NCR320ZX - NEXPERIA - Datasheet.World

NCR320Z / NCR321Z

250 mA LED driver in SOT223

Rev. 1 — 4 February 2019 Product data sheet

1. Product profile

1.1. General description

LED driver consisting of a resistor-equipped NPN transistor with two diodes on one chip in a

medium power SOT223 (SC-73) Surface-Mounted Device (SMD) plastic package.

Table 1. Product overview

PackageType number

Nexperia JEITA

NCR320Z SOT223 SC-73

NCR321Z SOT223 SC-73

1.2. Features and benefits

•Stabilized output current of 10 mA without external resistor

•Stabilized output current adjustable up to 250 mA when an external resistor is used

•High current accuracy at supply voltage variation

•Low voltage overhead of 1.4 V

•Reduces component count and board space

•High power dissipation of 1250 mW

•Supply voltage up to 16 V

•Digital PWM input up to 10 kHz frequency for NCR321Z

•AEC-Q101 qualified

1.3. Applications

•Constant current LED driver

•Generic constant current source

•Automotive applications (for example: interior lighting, dash board, instrumentation, number

plate light)

•Increase stabilized output current by paralleling drivers

Nexperia NCR320Z / NCR321Z

250 mA LED driver in SOT223

1.4. Quick reference data

Table 2. Quick reference data

Symbol Parameter Conditions Min Typ Max Unit

enable voltage

NCR320Z - - 25 V

VEN

NCR321Z - - 4.5 V

Vout output voltage - - 16 V

stabilized output current

NCR320Z Vout= 1.4 V;

VEN= 12 V

[1] 9 10 11 mA

Iout

NCR321Z Vout= 1.4 V;

VEN= 3.3 V

[1] 9 10 11 mA

[1] Pulse test: tp ≤ 300 µs; δ ≤ 0.02

2. Pinning information

Table 3. Pinning

Pin Symbol Description Simplified outline Symbol

1 VEN enable voltage

2 REXT external resistor

3 GND ground

4 IOUT output current

1 32

aaa-029430

VEN GNDREXT

IOUT

3. Ordering information

Table 4. Ordering information

PackageType number

Name Description Version

NCR320Z SC-73 plastic surface-mounted package with

increased heatsink; 4 leads

SOT223

NCR321Z SC-73 plastic surface-mounted package with

increased heatsink; 4 leads

SOT223

4. Marking

Table 5. Marking codes

Type number Marking code

NCR320Z CR320Z

NCR321Z CR321Z

Product data sheet Rev. 1 — 4 February 2019 2 / 18

Nexperia NCR320Z / NCR321Z

250 mA LED driver in SOT223

5. Limiting values

Table 6. Limiting values

In accordance with the Absolute Maximum Rating System (IEC 60134).

Symbol Parameter Conditions Min Max Unit

Iout stabilized output current if

external resistor is used

- 300 mA

enable voltage

NCR320Z - 25 V

VEN

NCR321Z - 4.5 V

Vout output voltage - 16 V

VRreverse voltage [1] - 0.5 V

[2] - 765 mW

[3] - 1160 mW

[4] - 1250 mW

Ptot total power dissipation Tamb ≤ 25 °C

[5] - 1800 mW

Tjjunction temperature - 150 °C

Tamb ambient temperature -55 150 °C

Tstg storage temperature -65 150 °C

[1] Between all terminals.

[2] Device mounted on an FR4 Printed-Circuit Board (PCB), single-side copper (70 µm), tin-plated and

standard footprint.

[3] Device mounted on an FR4 Printed-Circuit Board (PCB), single-side copper (70 µm), tin-plated; mounting

pad for collector 1 cm2.

[4] Device mounted on an FR4 Printed-Circuit Board (PCB), 4-layer copper, tin-plated and standard footprint.

[5] Device mounted on an FR4 Printed-Circuit Board (PCB), 4-layer copper, tin-plated; mounting pad for

collector 1 cm2.

