during startup
Format Linear, two’s complement binary
Bit Position 7 6 5 4 3 2 1 0
Access r r r rrrr r/w
Function Exponent Mantissa
Default Value 1 1 1 0 0 0 0 0
Bit Position 7 6 5 4 3 2 1 0
Access r/w r/w r/w r/w r/w r/w r/w r/w
Function Mantissa
Default Value 0 0 1 0 1 0 1 1
YES
78 STATUS_BYTE
Returns one byte of information with a summary of the most critical module
faults
Format Unsigned Binary
Bit Position 7 6 5 4 3 2 1 0
Access r r r rrrr r
Flag X OFF
VOUT
_OV
IOUT_
OC
VIN_U
V TEMP CML OTHE
R
Default Value 0 0 0 0 0 0 0 0
79 STATUS_WORD
Returns two bytes of information with a summary of the module’s fault/warning
conditions
Format Unsigned Binary
Bit Position 7 6 5 4 3 2 1 0
Access r r r rrrr r
Flag VOUT IOUT_
OC X X
PGOO
D X X X
Default Value 0 0 0 0 0 0 0 0
Bit Position 7 6 5 4 3 2 1 0
Access r r r rrrr r
Flag X OFF VOUT
_OV
IOUT_
OC
VIN_U
V TEMP CML OTHE
R
Default Value 0 0 0 0 0 0 0 0
7A STATUS_VOUT
Returns one byte of information with the status of the module’s output voltage
related faults
Format Unsigned Binary
Bit Position 7 6 5 4 3 2 1 0
Access r r r r rrr r
Flag VOUT_OV X X VOUT_UV X X X X
Default Value 0 0 0 0 0 0 0 0
7B STATUS_IOUT
Returns one byte of information with the status of the module’s output current
related faults
Format Unsigned Binary
Bit Position 7 6 5 4 3 2 1 0
Access r r r r r r r r
Flag IOUT_OC X IOUT_OC_WARN X X X X X
Default Value 0 0 0 0 0 0 0 0
GE Data Sheet
3A Di
g
ital PicoDL
y
nxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 3A Output Current
March 20, 2019 ©2016 General Electric Company. All rights reserved. Page 30
Hex
Code Command Brief Description Non-Volatile
Memory Storage
7D STATUS_TEMPERATURE
Returns one byte of information with the status of the module’s temperature
related faults
Format Unsigned Binary
Bit Position 7 6 5 4 3 2 1 0
Access r r r rrrr R
Flag OT_FAULT OT_WARN X X X X X X
Default Value 0 0 0 0 0 0 0 0
7E STATUS_CML
Returns one byte of information with the status of the module’s communication
related faults
Format Unsigned Binary
Bit Position 7 6 5 4 3 2 1 0
Access r r r rrr r r
Flag Invalid
Command
Invalid
Data
PEC
Fail X X X
Other
Comm
Fault
X
Default Value 0 0 0 0 0 0 0 0
88 READ_VIN
Returns the value of the input voltage applied to the module
Format Linear, two’s complement binary
Bit Position 7 6 5 4 3 2 1 0
Access r r r rrrr r
Function Exponent Mantissa
Default Value 1 1 0 1 1 0 0 0
Bit Position 7 6 5 4 3 2 1 0
Access r r r rrrr r
Function Mantissa
Default Value 0 0 0 0 0 0 0 0
8B READ_VOUT
Returns the value of the output voltage of the module
Format Linear, two’s complement binary
Bit Position 7 6 5 4 3 2 1 0
Access r r r rrrr r
Function Mantissa
Default Value 0 0 0 0 0 0 0 0
Bit Position 7 6 5 4 3 2 1 0
Access r r r rrrr r
Function Mantissa
Default Value 0 0 0 0 0 0 0 0
8C READ_IOUT
Returns the value of the output current of the module
Format Linear, two’s complement binary
Bit Position 7 6 5 4 3 2 1 0
Access r r r rrrr r
Function Exponent Mantissa
Default Value 1 1 1 0 0 0 0 0
Bit Position 7 6 5 4 3 2 1 0
Access r r r rrrr r
Function Mantissa
Default Value 0 0 0 0 0 0 0 0
98 PMBUS_REVISION
Returns one byte indicating the module is compliant to PMBus Spec. 1.1 (read
only)
Format Unsigned Binary
Bit Position 7 6 5 4 3 2 1 0
Access r r r rrrr r
Default Value 0 0 0 1 0 0 0 1
YES
GE Data Sheet
3A Di
g
ital PicoDL
y
nxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 3A Output Current
March 20, 2019 ©2016 General Electric Company. All rights reserved. Page 31
