bcr320u bcr321u led driver rev2.0

8/13/2019 Bcr320u Bcr321u Led Driver Rev2.0

1/26

Power Management & Mult imarket

Datasheet

Revision 2.0, 2012-05-04

BCR320U / BCR321U

LED Driver


2/26

Edit ion 2012-05-04

Published byInfineon Technologies AG81726 Munich, Germany

2012Infineon Technologies AGAl l Rights Reserved.

Legal Disclaimer

The information given in this document shall in no event be regarded as a guarantee of conditions orcharacteristics. With respect to any examples or hints given herein, any typical values stated herein and/or anyinformation regarding the application of the device, Infineon Technologies hereby disclaims any and all warrantiesand liabilities of any kind, including without limitation, warranties of non-infringement of intellectual property rightsof any third party.

Information

For further information on technology, delivery terms and conditions and prices, please contact the nearestInfineon Technologies Office (www.infineon.com ).

Warnings

Due to technical requirements, components may contain dangerous substances. For information on the types inquestion, please contact the nearest Infineon Technologies Office.

Infineon Technologies components may be used in life-support devices or systems only with the express writtenapproval of Infineon Technologies, if a failure of such components can reasonably be expected to cause the failureof that life-support device or system or to affect the safety or effectiveness of that device or system. Life supportdevices or systems are intended to be implanted in the human body or to support and/or maintain and sustainand/or protect human life. If they fail, it is reasonable to assume that the health of the user or other persons maybe endangered.
http://www.infineon.com/http://www.infineon.com/


3/26

BCR320U / BCR321U

Datasheet 3 Revision 2.0, 2012-05-04

Trademarks of Infineon Technologies AG

AURIX, C166, CanPAK, CIPOS, CIPURSE, EconoPACK, CoolMOS, CoolSET,

CORECONTROL, CROSSAVE, DAVE, DI-POL, EasyPIM, EconoBRIDGE, EconoDUAL,

EconoPIM, EconoPACK, EiceDRIVER, eupec, FCOS, HITFET, HybridPACK, IRF,

ISOFACE, IsoPACK, MIPAQ, ModSTACK, my-d, NovalithIC, OptiMOS, ORIGA,POWERCODE; PRIMARION, PrimePACK, PrimeSTACK, PRO-SIL, PROFET, RASIC,

ReverSave, SatRIC, SIEGET, SINDRION, SIPMOS, SmartLEWIS, SOLID FLASH, TEMPFET,

thinQ!, TRENCHSTOP, TriCore.

Other Trademarks

Advance Design System (ADS) of Agilent Technologies, AMBA, ARM, MULTI-ICE, KEIL,

PRIMECELL, REALVIEW, THUMB, Vision of ARM Limited, UK. AUTOSAR is licensed by AUTOSAR

development partnership. Bluetooth of Bluetooth SIG Inc. CAT-iq of DECT Forum. COLOSSUS,

FirstGPS of Trimble Navigation Ltd. EMV of EMVCo, LLC (Visa Holdings Inc.). EPCOS of Epcos AG.

FLEXGO of Microsoft Corporation. FlexRay is licensed by FlexRay Consortium. HYPERTERMINAL of

Hilgraeve Incorporated. IEC of Commission Electrotechnique Internationale. IrDA of Infrared DataAssociation Corporation. ISO of INTERNATIONAL ORGANIZATION FOR STANDARDIZATION. MATLAB of

MathWorks, Inc. MAXIM of Maxim Integrated Products, Inc. MICROTEC, NUCLEUS of Mentor Graphics

Corporation. MIPI of MIPI Alliance, Inc. MIPS of MIPS Technologies, Inc., USA. muRata of MURATA

MANUFACTURING CO., MICROWAVE OFFICE (MWO) of Applied Wave Research Inc., OmniVision of

OmniVision Technologies, Inc. Openwave Openwave Systems Inc. RED HAT Red Hat, Inc. RFMD RF

Micro Devices, Inc. SIRIUS of Sirius Satellite Radio Inc. SOLARIS of Sun Microsystems, Inc. SPANSION

of Spansion LLC Ltd. Symbian of Symbian Software Limited. TAIYO YUDEN of Taiyo Yuden Co.