Tamb (°C)

-75 17512525 75-25

aaa.029431

0.8

1.2

0.4

1.6

2.0

Ptot

(W)

(1)

(2)

(3)

(4)

(1) FR4 PCB, 4-layer copper, 1 cm2

(2) FR4 PCB, 4-layer copper, standard footprint

(3) FR4 PCB, single sided copper (70 µm), 1 cm2

(4) FR4 PCB, single-sided copper (70 µm), standard footprint

Fig. 1. Power derating curve

Product data sheet Rev. 1 — 4 February 2019 3 / 18

Nexperia NCR320Z / NCR321Z

250 mA LED driver in SOT223

6. Thermal characteristics

Table 7. Thermal characteristics

Symbol Parameter Conditions Min Typ Max Unit

[1] - - 164 K/W

[2] - - 108 K/W

[3] - - 100 K/W

Rth(j-a) thermal resistance from

junction to ambient

in free air

[4] - - 70 K/W

Rth(j-sp) thermal resistance from

junction to solder point

- - 27 K/W

[1] Device mounted on an FR4 PCB, single-sided copper (70 µm), tin-plated and standard footprint.

[2] Device mounted on an FR4 PCB, single-sided copper (70 µm), tin-plated; mounting pad

for collector 1 cm2.

[3] Device mounted on an FR4 PCB, 4-layer copper, tin-plated and standard footprint.

[4] Device mounted on an FR4 PCB, 4-layer copper, tin-plated; mounting pad for collector 1 cm2.

aaa-029432

10-5 1010-2

10-4 102

10-1

tp (s)

10-3 103

102

103

Zth(j-a)

(K/W)

0.02

0.05

0.33

0.75

duty cycle = 1

0.10

0.20

0.50

FR4 PCB; single-sided copper; tin-plated and standard footprint

Fig. 2. Transient thermal impedance from junction to ambient as a function of pulse duration; typical values

aaa-029433

10-5 1010-2

10-4 102

10-1

tp (s)

10-3 103

102

103

Zth(j-a)

(K/W)

0.02

0.05

0.33

0.75

duty cycle = 1

0.10

0.20

0.50

FR4 PCB; single-sided copper, tin-plated; mounting pad for collector 1 cm 2

Fig. 3. Transient thermal impedance from junction to ambient as a function of pulse duration; typical values

Product data sheet Rev. 1 — 4 February 2019 4 / 18

Nexperia NCR320Z / NCR321Z

250 mA LED driver in SOT223

aaa-029434

10-5 1010-2

10-4 102

10-1

tp (s)

10-3 103

102

103

Zth(j-a)

(K/W)

duty cycle = 1

0.02

0.05

0.33

0.10

0.20

0.75

0.50

FR4 PCB; 4-layer copper; tin-plated and standard footprint

Fig. 4. Transient thermal impedance from junction to ambient as a function of pulse duration; typical values

aaa-029435

10-5 1010-2

10-4 102

10-1

tp (s)

10-3 103

102

103

Zth(j-a)

(K/W)

duty cycle = 1

0.05

0.10

0.20

0.33

0.75

0.50

0.02

FR4 PCB; 4-layer copper, tin-plated; mounting pad for collector 1 cm 2

Fig. 5. Transient thermal impedance from junction to ambient as a function of pulse duration; typical values

Product data sheet Rev. 1 — 4 February 2019 5 / 18

Nexperia NCR320Z / NCR321Z

250 mA LED driver in SOT223

7. Characteristics

Table 8. Characteristics

Tamb = 25 °C unless otherwise specified.

Symbol Parameter Conditions Min Typ Max Unit

V(BR)CEO collector-emitter

breakdown voltage

IC = 1 mA; IB = 0 A 16 - - V

hFE DC current gain VCE =1 V; IC = 50 mA [1] 200 350 -

Rint internal resistor IRint = 10 mA 85 95 105 Ω

VRint voltage drop at internal

resistor Rint

Iout = 10 mA [1] 0.85 0.95 1.05 V

enable current

NCR320Z VEN = 12 V [1] - 1.2 - mA

IEN

NCR321Z VEN =3.3 V [1] - 1.2 - mA

bias resistor

NCR320Z - 10 - kΩ

NCR321Z - 1.5 - kΩ

stabilized output current

NCR320Z VEN = 12 V; Vout = 1.4 V [1] 9 10 11 mA

Iout

NCR321Z VEN = 3.3 V; Vout = 1.4 V [1] 9 10 11 mA

stabilized output current

NCR320Z at Rext = 3 Ω VEN = 12 V; Vout > 1.4 V [1] - 250 - mA

Iout

NCR321Z at Rext = 3 Ω VEN = 3.3 V; Vout > 1.4 V [1] - 250 - mA

Vout, min lowest sufficient output

voltage overhead:

Vout = VCC - VLED

Iout> 10 mA - 1.4 - V

stabilized output current change over ambient temperature

NCR320Z VEN = 12 V; Vout > 2 V [1] - -0.27 - %/K

ΔIout/(Iout x ΔTamb)

NCR321Z VEN = 3.3 V; Vout > 2 V [1] - -0.27 - %/K

stabilized output current change over supply voltage

NCR320Z VEN = 12 V; Vout > 2 V [1] - 1 - %/V

ΔIout/(Iout x ΔVCC)

NCR321Z VEN = 3.3 V; Vout > 2 V [1] - 1 - %/V

[1] Pulse test: tp ≤ 300 μs; δ ≤ 0.02.

Product data sheet Rev. 1 — 4 February 2019 6 / 18

Nexperia NCR320Z / NCR321Z

250 mA LED driver in SOT223

Vout (V)

0 1284

aaa-029390

0.1

0.2

0.3

Iout

(A)

(1)

(2)

(3)

(4)

(5)

(6)

VEN = 12 V; Tamb = 25 °C

(1) Rext = 3 Ω

(2) Rext = 4 Ω

(3) Rext = 6 Ω

(4) Rext = 10 Ω

(5) Rext = 20 Ω

(6) Rext = open

Fig. 6. NCR320Z: Output current as a function of

output voltage; typical values

Rext

1 102

aaa-029444

0.2

0.1

0.3

0.4

Iout

(A)

(1)

(2)

VEN = 12 V; Tamb = 25 °C

(1) Vout = 1.4 V

(2) Vout = 5.4 V

Fig. 7. NCR320Z: Output current as a function of

external resistor; typical values

Vout (V)

0 1284

aaa-029392

0.005

0.010

0.015

Iout

(A)

(1)

(3)

(2)

VEN = 12 V; Rext = open

(1) Tamb = 85 °C

(2) Tamb = 25 °C

(3) Tamb = -40 °C

Fig. 8. NCR320Z: Output current as a function of

output voltage; typical values

Vout (V)

0 1284

aaa-029393

0.07

Iout

(A)

0.01

0.02

0.03

0.04

0.05

0.06

(1)

(3)

(2)

VEN = 12 V; Rext = 20 Ω

(1) Tamb = 85 °C

(2) Tamb = 25 °C

(3) Tamb = -40 °C

Fig. 9. NCR320Z: Output current as a function of

output voltage; typical values

Product data sheet Rev. 1 — 4 February 2019 7 / 18

Nexperia NCR320Z / NCR321Z

250 mA LED driver in SOT223

Vout (V)

0 1284

aaa-029394

0.1

0.2

0.3

Iout

(A)

(1)

(2)

(3)

VEN = 12 V; Rext = 3 Ω

(1) Tamb = 85 °C

(2) Tamb = 25 °C

(3) Tamb = -40 °C

Fig. 10. NCR320Z: Output current as a function of

output voltage; typical values

VEN (V)

0 252010 155

aaa-029395

0.005

0.010

0.015

Iout

(A)

(1)

(3)

(2)

Vout = 2 V; Rext = open

(1) Tamb = 85 °C

(2) Tamb = 25 °C

(3) Tamb = -40 °C

Fig. 11. NCR320Z: Output current as a function of

enable voltage; typical values

aaa-029396

VEN (V)

0 252010 155

0.07

Iout

(A)

0.05

0.03

0.01

0.02

0.04

0.06

(1)

(3)

(2)

Vout = 2 V; Rext = 20 Ω

(1) Tamb = 85 °C

(2) Tamb = 25 °C

(3) Tamb = -40 °C

Fig. 12. NCR320Z: Output current as a function of

enable voltage; typical values

VEN (V)

0 252010 155

aaa-029397

0.1

0.2

0.3

Iout

(A)

(1)

(3)

(2)