Table 6 (continued)
Hex
Code Command Brief Description Non-Volatile
Memory Storage
A0 MFR_VIN_MIN
Returns the minimum input voltage the module is specified to operate at (read only)
Format Linear, two’s complement binary
Bit Position 7 6 5 4 3 2 1 0
Access r r r rrrr r
Function Exponent Mantissa
Default Value 1 1 1 1 0 0 0 0
Bit Position 7 6 5 4 3 2 1 0
Access r r r rrrr r
Function Mantissa
Default Value 0 0 0 0 1 1 0 0
YES
A4 MFR_VOUT_MIN
Returns the minimum output voltage possible from the module (read only)
Format Linear, two’s complement binary
Bit Position 7 6 5 4 3 2 1 0
Access r r r rrrr r
Function Mantissa
Default Value 0 0 0 0 0 0 1 0
Bit Position 7 6 5 4 3 2 1 0
Access r r r rrrr r
Function Mantissa
Default Value 0 1 1 0 0 1 1 0
YES
D0 MFR_SPECIFIC_00
Returns module name information (read only)
Format Unsigned Binary
Bit Position 7 6 5 4 3 2 1 0
Access r r r rrrr r
Function Reserved
Default Value 0 0 0 0 0 0 0 0
Bit Position 7 6 5 4 3 2 1 0
Access r r r rrrr r
Function Module Name Reserved
Default Value 0 0 1 0 0 0 1 0
YES
D4 VOUT_CAL_OFFSET
Applies an offset to the READ_VOUT command results to calibrate out offset errors in
module measurements of the output voltage (between -125mV and +124mV)
Format Linear, two’s complement binary
Bit Position 7 6 5 4 3 2 1 0
Access r/w r r rrrr r
Function Mantissa
Default Value V 0 0 0 0 0 0 0
Bit Position 7 6 5 4 3 2 1 0
Access r r/w r/w r/w r/w r/w r/w r/w
Function Mantissa
Default Value V V V V V V V V
YES
D5 VOUT_CAL_GAIN
Applies a gain correction to the READ_VOUT command results to calibrate out gain
errors in module measurements of the output voltage (between -0.125 and 0.121)
Format Linear, two’s complement binary
Bit Position 7 6 5 4 3 2 1 0
Access r r r r r r/w r r
Function Exponent Mantissa
Default Value 1 1 0 0 0 0 0 V
Bit Position 7 6 5 4 3 2 1 0
Access r r r r/w r/w r/w r/w r/w
Function Mantissa
Default Value V V V V V V V V
YES
GE Data Sheet
3A Di
g
ital PicoDL
y
nxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 3A Output Current
March 20, 2019 ©2016 General Electric Company. All rights reserved. Page 32
Table 6 (continued)
Hex
Code Command Brief Description Non-Volatile Memory
Storage
D6 VIN_CAL_OFFSET
Applies an offset correction to the READ_VIN command results to calibrate out offset
errors in module measurements of the input voltage (between -2V and +1.968V)
Format Linear, two’s complement binary
Bit Position 7 6 5 4 3 2 1 0
Access r r r r r r/w r r
Function Exponent Mantissa
Default Value 1 1 0 1 V 0 0 V
Bit Position 7 6 5 4 3 2 1 0
Access r r r/w r/w r/w r/w r/w r/w
Function Mantissa
Default Value 0 0 V V V V V V
YES
D7 VIN_CAL_GAIN
Applies a gain correction to the READ_VIN command results to calibrate out gain
errors in module measurements of the input voltage (between -0.125 and 0.121)
Format Linear, two’s complement binary
Bit Position 7 6 5 4 3 2 1 0
Access r r r r r r/w r r
Function Exponent Mantissa
Default Value 1 1 0 0 V 0 0 V
Bit Position 7 6 5 4 3 2 1 0
Access r r r r/w r/w r/w r/w r/w
Function Mantissa
Default Value 0 0 0 V V V V V
YES
GE
Data Sheet
3A Di
g
ital PicoDL
y
nx
TM
: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 3A Output Current
March 20, 2019 ©2016 General Electric Company. All rights reserved. Page 33
Thermal Considerations
Power modules operate in a variety of thermal environments;
however, sufficient cooling should always be provided to help
ensure reliable operation.
