LB11847
No. 6183-1/16
LB11847
PWM Current Control Type Stepping Motor Driver
Monolithic Digital IC
The LB11847 is a driver IC for stepping motors
with PWM current control bipolar drive (fixed OFF
time). A special feature of this IC is that V
REF
voltage is constant while the current can be set in
15 steps, allowing drive of motors ranging from 1-
2 phase exciter types to 4W 1-2 phase exciter
types. The current decay pattern can also be
selected (SLOW DECAY, FAST DECAY, MIX
DECAY) to increase the decay of regenerative
current at chopping OFF, thereby improving
response characteristics. This is especially useful
for carriage and paper feed stepping motors in
printers and similar applications where high-
precision control and low vibrations are required.
Package Dimensions
unit: mm
3147B-DIP28H
Overview
SANYO : DIP28H
[LB11847]
Features
• PWM current control (fixed OFF time)
• Load current digital selector (1-2, W1-2, 2W1-2, 4W1-2 phase exciter drive possible)
• Selectable current decay pattern (SLOW DECAY, FAST DECAY, MIX DECAY)
• Simultaneous ON prevention function (feedthrough current prevention)
• Noise canceler
• Built-in thermal shutdown circuit
• Built-in logic low-voltage OFF circuit
Ordering number : EN*6183
61199RM(KI)
114
28 15
0.4
0.6
4.04.0
27.0
20.0
R1.7
8.4
1.93 1.78 1.0
12.7
11.2
Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft's
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.
SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.
Preliminary
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
LB11847
No. 6183-2/16
Absolute Maximum Ratings at Ta = 25°C
Specifications
Allowable Operating Ranges at Ta = 25°C
IOPEAK
IO max
VBB
tW ≤ 20 µs
VE
VIN
VCC
–0.3 to VCC
Parameter Symbol Conditions Ratings Unit
Motor supply voltage range 10 to 45 V
Logic supply voltage range 4.75 to 5.25 V
Reference voltage range 0.0 to 3.0 V
VBB
VCC
VREF
Parameter Symbol Conditions Ratings Unit
Motor supply voltage 50 V
Output peak current 1.75 A
Output continuous current 1.5 A
Logic supply voltage 7.0 V
Logic input voltage range V
Emitter output voltage 1.0 V
Allowable power dissipation Pd max T a = 2 5°C 3.0 W
With heat sink 20 W
Operating temperature Topr –20 to +85 °C
Storage temperature Tstg –55 to +150 °C
0–20 20406080100
5
10
15
25
20
0
Ambient temperature, Ta – ˚C
Allowable power dissipation, Pdmax – W
Pd max – Ta
IC only
10.4
1.56
20.0
3.0
With an arbitrary large heat sink
LB11847
No. 6183-3/16
Electrical Characteristics at Ta = 25°C, VBB = 45V, VCC = 5V, VREF = 1.52V
LVSD hysteresis width
IBB ON
IBB OFF
VO(sat)1
VO(sat)2
VO(sat)3
VO(sat)4
IO(leak)1
IO(leak)2
VSUS
IO = +1.0A, sink
IO = +1.5A, sink
IO = –1.0A, source
IO = –1.5A, source
VO = VBB, sink
L = 15 mH, IO = 1.5A, Guaranteed design value
ICC ON
ICC OFF
VIH
VIL
IIH
IIL
VIH = 2.0V
VIL = 0.8V
I4 = 2.0V, I3 = 2.0V, I2 = 2.0V, I1 = 2.0V
I4 = 2.0V, I3 = 2.0V, I2 = 2.0V, I1 = 2.0V
I4 = 2.0V, I3 = 2.0V, I2 = 2.0V, I1 = 0.8V
I4 = 2.0V, I3 = 2.0V, I2 = 0.8V, I1 = 2.0V