TEAKLITE of CEVA, Inc. TEKTRONIX of Tektronix Inc. TOKO of TOKO KABUSHIKI KAISHA TA. UNIX

of X/Open Company Limited. VERILOG, PALLADIUM of Cadence Design Systems, Inc. VLYNQ of Texas

Instruments Incorporated. VXWORKS, WIND RIVER of WIND RIVER SYSTEMS, INC. ZETEX of Diodes

Zetex Limited.

Last Trademarks Update 2011-11-11

Revision History

Page or Item Subjects (major changes since previous revision)

Revision 2.0, 2012-05-04

All Datasheet layout updated

Table 2-3 Rintlimits tightened

Table 2-3 Ioutlimits tightened


4/26

BCR320U / BCR321U

Table of Contents


Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

List of Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

List o f Tables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1 LED Dr iver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1.1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1.2 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1.3 General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2 Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

3 Typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4 Application hints. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

5 Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Table of Contents


5/26


6/26

BCR320U / BCR321U

List o f Tables


Table 2-1 Maximum Ratings at TA = 25 C, unless otherwise specified . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Table 2-2 Thermal Resistance at TA = 25 C, unless otherwise specified. . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Table 2-3 Electrical Characteristics at TA = 25 C, unless otherwise specified . . . . . . . . . . . . . . . . . . . . . . . . 9

Table 2-4 DC Characteristics with stabilized LED load at TA = 25 C, unless otherwise specified . . . . . . . . 10

List of Tables


7/26

BCR320U / BCR321U

LED Driver


1 LED Driver

1.1 Features

1.2 Applications

Architectural LED lighting

Channel letters for advertising, LED strips for decorative lighting

Retail lighting in fridge, freezer case and vending machines

Emergency lighting (e.g. steps lighting, exit way signs etc.)

1.3 General Description

The BCR320U / BCR321U provides a low-cost solution for driving 0.5 W LEDs with a typical LED current of

150 mA to 200 mA. Internal breakdown voltage is higher than 16 V which is the maximum voltage the LED driver

can sustain when the output is directly connected to supply voltage.

The BCR320U / BCR321U can be operated with a supply voltage of more than 16 V considering the voltage drop

of the LED load which reduces the output voltage to the maximum rating of the driver.

The enable pin of BCR320U can withstand a maximum voltage of 25 V which can be increased adding a series

resistor in front of the enable pin reducing the voltage at the enable pin below 25 V.

The digital input pin of BCR321U allows dimming via a micro controller with frequencies up to 10 kHz.

A reduction of the output current at higher temperatures is the result of the negative temperature coefficient of -

0.2 %/K of the LED driver.

With no need for additional external components like inductors, capacitors and free wheeling diodes, the

BCR320U / BCR321U LED drivers are a cost-efficient and PCB-area saving solution for driving 0.5 W LEDs.

LED drive current preset to 10 mA

Continuous output current up to 250 mA with an external resistor

Easy paralleling of drivers to increase current

Supply voltage up to 25 V

Low side current control

Digital PWM input up to 10 kHz frequency (BCR321U)

Up to 1 W power dissipation in a small SC74 package Negative thermal coefficient of -0.2 %/K reduces output current at higher temperatures

RoHS compliant (Pb-free) package

Automotive qualified according AEC Q101

SC74-3D


8/26

BCR320U / BCR321U

LED Driver


Figure 1-1 Pin configuration and typical application

Type Marking Pin Configuration Package

BCR320U 30 1 = EN 2; 3; 5 = OUT 4 = GND 6 = Rext SC74

BCR321U 31 1 = EN 2; 3; 5 = OUT 4 = GND 6 = Rext SC74

Pin Configuration Typical Application

EN OUT

Rex t

GND

+VS

Vdrop

2,3,51

6

4

IoutIEN

BCR320U

EN

OUT

OUT GND

OUT

Rext1

2

3 4

5

6

Rext(optional )


9/26

BCR320U / BCR321U

Electrical Characteristics


2 Electrical Characteristics

At ten tion: Stresses above the max. values listed here may cause permanent damage to the device.