Considerations include ambient temperature, airflow, module
power dissipation, and the need for increased reliability. A
reduction in the operating temperature of the module will
result in an increase in reliability. The thermal data
presented here is based on physical measurements taken in
a wind tunnel. The test set-up is shown in Figure 49. The
preferred airflow direction for the module is in Figure 50.
A
ir
flow
x
Power Module
Wind Tunnel
PWBs
12.7_
(0.50)
76.2_
(3.0)
Probe Location
for measuring
airflow and
ambient
temperature
25.4_
(1.0)
Figure 49. Thermal Test Setup.
The thermal reference points, T
ref
used in the specifications
are also shown in Figure 50. For reliable operation the
temperatures at these points should not exceed 120°C. The
output power of the module should not exceed the rated
power of the module (Vo,set x Io,max).
Please refer to the Application Note “Thermal
Characterization Process For Open-Frame Board-Mounted
Power Modules” for a detailed discussion of thermal aspects
including maximum device temperatures.
Figure 50. Preferred airflow direction and location of hot-
spot of the module (Tref).
GE Data Sheet
3A Di
g
ital PicoDL
y
nxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 3A Output Current
March 20, 2019 ©2016 General Electric Company. All rights reserved. Page 34
Shock and Vibration
The ruggedized (-D version) of the modules are designed to withstand elevated levels of shock and vibration to be able to operate in
harsh environments. The ruggedized modules have been successfully tested to the following conditions:
Non operating random vibration:
Random vibration tests conducted at 25C, 10 to 2000Hz, for 30 minutes each level, starting from 30Grms (Z axis) and up to 50Grms
(Z axis). The units were then subjected to two more tests of 50Grms at 30 minutes each for a total of 90 minutes.
Operating shock to 40G per Mil Std. 810G, Method 516.4 Procedure I:
The modules were tested in opposing directions along each of three orthogonal axes, with waveform and amplitude of the shock
impulse characteristics as follows:
All shocks were half sine pulses, 11 milliseconds (ms) in duration in all 3 axes.
Units were tested to the Functional Shock Test of MIL-STD-810, Method 516.4, Procedure I - Figure 516.4-4. A shock magnitude of
40G was utilized. The operational units were subjected to three shocks in each direction along three axes for a total of eighteen
shocks.
Operating vibration per Mil Std 810G, Method 514.5 Procedure I:
The ruggedized (-D version) modules are designed and tested to vibration levels as outlined in MIL-STD-810G, Method 514.5, and
Procedure 1, using the Power Spectral Density (PSD) profiles as shown in Table 1 and Table 2 for all axes. Full compliance with
performance specifications was required during the performance test. No damage was allowed to the module and full compliance
to performance specifications was required when the endurance environment was removed. The module was tested per MIL-STD-
810, Method 514.5, Procedure I, for functional (performance) and endurance random vibration using the performance and
endurance levels shown in Table 7 and Table 8 for all axes. The performance test has been split, with one half accomplished before
the endurance test and one half after the endurance test (in each axis). The duration of the performance test was at least 16
minutes total per axis and at least 120 minutes total per axis for the endurance test. The endurance test period was 2 hours
minimum per axis.