I4 = 2.0V, I3 = 2.0V, I2 = 0.8V, I1 = 0.8V
I4 = 2.0V, I3 = 0.8V, I2 = 2.0V, I1 = 2.0V
I4 = 2.0V, I3 = 0.8V, I2 = 2.0V, I1 = 0.8V
I4 = 2.0V, I3 = 0.8V, I2 = 0.8V, I 1 = 2.0V
I4 = 2.0V, I3 = 0.8V, I2 = 0.8V, I1 = 0.8V
I4 = 0.8V, I3 = 2.0V, I2 = 2.0V, I1 = 2.0V
I4 = 0.8V, I3 = 2.0V, I2 = 2.0V, I1 = 0.8V
I4 = 0.8V, I3 = 2.0V, I2 = 0.8V, I 1 = 2.0V
I4 = 0.8V, I3 = 2.0V, I2 = 0.8V, I1 = 0.8V
I4 = 0.8V, I3 = 0.8V, I2 = 2.0V, I1 = 2.0V
I4 = 0.8V, I3 = 0.8V, I2 = 2.0V, I1 = 0.8V
VE
IREF
ICR
IDECL
IMD
LVSD1
IDECH
∆LVSD
LVSD2
VREF = 1.5V
VDEC = 0.8V
VDEC = 2.0V
VO = 0V, source
min typ max
[Output Block]
Output stage supply voltage 2.3 3.5 5.0 mA
0.5 0.8 1.1 mA
Output saturation voltage 1.2 1.6 V
1.5 1.9 V
1.9 2.2 V
2.2 2.4 V
Output leak current 50 µA
–50 µA
Output sustain voltage 45 V
[Logic Block]
Logic supply voltage 19.5 26 36.5 mA
ENABLE = 2.0V 10.5 15 19.5 mA
Input voltage 2.0 V
0.8 V
Input current 100 µA
–10 µA
Sensing voltage 0.470 0.525 V
0.445 0.48 0.505 V
0.425 0.46 0.485 V
0.410 0.43 0.465 V
0.385 0.41 0.435 V
0.365 0.39 0.415 V
0.345 0.37 0.385 V
0.325 0.35 0.365 V
0.280 0.3 0.325 V
0.240 0.26 0.285 V
0.195 0.22 0.235 V
0.155 0.17 0.190 V
0.115 0.13 0.145 V
0.075 0.09 V
Reference current –0.5 µA
CR pin current CR = 1.0V –4.6 –1.0 mA
MD pin current MD = 1.0V, CR = 4.0V –5.0 µA
DECAY pin current Low –10 µA
DECAY pin current High 5 µA
Thermal shutdown temperature TSD 170 °C
Logic ON voltage 3.35 3.65 3.95 V
Logic OFF voltage 3.20 3.50 3.80 V
0.065 0.15 0.23 V
Ratings
Parameter Symbol Conditions Unit
0.50
0.190
0.30
0.100
LB11847
No. 6183-4/16
Current ratio (%)
1111 100
1110 95.65
1101 91.30
1100 86.95
1011 82.61
1010 78.26
1001 73.91
1000 69.56
0111 60.87
0110 52.17
0101 43.48
0100 34.78
0011 26.08
0010 17.39
PHASE ENABLE
HLHL
LLLH
H OFF OFF
Truth Table
Set Current Truth Table
* Current ratio (%) is the calculated set current value.
Current Decay Switching Truth Table
OUTAOUTA
IA4I
A3IA2IA1
11.5/11.5 × VREF/3.04RE = IOUT
10.5/11.5 × VREF/3.04RE = IOUT
10.0/11.5 × VREF/3.04RE = IOUT
9.5/11.5 × VREF/3.04RE = IOUT
9.0/11.5 × VREF/3.04RE = IOUT
8.5/11.5 × VREF/3.04RE = IOUT
2.0/11.5 × VREF/3.04RE = IOUT
8.0/11.5 × VREF/3.04RE = IOUT
7.0/11.5 × VREF/3.04RE = IOUT
6.0/11.5 × VREF/3.04RE = IOUT
5.0/11.5 × VREF/3.04RE = IOUT
4.0/11.5 × VREF/3.04RE = IOUT
3.0/11.5 × VREF/3.04RE = IOUT
11.0/11.5 × VREF/3.04RE = IOUT
Current decay mode DECAY pin MD pin Outpu t chopping
SLOW DECAY H L Upper-side chopping
FAST DECAY L L Dual-side chopping
4V to 1.5V input CR voltage > MD : dual-side chopping
voltage setting CR voltage < MD : upper-side chopping
MIX DECAY L
Set current IOUT
LB11847
No. 6183-5/16
Pin Assignment
Pin Function
VREF1
VREF2
OUTA
OUTA
OUTB
OUTB
VBB
IA4, IA3
IA2, IA1
IB4, IB3
IB2, IB1
VCC
1
28
2
27
3
26
4
25
5
24
6
23
7
22
8
21
9
20
10
19
11
18
12
17
13
16
14
15
VCC
PHASE1
ENABLE1
IA1
IA2
IA3
IA4
IB4
IB3
IB2
IB1
ENABLE2
PHASE2
GND
MD
VREF1
CR1
E1
DECAY1
OUTA
OUTA
OUTB
OUTB
DECAY2
E2
CR2
VREF2
VBB
LB11847
A12533