Exposure to absolute maximum rating condit ions for extended periods may affect device

reliability. Maximum ratings are absolute ratings; exceeding only one of these values may

cause irreversible damage to the integrated circui t.

Table 2-1 Maximum Rat ings at TA = 25 C, unless otherwise specified

Parameter Symbol Values Unit Note / Test Condition

Min. Typ. Max.

Enable voltage

BCR320U

BCR321U

VEN

-

-

-

-

25

4.5

V

Output current Iout - - 300 mA

Output voltage Vout - - 16 V

Reverse voltage between all terminals VR - - 0.5 VTotal power dissipation Ptot - - 1000 mW TS 100 C

Junction temperature TJ - - 150 C

Storage temperature range TSTG -65 - 150 C

Table 2-2 Thermal Resistance at TA = 25 C, unless otherwise specified


Min. Typ. Max.

Junction - soldering point1)

1) For calculation ofRthJAplease refer to Application Note AN077 (Thermal Resistance Calculation)

RthJS - - 50 K/W

Table 2-3 Electrical Characteristics at TA = 25 C, unless otherwise specified


Min. Typ. Max.

Collector-emitter breakdown voltage VBR(CEO) 16 - - V IC = 1 mA,IB = 0

Enable current

BCR320U

BCR321U

IEN

-

-

1.2

1.2

-

-

mA

VEN = 12 V

VEN = 3.3 V

DC current gain hFE 200 350 500 - IC = 50 mA, VCE = 1 V

Internal resistor Rint 85 95 105 IRint = 10 mA

Bias resistor

BCR320U

BCR321U

RB

-

-

10

1.5

-

-

k


10/26

BCR320U / BCR321U

Electrical Characteristics


Output current

BCR320U

BCR321U

Output current atRext = 3

BCR320U

BCR321U

Iout

9

9

-

-

10

10

250

250

11

11

-

-

mA Vout = 1.4 V

VEN = 12 V

VEN = 3.3 V

Vout > 1.4 V

VEN = 12 V

VEN = 3.3 V

Voltage drop (VRext) Vdrop 0.85 0.95 1.05 V Iout = 10 mA

Table 2-4 DC Characteristics with stabilized LED load at TA = 25 C, unless otherwise specified


Min. Typ. Max.

Lowest sufficient supply voltage overhead VSmin - 1.4 - V Iout > 18 mA

Output current change versusTABCR320U

BCR321U

Iout/Iout-

-

-0.2

-0.2

-

-

%/K Vout > 2.0 V

VEN = 12 V

VEN = 3.3 V

Output current change versusVSBCR320U

BCR321U

Iout/Iout-

-

1

1

-

-

%/V Vout > 2.0 V

VEN = 12 V

VEN = 3.3 V

Table 2-3 Electrical Characteristics at TA = 25 C, unless otherwise specified(contd)


Min. Typ. Max.


11/26

BCR320U / BCR321U

Typical characteristics


3 Typical characteristics

Figure 3-1 Total Power DissipationPtot= f(TS)

Figure 3-2 Permissible Pulse LoadRthJS= f(tp)

0

200

400

600

800

1000

1200

0 20 40 60 80 100 120 140

Ptot

[mW]

TS[C]

0.1

1

10

100

10-6

10-5

10-4

10-3

10-2

10-1

100

RthJS[K/W]

tp[s]

D= 0D= 0.005D= 0.01D= 0.02D= 0.05D= 0.1D= 0.2D= 0.5


12/26

BCR320U / BCR321U



Figure 3-3 Permissible Pulse Load Ptotmax / PtotDC= f(tp)