Table 7: Performance Vibration Qualification - All Axes
Frequency (Hz) PSD Level
(G2/Hz) Frequency (Hz) PSD Level
(G2/Hz) Frequency (Hz) PSD Level
(G2/Hz)
10 1.14E-03 170 2.54E-03 690 1.03E-03
30 5.96E-03 230 3.70E-03 800 7.29E-03
40 9.53E-04 290 7.99E-04 890 1.00E-03
50 2.08E-03 340 1.12E-02 1070 2.67E-03
90 2.08E-03 370 1.12E-02 1240 1.08E-03
110 7.05E-04 430 8.84E-04 1550 2.54E-03
130 5.00E-03 490 1.54E-03 1780 2.88E-03
140 8.20E-04 560 5.62E-04 2000 5.62E-04
Table 8: Endurance Vibration Qualification - All Axes
Frequency (Hz) PSD Level
(G2/Hz) Frequency (Hz) PSD Level
(G2/Hz) Frequency (Hz) PSD Level
(G2/Hz)
10 0.00803 170 0.01795 690 0.00727
30 0.04216 230 0.02616 800 0.05155
40 0.00674 290 0.00565 890 0.00709
50 0.01468 340 0.07901 1070 0.01887
90 0.01468 370 0.07901 1240 0.00764
110 0.00498 430 0.00625 1550 0.01795
130 0.03536 490 0.01086 1780 0.02035
140 0.0058 560 0.00398 2000 0.00398
GE Data Sheet
3A Di
g
ital PicoDL
y
nxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 3A Output Current
March 20, 2019 ©2016 General Electric Company. All rights reserved. Page 35
Example Application Circuit
Requirements:
Vin: 12V
Vout: 1.8V
Iout: 2.25A max., worst case load transient is from 1.5A to 2.25A
Vout: 1.5% of Vout (27mV) for worst case load transient
Vin, ripple 1.5% of Vin (180mV, p-p)
CI1 Decoupling cap - 1x0.047F/16V ceramic capacitor (e.g. Murata LLL185R71C473MA01)
CI2 1x22F/16V ceramic capacitor (e.g. Murata GRM32ER61C226KE20)
CI3 470F/16V bulk electrolytic
CO1 Decoupling cap - 1x0.047F/16V ceramic capacitor (e.g. Murata LLL185R71C473MA01)
CO2 -
CO3 1x330uF
CTune 2200pF ceramic capacitor (can be 1206, 0805 or 0603 size)
RTune 220 ohms SMT resistor (can be 1206, 0805 or 0603 size)
RTrim 10k SMT resistor (can be 1206, 0805 or 0603 size, recommended tolerance of 0.1%)
Note: The DATA, CLK and SMBALRT pins do not have any pull-up resistors inside the module. Typically, the SMBus master
controller will have the pull-up resistors as well as provide the driving source for these signals.
RADDR0
DAT
A
VS-
RADDR1
GND
Vin+
CI3 CO3
A
DDR0
VOUT
VS+
GND
TRIM
CTUNE
RTUNE
RTrim
V
IN
CO1
CI1
Vout+
ON/OFF
SEQ
SMBALRT#
MODULE
PGOOD
ADDR1
SIG_GND
SYNC
CI2 CO2
CLK
GE
Data Sheet
3A Di
g
ital PicoDL
y
nx
TM
: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 3A Output Current
March 20, 2019 ©2016 General Electric Company. All rights reserved. Page 36
Mechanical Outline
Dimensions are in millimeters and (inches).
Tolerances: x.x mm 0.5 mm (x.xx in. 0.02 in.) [unless otherwise indicated]
x.xx mm 0.25 mm (x.xxx in 0.010 in.)
PIN FUNCTION PIN FUNCTION
1 ON/OFF 10 PGOOD
2 VIN 11
SYNC
1
3 GND 12 VS-
4 VOUT 13 SIG. GND
5 VS+ (SENSE) 14 SMBALERT#
6 TRIM 15 DATA
7 GND 16 ADDR0
8 CLK 17 ADDR1
9 SEQ
PIN 7
1
If unused, connect to Ground.
GE Data Sheet
3A Di
g
ital PicoDL
y
nxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 3A Output Current
March 20, 2019 ©2016 General Electric Company. All rights reserved. Page 37
Recommended Pad Layout
Dimensions are in millimeters and (inches).
Tolerances: x.x mm 0.5 mm (x.xx in. 0.02 in.) [unless otherwise indicated]
x.xx mm 0.25 mm (x.xxx in 0.010 in.)