Top view
Pin number Pin name Function description
Sets the OFF time for FAST mode and SLOW mode in MIX DECAY
Setting input range: 4V to 1.5V
2 Output set current reference supply pins
13 Setting voltage range: 0V to 3V
3 CR1
12 CR2
4E1
11 E2
5 DECAY1 SLOW mode/FAST mode selector pins
10 DECAY2 SLOW DECAY: H
FAST DECAY: L
6
7
8
9
14 Output stage supply voltage pin
15 GND Ground pin
27 PHASE1
16 PHASE2
26 ENABLE1
17 ENABLE2
22, 23
24, 25 Output set current digital input pins
21, 20 15-stage voltage setting
19, 18
28 Logic block supply voltage pin
1M D
Output OFF time setting pins for switching operation
Pins for controlling the set current with sensing resistor RE
Output pins
Output phase selector input pins
Output ON/OFF setting input pins
LB11847
No. 6183-6/16
Block Diagram
Control logic
circuit
Thermal shutdown
circuit
Control logic
circuit
Current
selector
circuit
Current
selector
circuit
One-shot
multi-
blanking
time
One-shot
multi-
blanking
time
MD
PHASE1
DECAY1
ENABLE1
I
A
1
I
A
2
I
A
3
I
A
4
V
REF
1
GND
V
CC
OUT
B
OUT
B
V
BB
OUT
A
OUT
A
PHASE2
DECAY2
ENABLE2
I
B
1
I
B
2
I
B
3
I
B
4
V
REF
2
CR1 E1 E2 CR2
A12534
LB11847
No. 6183-7/16
Sequence Table
*
: Iout percentage (%) is the calculated setting value.
IA4IA3IA2I
A1IOUT IB1
IB2IB3
IB4IOUT
No. ENA1 PHA1 ENA2 PHA2
01111 0 0100% 0010 1 0%
√√√√
11111 0 0100 0010 0 017.39
√
21111 0 0100 0011 0 026.08
√√
31110 0 096.65 0100 0 034.78
√
41101 0 091.30 0101 0 043.48
√√√
51100 0 086.95 0110 0 052.17
√
61011 0 082.61 0111 0 060.87
√√
71010 0 078.26 1000 0 069.56
√
81001 0 073.91 1001 0 073.91
√√√√
91000 0 069.56 1010 0 078.26
√
100111 0 060.87 1011 0 082.61
√√
110110 0 052.17 1100 0 086.95
√
120101 0 043.48 1101 0 091.30
√√√
130100 0 034.78 1110 0 096.65
√
140011 0 026.08 1111 0 0100
√√
150010 0 017.39 1111 0 0100
√
160001 1 0 1111 0 0100
√√√√
170010 0 117.39 1111 0 0100
√
180011 0 126.08 1111 0 0100
√√
190100 0 134.78 1110 0 095.65
√
200101 0 143.48 1101 0 091.30
√√√
210110 0 152.17 1100 0 086.95
√
220111 0 160.87 1011 0 082.61
√√
231000 0 169.56 1010 0 078.26
√
241001 0 173.91 1001 0 073.91
√√√√
251010 0 178.26 1000 0 069.56
√
261011 0 182.61 0111 0 060.87
√√
271100 0 186.95 0110 0 052.17
√
281101 0 191.30 0101 0 043.48
√√√
291110 0 195.65 0100 0 034.78
√
301111 0 1100 0011 0 026.08
√√
311111 0 1100 0010 0 017.39
√
Ph
ase
A Ph
ase
B Phase 1-2 Phase W1-2 Phase 2W1-2 Phase 4W1-2
*
*
LB11847
No. 6183-8/16
Switch Timing Chart during PWM Drive
Output pin
CR pin
Output pin
E pin
Output pin
CR pin
Output pin
E pin
t
n
Switching waveform
Switching waveform
A12535
A12536
Noise spike
FAST DECAY
SLOW DECAY(upper-side chopping)
DECAY pin : High
DECAY pin : High
MD pin : Low
MD pin : Low
LB11847
No. 6183-9/16
ton : Output ON time
toff : Output OFF time
tm: FAST DECAY time in MIX DECAY mode
tn: Noise cancelling time
MIX DECAY logic setting
DECAY pin : L
MD pin : 1.5V to 4.0V voltage setting
CR voltage and MD pin voltage are compared to select dual-side chopping
or upper-side chopping.