1

10

100

1000

10-6

10-5

10-4

10-3

10-2

10-1

100

Ptotmax

/PtotDC

tp[s]

D= 0D= 0.005D= 0.01D= 0.02D= 0.05D= 0.1D= 0.2D= 0.5


13/26

BCR320U / BCR321U



Figure 3-4 BCR320U: Output Current versus Vout Iout = f(Vout), VEN= 12 V, Rext= Parameter

Figure 3-5 BCR320U: Output Current versus Rext Iout = f(Rext), VEN= 12 V, Vout= Parameter

0

0.1

0.2

0.3

0 1 2 3 4 5 6 7 8 9 10 11 12

Iout[A]

Vout[V]

Rext= open

Rext= 20

Rext= 10

Rext= 6

Rext= 4

Rext= 3

0

0.05

0.1

0.15

0.2

0.25

0.3

0.35

1 10 100

Iout[A]

Rext[]

Vout= 1.4 VVout= 5.4 V


14/26

BCR320U / BCR321U



Figure 3-6 BCR320U: Output Current versus Vout Iout = f(Vout), VEN= 12 V, Rext= open, TA= Parameter

Figure 3-7 BCR320U: Output Current versus Vout Iout = f(Vout), VEN= 12 V, Rext= 20 , TA= Parameter

0

0.005

0.01

0.015

0 2 4 6 8 10 12

Iout[A]

Vout[V]

-40 C25 C85 C

0

0.01

0.02

0.03

0.04

0.05

0.06

0 2 4 6 8 10 12

Iout[A]

Vout[V]

-40 C25 C85 C


15/26

BCR320U / BCR321U



Figure 3-8 BCR320U: Output Current versus Vout Iout = f(Vout), VEN= 12 V, Rext= 3 , TA= Parameter

Figure 3-9 BCR320U: Output Current versus VEN Iout = f(VEN), Vout= 2 V, Rext= open, TA= Parameter

0

0.1

0.2

0.3

0 2 4 6 8 10 12

Iout[A]

Vout[V]

-40 C25 C85 C

0

0.005

0.01

0.015

0 5 10 15 20 25

Iout[A]

VEN[V]

-40 C25 C85 C


16/26

BCR320U / BCR321U



Figure 3-10 BCR320U: Output Current versus VEN Iout = f(VEN), Vout= 2 V, Rext= 20 , TA= Parameter


0

0.01

0.02

0.03

0.04

0.05

0.06

0 5 10 15 20 25

Iout[A]

VEN[V]

-40 C25 C85 C

0

0.1

0.2

0.3

0 5 10 15 20 25

Iout[A]

VEN[V]

-40 C25 C85 C


17/26

BCR320U / BCR321U



Figure 3-12 BCR320U: Output Current versus VEN Iout = f(VEN), Vout= 2 V, Rext= Parameter

Figure 3-13 BCR320U: Enable Current versus VEN IEN = f(VEN), Rext= open, Iout= 0 A, TA= Parameter

0

0.1

0.2

0.3

0 5 10 15 20 25

Iout[A]

VEN[V]

Rext= openRext= 20 Rext= 10 Rext= 6 Rext= 4 Rext= 3

0

0.5

1

1.5

2

2.5

3

0 5 10 15 20 25

IEN[mA]

VEN[V]

-40 C25 C80 C


18/26

BCR320U / BCR321U



Figure 3-14 BCR321U: Output Current versus Vout Iout = f(Vout), VEN= 3.3 V, Rext= Parameter

Figure 3-15 BCR321U: Output Current versus Rext Iout = f(Rext), VEN= 3.3 V, Vout= Parameter

0

0.1

0.2

0.3

0 1 2 3 4 5 6 7 8 9 10 11 12

Iout[A]

Vout[V]