2 If unused, connect to Ground
PIN FUNCTION PIN FUNCTION
1 ON/OFF 10 PGOOD
2 VIN 11 SYNC2
3 GND 12 VS-
4 VOUT 13 SIG_GND
5 VS+ (SENSE) 14 SMBALERT#
6 TRIM 15 DATA
7 GND 16 ADDR0
8 CLK 17 ADDR1
9 SEQ
7
GE
Data Sheet
3A Di
g
ital PicoDL
y
nx
TM
: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 3A Output Current
March 20, 2019 ©2016 General Electric Company. All rights reserved. Page 38
Packaging Details
The 12V Digital PicoDLynx
TM
3A modules are supplied in tape & reel as standard. Modules are shipped in quantities of 200 modules
per reel.
All Dimensions are in millimeters and (in inches).
Reel Dimensions:
Outside Dimensions: 330.2 mm (13.00)
Inside Dimensions: 177.8 mm (7.00”)
Tape Width: 24.00 mm (0.945”)
GE
Data Sheet
3A Di
g
ital PicoDL
y
nx
TM
: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 3A Output Current
March 20, 2019 ©2016 General Electric Company. All rights reserved. Page 39
Surface Mount Information
Pick and Place
The 3A Digital PicoDLynx
TM
modules use an open frame
construction and are designed for a fully automated
assembly process. The modules are fitted with a label
designed to provide a large surface area for pick and place
operations. The label meets all the requirements for surface
mount processing, as well as safety standards, and is able to
withstand reflow temperatures of up to 300
o
C. The label also
carries product information such as product code, serial
number and the location of manufacture.
Nozzle Recommendations
The module weight has been kept to a minimum by using
open frame construction. Variables such as nozzle size, tip
style, vacuum pressure and placement speed should be
considered to optimize this process. The minimum
recommended inside nozzle diameter for reliable operation is
3mm. The maximum nozzle outer diameter, which will safely
fit within the allowable component spacing, is 7 mm.
Bottom Side / First Side Assembly
Only the -D version of this module can be placed at the
bottom side of the customer board. No additional glue or
adhesive is required is required to hold the module during the
top side reflow process
Lead Free Soldering
The 12VDigital PicoDLynx
TM
3A modules are lead-free (Pb-
free) and RoHS compliant and are both forward and
backward compatible in a Pb-free and a SnPb soldering
process. Failure to observe the instructions below may result
in the failure of or cause damage to the modules and can
adversely affect long-term reliability.
Pb-free Reflow Profile
Power Systems will comply with J-STD-020 Rev. C
(Moisture/Reflow Sensitivity Classification for Nonhermetic
Solid State Surface Mount Devices) for both Pb-free solder
profiles and MSL classification procedures. This standard
provides a recommended forced-air-convection reflow
profile based on the volume and thickness of the package
(table 5-2). The suggested Pb-free solder paste is Sn/Ag/Cu
(SAC). The recommended linear reflow profile using Sn/Ag/Cu
solder is shown in Fig. 51. Soldering outside of the
recommended profile requires testing to verify results and
performance.
It is recommended that the pad layout include a test pad
where the output pin is in the ground plane. The
thermocouple should be attached to this test pad since this
will be the coolest solder joints. The temperature of this point
should be:
Maximum peak temperature is 260 C.
Minimum temperature is 235 C.
Dwell time above 217 C: 60 seconds minimum Dwell time
above 235 C: 5 to 15 second
MSL Rating
The 3A Digital PicoDLynx
TM
modules have a MSL rating of 2a.
Storage and Handling
The recommended storage environment and handling
procedures for moisture-sensitive surface mount packages
is detailed in J-STD-033 Rev. B (Handling, Packing, Shipping
and Use of Moisture/Reflow Sensitive Surface Mount
Devices). Moisture barrier bags (MBB) with desiccant are
required for MSL ratings of 2 or greater. These sealed
packages should not be broken until time of use. Once the
original package is broken, the floor life of the product at
conditions of 30°C and 60% relative humidity varies
according to the MSL rating (see J-STD-033A). The shelf life
for dry packed SMT packages will be a minimum of 12
months from the bag seal date, when stored at the following
conditions: < 40° C, < 90% relative humidity.