CR voltage > MD pin voltage: dual-side chopping
CR voltage < MD pin voltage: top-side choppinng
t
m
t
n
Switching waveform
Output pin
CR pin
Output pin
E pin
MIX DECAY
t
off
t
on
A12537
Noise spike
LB11847
No. 6183-10/16
Current path in FAST DECAY mode
SLOW DECAY current path
Regenerative current during upper-side transistor switching operation
A12538
A12539
ON
ON
OUT
A
SBD
SBD
Re
OUT
A
V
BB
OFF
Current path at output ON
Regenerative circuit
ON
ON
OFF
OUT
A
SBD
SBD
Re
Sensing voltage comparator
OUT
A
V
BB
OFF
Current path at output ON
Current path in FAST DECAY mode
when upper-side transistor is OFF
Constant Sensing voltage comparator
LB11847
No. 6183-11/16
Composite Vectors of Set Current (1 step normalized to 90°)
* Rotation angle and composite spectrum are calculated values.
No. θRotation angles Composite vectors
0θ00°100.0
1θ19.87°101.5
2θ214.6°103.35
3θ320.0°101.78
4θ425.5°101.12
5θ530.96°101.4
6θ636.38°102.61
7θ741.63°104.7
8θ845.0°104.5
9θ948.37°104.7
10 θ10 53.62°102.61
11 θ11 59.04°101.4
12 θ12 64.5°101.12
13 θ13 70.0°101.78
14 θ14 75.4°103.35
15 θ15 80.13°101.5
16 θ16 90.0°100.0
Phase B
I
OUT
Phase A
I
OUT
16 15 14 13
12 11 10
9
8
7
6
5
4
3
2
1
0
Sequence No.
A12540
LB11847
No. 6183-12/16
Set Current Waveform Model
I
OUT
I
OUT
Phase A
Phase B
PHASE1
PHASE2
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
A12541
LB11847
No. 6183-13/16
Sample Application Circuit
Notes on Usage
1. External diodes
Because this IC uses upper-side transistor switching in SLOW DECAY mode and dual-side transistor switching in
FAST DECAY mode, it requires external diodes between the OUT pins and ground for the regenerative current during
switching OFF. Use Schottky barrier diodes with low VF.
2. VREF pin
Because the VREF pin serves for input of the set current reference voltage, precautions against noise must be taken. The
input voltage range is 0 to 3.0V.
3. GND pin
The ground circuit for this IC must be designed so as to allow for high-current switching. Blocks where high current
flows must use low-impedance patterns and must be removed from small-signal lines. Especially the ground connection
for the sensing resistor RE at pin E, and the ground connection for the Schottky barrier diodes should be in close
proximity to the IC ground.
The capacitors between VCC and ground, and VBB and ground should be placed close to the VCC and VBB pins,
respectively.
A12542
28 27 26 25 24 23 22 21 20 19 18 17 16 15
1234567891011121314
V
CC
PHASE1
ENABLE1
I
A
1
I
A
2
I
A
3
I
A
4
I
B
4
I
B
3
I
B
2
I
B
1
ENABLE2
PHASE2
GND
MD
V
REF
1
CR1
E1
DECAY1
OUT
A
OUT
A
OUT
B
OUT
B
DECAY2
E2
CR2
V
REF
2
V
BB
10 µF5V
470 pF
470 pF
47 µF
42V
0.51Ω
0.51Ω15 kΩ
15 kΩ
1.5V
1.5V to 4.0V
SBD
SBD SBD
SBD
LL
Logic input
LB11847
voltage setting
LB11847
No. 6183-14/16
4. Simultaneous ON prevention function
This IC incorporates a circuit to prevent feedthrough current when phase switching. For reference, the output ON and
OFF delay times at PHASE and ENABLE switching are given below.