Vout = 2 V; Rext = 3 Ω

(1) Tamb = 85 °C

(2) Tamb = 25 °C

(3) Tamb = -40 °C

Fig. 13. NCR320Z: Output current as a function of

enable voltage; typical values

Product data sheet Rev. 1 — 4 February 2019 8 / 18

Nexperia NCR320Z / NCR321Z

250 mA LED driver in SOT223

VEN (V)

0 252010 155

aaa-029398

0.1

0.2

0.3

Iout

(A)

(4)

(6)

(5)

(1)

(3)

(2)

Vout = 2 V; Tamb = 25 °C

(1) Rext = 3 Ω

(2) Rext = 4 Ω

(3) Rext = 6 Ω

(4) Rext = 10 Ω

(5) Rext = 20 Ω

(6) Rext = open

Fig. 14. NCR320Z: Output current as a function of

enable voltage; typical values

VEN (V)

0 252010 155

aaa-029399

IEN

(mA)

(1)

(3)

(2)

Iout = 0 A; Rext = open

(1) Tamb = 85 °C

(2) Tamb = 25 °C

(3) Tamb = -40 °C

Fig. 15. NCR320Z: Enable current as a function of

enable voltage; typical values

Vout (V)

0 1284

aaa-029400

0.1

0.2

0.3

Iout

(A)

(1)

(2)

(3)

(4)

(5)

(6)

VEN = 3.3 V; Tamb = 25 °C

(1) Rext = 3 Ω

(2) Rext = 4 Ω

(3) Rext = 6 Ω

(4) Rext = 10 Ω

(5) Rext = 20 Ω

(6) Rext = open

Fig. 16. NCR321Z: Output current as a function of

output voltage; typical values

Rext

1 102

aaa-029445

0.2

0.1

0.3

0.4

Iout

(A)

(1)

(2)

VEN = 3.3 V; Tamb = 25 °C

(1) Vout = 1.4 V

(2) Vout = 5.4 V

Fig. 17. NCR321Z: Output current as a function of

external resistor; typical values

Product data sheet Rev. 1 — 4 February 2019 9 / 18

Nexperia NCR320Z / NCR321Z

250 mA LED driver in SOT223

Vout (V)

0 1284

aaa-029402

0.005

0.010

0.015

Iout

(A)

(1)

(3)

(2)

VEN = 3.3 V; Rext = open

(1) Rext = 85 °C

(2) Rext = 25 °C

(3) Rext = -40 °C

Fig. 18. NCR321Z: Output current as a function of

output voltage; typical values

Vout (V)

0 1284

aaa-029403

0.07

Iout

(A)

0.01

0.02

0.03

0.04

0.05

0.06

(1)

(3)

(2)

VEN = 3.3 V; Rext = 20 Ω

(1) Rext = 85 °C

(2) Rext = 25 °C

(3) Rext = -40 °C

Fig. 19. NCR321Z: Output current as a function of

output voltage; typical values

Vout (V)

0 1284

aaa-029404

0.1

0.2

0.3

Iout

(A)

(1)

(3)

(2)

VEN = 3.3 V; Rext = 3 Ω

(1) Rext = 85 °C

(2) Rext = 25 °C

(3) Rext = -40 °C

Fig. 20. NCR321Z: Output current as a function of

output voltage; typical values

VEN (V)

0 542 31

aaa-029405

0.005

0.010

0.015

Iout

(A)

(1)

(3)

(2)

Vout = 2 V; Rext = open

(1) Rext = 85 °C

(2) Rext = 25 °C

(3) Rext = -40 °C

Fig. 21. NCR321Z: Output current as a function of

enable voltage; typical values

Product data sheet Rev. 1 — 4 February 2019 10 / 18

Nexperia NCR320Z / NCR321Z

250 mA LED driver in SOT223

aaa-029406

VEN (V)

0 542 31

0.07

Iout

(A)

0.05

0.03

0.01

0.02

0.04

0.06

(1)

(3)

(2)

Vout = 2 V; Rext = 20 Ω

(1) Rext = 85 °C

(2) Rext = 25 °C

(3) Rext = -40 °C

Fig. 22. NCR321Z: Output current as a function of

enable voltage; typical values

VEN (V)

0 542 31

aaa-029407

0.1

0.2

0.3

Iout

(A)

(1)

(3)

(

)