Figure 51. Recommended linear reflow profile using
Sn/Ag/Cu solder.
Post Solder Cleaning and Drying Considerations
Post solder cleaning is usually the final circuit-board
assembly process prior to electrical board testing. The result
of inadequate cleaning and drying can affect both the
reliability of a power module and the testability of the
finished circuit-board assembly. For guidance on
appropriate soldering, cleaning and drying procedures, refer
to Board Mounted Power Modules: Soldering and Cleaning
Application Note (AN04-001).
GE Data Sheet
3A Di
g
ital PicoDL
y
nxTM: Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 3A Output Current
Contact Us
For more information, call us at
USA/Canada:
+1 888 546 3243, or +1 972 244 9288
Asia-Pacific:
+86.021.54279977*808
Europe, Middle-East and Africa:
+49.89.878067-280
www.gecriticalpower.com
GE Critical Power reserves the right to make changes to the product(s) or information contained herein without notice, and no
liability is assumed as a result of their use or application. No rights under any patent accompany the sale of any such product(s)
or information.
March 20, 2019 ©2016 General Electric Company. All International rights reserved. Version 1.4
Ordering Information
Please contact your GE Sales Representative for pricing, availability and optional features.
Table 9. Device Codes
Device Code Input
Voltage Range
Output
Voltage
Output
Current
On/Off
Logic Sequencing Comcodes
PDT003A0X3-SRZ 3 – 14.4Vdc 0.45 – 5.5Vdc 3A Negative Yes CC109159546
PDT003A0X3-SRDZ 3 – 14.4Vdc 0.45 – 5.5Vdc 3A Negative Yes 150021796
PDT003A0X43-SRZ 3 – 14.4Vdc 0.45 – 5.5Vdc 3A Positive Yes CC109159554
-Z refers to RoHS compliant parts
Table 10. Coding Scheme
GE Digital Non-Isolated DC-DC products use technology licensed from Power-One, protected by US patents: US20040246754, US2004090219A1, US2004093533A1, US2004123164A1,
US2004123167A1, US2004178780A1, US2004179382A1, US20050200344, US20050223252, US2005289373A1, US20060061214, US2006015616A1, US20060174145, US20070226526,
US20070234095, US20070240000, US20080052551, US20080072080, US20080186006, US6741099, US6788036, US6936999, US6949916, US7000125, US7049798, US7068021, US7080265,
US7249267, US7266709, US7315156, US7372682, US7373527, US7394445, US7456617, US7459892, US7493504, US7526660.
Outside the US the Power-One licensed technology is protected by patents: AU3287379AA, AU3287437AA, AU3290643AA, AU3291357AA, CN10371856C, CN1045261OC, CN10458656C,
CN10459360C, CN10465848C, CN11069332A, CN11124619A, CN11346682A, CN1685299A, CN1685459A, CN1685582A, CN1685583A, CN1698023A, CN1802619A, EP1561156A1, EP1561268A2,
EP1576710A1, EP1576711A1, EP1604254A4, EP1604264A4, EP1714369A2, EP1745536A4, EP1769382A4, EP1899789A2, EP1984801A2, W004044718A1, W004045042A3, W004045042C1,
W004062061 A1, W004062062A1, W004070780A3, W004084390A3, W004084391A3, W005079227A3, W005081771A3, W006019569A3, W02007001584A3, W02007094935A3
Package
Identifier
Family Sequencing
Option
Output
current
Output
voltage
On/Off
logic
Remote
Sense Options
ROHS Compliance
P D T 003A0 X 4 3 -SR -D Z
P=Pico
U=Micro
M=Mega
G=Giga
D=Dlynx
Digital
V =
DLynx
Analog.
T=with EZ
Sequence
X=without
sequencing
3A X =
progra
mmable
output
4 =
positive
No entry
=
negative
3 =
Remote
Sense
S =
Surfac
e
Mount
R =
Tape
& Reel
D = 105°C operating
ambient, 40G
operating shock as
per MIL Std 810G,
placement on
bottom side of board
Z = ROHS6