Reference data * typical value
Equation when logic voltage VCC = 5 V
CR pin voltage E1 = VCC
• R/(R1+R2+R) [V]
Noise cancel time tn
(R1+R2) • C • 1n {(E1-1.5)/(E1-4.0)} [s]
Switching OFF time toff –R • C • 1n (1.5/E1) [s]
Internal resistance at CR pin : R1 = 1 kΩ, R2 = 300Ω (typ.)
*The CR constant setting range in Figure 2 on page 15 is given for reference. It applies to a switching OFF time in the
range from 8 to 100 µs. The switching time can also be made higher than 100 µs. However, a capacitor value of more
than several thousand pF will result in longer noise canceling time, which can cause the output current to become higher
than the set current. The longer switching OFF time results in higher output current ripple, causing a drop in average
current and rotation ef ficiency. When keeping the switching OFF time within 100 µs, it is recommended to stay within
the CR constant range shown in Figure 2.
Internal configuration at CR pin
Figure 1
=
..=
..
5. Noise canceler
This IC has a noise canceling function to prevent malfunction due to noise spikes generated when switching ON. The
noise cancel time tn is determined by internal resistance of the CR pin and the constant of the externally connected CR
components. The constant also determines the switching OFF time.
Figure 1 shows the internal configuration at the CR pin, and Figure 2 shows the CR pin constant setting range.
A12543
R:15 kΩC:470 pF
300Ω
CR pin
E1
One-shot multi-blanking
time circuit R1
R2
1 kΩ
V
CC
line
Sink side Source side
PHASE switching ON delay t i m e 1.9 µs 2.2 µs
(Low -> High) OFF delay time 0.8 µs 1.8 µs
PHASE switching ON delay t i m e 1.4 µs 1.7 µs
(High -> Low) OFF delay time 0.9 µs 1.35 µs
ENABLE switching ON delay time 2.15 µs 2.75 µs
OFF delay time 1.2 µs 5.8 µs
LB11847
No. 6183-15/16
Switching OFF Time and CR Setting Range
(toff time : approx. 8 to 100 µs)
Figure 2
50k 100k
R [Ω]
1000
2000
3000
C [pF]
t
off
time : 30 µs
t
off
time : 50 µs
t
off
time : 100 µs
A12544
LB11847
No. 6183-16/16
This catalog provides information as of June, 1999. Specifications and information herein are subject to change
without notice.
PS
Specifications of any and all SANYO products described or contained herein stipulate the performance,
characteristics, and functions of the described products in the independent state, and are not guarantees
of the performance, characteristics, and functions of the described products as mounted in the customer's
products or equipment. To verify symptoms and states that cannot be evaluated in an independent device,
the customer should always evaluate and test devices mounted in the customer's products or equipment.
SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all
semiconductor products fail with some probability. It is possible that these probabilistic failures could
give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire,
or that could cause damage to other property. When designing equipment, adopt safety measures so
that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective
circuits and error prevention circuits for safe design, redundant design, and structural design.
In the event that any or all SANYO products(including technical data,services) described or
contained herein are controlled under any of applicable local export control laws and regulations,
such products must not be exported without obtaining the export license from the authorities
concerned in accordance with the above law.
No part of this publication may be reproduced or transmitted in any form or by any means, electronic or
mechanical, including photocopying and recording, or any information storage or retrieval system,
or otherwise, without the prior written permission of SANYO Electric Co. , Ltd.
Any and all information described or contained herein are subject to change without notice due to
product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification"
for the SANYO product that you intend to use.
Information (including circuit diagrams and circuit parameters) herein is for example only ; it is not
guaranteed for volume production. SANYO believes information herein is accurate and reliable, but
no guarantees are made or implied regarding its use or any infringements of intellectual property rights
or other rights of third parties.