Vout = 2 V; Rext = 3 Ω

(1) Rext = 85 °C

(2) Rext = 25 °C

(3) Rext = -40 °C

Fig. 23. NCR321Z: Output current as a function of

enable voltage; typical values

VEN (V)

0 642

aaa-029408

0.1

0.2

0.3

Iout

(A)

(1)

(2)

(3)

(4)

(5)

(6)

Vout = 2 V; Tamb = 25 °C

(1) Rext = 3 Ω

(2) Rext = 4 Ω

(3) Rext = 6 Ω

(4) Rext = 10 Ω

(5) Rext = 20 Ω

(6) Rext = open

Fig. 24. NCR321Z: Output current as a function of

enable voltage; typical values

aaa-029409

VEN (V)

0 642

(

(1)

(3)

(2)

Iout = 0 A; Rext = open

(1) Tamb = 85 °C

(2) Tamb = 25 °C

(3) Tamb = -40 °C

Fig. 25. NCR321Z: Enable current as a function of

enable voltage; typical values

Product data sheet Rev. 1 — 4 February 2019 11 / 18

Nexperia NCR320Z / NCR321Z

250 mA LED driver in SOT223

8. Application information

Figure 26 shows a typical application circuit for an LED driver. The constant current ensures a

constant brightness in all LEDs. The output current can be adjusted between 10 mA and 250 mA

by connecting resistor Rext. Figures 7 and 17 give a first indication for choosing the external resitor

Rext. The minimum input voltage is given by voltage drop at the LED's VLED and the maximum is

governed by the maximum power dissipation

VLED + Vout, min < VCC < Ptot /Iout + VLED

aaa-029337

VEN

IOU

out

ext

Fig. 26. LED driver application diagram

NCR321Z can be used for PWM dimming or on/off function by driving the VEN pin. The enable

voltage depends on the drive current, see Figure 23. Figure 27 shows a typical application

where VEN is driven via a micro directly. To control more than one NCR321Z devices by one

microcontroller output, a shift register (for example 74AHC(T)594PW) can be used.

aaa-029336

VEN

OUT

REX

out

C /

ext

Logic

Fig. 27. Application diagram: PWM dimming function

Product data sheet Rev. 1 — 4 February 2019 12 / 18

Nexperia NCR320Z / NCR321Z

250 mA LED driver in SOT223

To savely drive currents that are above the limits of the NCR32xZ, two or more devices can be

parallel connected as illustrated in Figure 28. When choosing the same values for the external

resistors, the drive current splits equally and the capability of handling excess power is doubled.

Both, NCR320Z and NCR321Z can be used in this configuration.

VEN

out

ext

aaa-029364

VEN

out

ext

Fig. 28. Application diagram: Parallelization

Product data sheet Rev. 1 — 4 February 2019 13 / 18

Nexperia NCR320Z / NCR321Z

250 mA LED driver in SOT223

9. Package outline

Table 9. Package outline

UNIT A1bpc D E e1HELpQ ywv

REFERENCES

OUTLINE

VERSION

EUROPEAN

PROJECTION ISSUE DATE

IEC JEDEC JEITA

mm 0.10

0.01

1.8

1.5

0.80

0.60

3.1

2.9

0.32

0.22

6.7

6.3

3.7

3.3 2.3

4.6 7.3

6.7

1.1

0.7

0.95

0.85 0.1 0.10.2

DIMENSIONS (mm are the original dimensions)

SOT223 SC-73 04-11-10

06-03-16

detail X

vMA

0 2 4 mm

scale

1 32

Plastic surface-mounted package with increased heatsink; 4 leads SOT223

Fig. 29. Package outline SC-73 (SOT223)

Product data sheet Rev. 1 — 4 February 2019 14 / 18

Nexperia NCR320Z / NCR321Z

250 mA LED driver in SOT223

10. Soldering

Table 10. Soldering

sot223_fr

1.2

(4×)

1.2

(3×)

1.3

(4×)

1.3

(3×)

6.15

3.85

3.6

3.5

0.3

3.9 7.65

2.3 2.3

6.1

2 31

solder lands

solder resist

occupied area

solder paste

Dimensions in mm

Fig. 30. Reflow soldering footprint for SC-73 (SOT223)

sot223_fw

1.9

6.7

8.9

8.7

1.9

(3×)

1.9

(2×)

1.1

6.2

2.7

solder lands

solder resist

occupied area

preferred transport

direction during soldering

Dimensions in mm

Fig. 31. Wave soldering footprint for SC-73 (SOT223)

Product data sheet Rev. 1 — 4 February 2019 15 / 18

Nexperia NCR320Z / NCR321Z

250 mA LED driver in SOT223

11. Revision history

Table 11. Revision history

Document ID Release date Data sheet status Change

notice

Supersedes

NCR320Z_NCR321Z v.1 20190204 Product data sheet - -

Product data sheet Rev. 1 — 4 February 2019 16 / 18

Nexperia NCR320Z / NCR321Z

250 mA LED driver in SOT223

12. Legal information

Data sheet status

Document status

[1][2]

Product

status [3]

Definition

Objective [short]

data sheet

Development This document contains data from

the objective specification for

product development.

Preliminary [short]

data sheet

Qualification This document contains data from

the preliminary specification.

Product [short]

data sheet

Production This document contains the product

specification.

[1] Please consult the most recently issued document before initiating or

completing a design.

[2] The term 'short data sheet' is explained in section "Definitions".

[3] The product status of device(s) described in this document may have

changed since this document was published and may differ in case of

multiple devices. The latest product status information is available on

the internet at https://www.nexperia.com.

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full data sheet, which is available on request via the local Nexperia sales

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for the planned application and use of customer’s third party customer(s).

Customers should provide appropriate design and operating safeguards to

minimize the risks associated with their applications and products.

Nexperia does not accept any liability related to any default, damage, costs

or problem which is based on any weakness or default in the customer’s

applications or products, or the application or use by customer’s third party

customer(s). Customer is responsible for doing all necessary testing for the

customer’s applications and products using Nexperia products in order to

avoid a default of the applications and the products or of the application or

use by customer’s third party customer(s). Nexperia does not accept any

liability in this respect.

Limiting values — Stress above one or more limiting values (as defined in

the Absolute Maximum Ratings System of IEC 60134) will cause permanent

damage to the device. Limiting values are stress ratings only and (proper)

operation of the device at these or any other conditions above those

given in the Recommended operating conditions section (if present) or the

Characteristics sections of this document is not warranted. Constant or

repeated exposure to limiting values will permanently and irreversibly affect

the quality and reliability of the device.

Terms and conditions of commercial sale — Nexperia products are

sold subject to the general terms and conditions of commercial sale, as

published at http://www.nexperia.com/profile/terms, unless otherwise agreed

in a valid written individual agreement. In case an individual agreement is

concluded only the terms and conditions of the respective agreement shall

apply. Nexperia hereby expressly objects to applying the customer’s general

terms and conditions with regard to the purchase of Nexperia products by

customer.

No offer to sell or license — Nothing in this document may be interpreted

or construed as an offer to sell products that is open for acceptance or the

grant, conveyance or implication of any license under any copyrights, patents

or other industrial or intellectual property rights.

Export control — This document as well as the item(s) described herein

may be subject to export control regulations. Export might require a prior

authorization from competent authorities.

Translations — A non-English (translated) version of a document is for

reference only. The English version shall prevail in case of any discrepancy

between the translated and English versions.

Trademarks

Notice: All referenced brands, product names, service names and

trademarks are the property of their respective owners.

Product data sheet Rev. 1 — 4 February 2019 17 / 18

Nexperia NCR320Z / NCR321Z

250 mA LED driver in SOT223

Contents

1. Product profile.............................................................. 1

1.1. General description......................................................1

1.2. Features and benefits..................................................1

1.3. Applications................................................................. 1

1.4. Quick reference data................................................... 2

2. Pinning information......................................................2

3. Ordering information....................................................2

4. Marking.......................................................................... 2

5. Limiting values............................................................. 3

6. Thermal characteristics............................................... 4

7. Characteristics..............................................................6

8. Application information............................................. 12

9. Package outline.......................................................... 14

10. Soldering................................................................... 15

11. Revision history........................................................ 16

12. Legal information......................................................17

For more information, please visit: http://www.nexperia.com

For sales office addresses, please send an email to: salesaddresses@nexperia.com

Date of release: 4 February 2019

Product data sheet Rev. 1 — 4 February 2019 18 / 18