Rext= open

Rext= 20

Rext= 10

Rext= 6

Rext= 4

Rext= 3

0

0.05

0.1

0.15

0.2

0.25

0.3

0.35

1 10 100

Iout[A]

Rext[]

Vout= 1.4 VVout= 5.4 V


19/26

BCR320U / BCR321U



Figure 3-16 BCR321U: Output Current versus Vout Iout = f(Vout), VEN= 3.3 V, Rext= open, TA= Parameter

Figure 3-17 BCR321U: Output Current versus Vout Iout = f(Vout), VEN= 3.3 V, Rext= 20 , TA= Parameter

0

0.005

0.01

0.015

0 2 4 6 8 10 12

Iout[A]

Vout[V]

-40 C25 C85 C

0

0.01

0.02

0.03

0.04

0.05

0.06

0 2 4 6 8 10 12

Iout[A]

Vout[V]

-40 C25 C85 C


20/26

BCR320U / BCR321U



Figure 3-18 BCR321U: Output Current versus Vout Iout = f(Vout), VEN= 3.3 V, Rext= 3 , TA= Parameter

Figure 3-19 BCR321U: Output Current versus VEN Iout = f(VEN), Vout= 2 V, Rext= open, TA= Parameter

0

0.1

0.2

0.3

0 2 4 6 8 10 12

Iout[A]

Vout[V]

-40 C25 C85 C

0

0.005

0.01

0.015

0 1 2 3 4 5

Iout[A]

VEN[V]

-40 C25 C85 C


21/26

BCR320U / BCR321U





0

0.01

0.02

0.03

0.04

0.05

0.06

0 1 2 3 4 5

Iout[A]

VEN[V]

-40 C25 C85 C

0

0.1

0.2

0.3

0 1 2 3 4 5

Iout[A]

VEN[V]

-40 C25 C85 C


22/26

BCR320U / BCR321U



Figure 3-22 BCR321U: Output Current versus VEN Iout = f(VEN), Vout= 2 V, Rext= Parameter

Figure 3-23 BCR321U: Enable Current versus VEN IEN = f(VEN), Rext= open, Iout= 0 A, TA= Parameter

0

0.1

0.2

0.3

0 1 2 3 4 5 6

Iout[A]

VEN[V]

Rext= openRext= 20 Rext= 10 Rext= 6 Rext= 4 Rext= 3

0

1

2

3

4

0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6

IEN[mA]

VEN[V]

-40 C25 C80 C


23/26

BCR320U / BCR321U

Appl ication hints


4 Application hints

Figure 4-1 Application Circuit: Enabling / PWM by Micro Controller

Figure 4-2 Application Circuit: Enabling by Connecting to VS

Appl ication hints

BCR320U / BCR321U serve as an easy to use constant current sources for LEDs. In stand alone application an

external resistor can be connected to adjust the current from 10 mA to 250 mA.Rextcan be determined by using

Figure 3-5or Figure 3-15. Connecting a low tolerance resistorRextwill improve the overall accuracy of the current

sense resistance formed by the parallel connection ofRintandRextleading to an improved current accuracy. Please

take into account that the resulting output currents will be slightly lower due to the self heating of the component

and the negative thermal coefficient.

Please visit our web site www.infineon.com/lowcostleddriver for application notes and for up-to-date

application information.

EN OUT

Rext

GND

+VS

2,3,51

IoutIEN

BCR321U

C

Vdrop6

4

Rex t(optional )

EN OUT

Rex t

GND

+VS

Vdrop

2,3,51

6

4

IoutIEN

BCR320U

Rext(optional )
http://www.infineon.com/lowcostleddriverhttp://www.infineon.com/lowcostleddriver


24/26

BCR320U / BCR321U

Package


5 Package

Figure 5-1 Package Outline for SC74 (dimensions in mm)

Figure 5-2 Package Footprint for SC74 (dimensions in mm)

Figure 5-3 Tape and Reel Information for SC74 (dimensions in mm)

SC74-PO V04

5 46

321

1.1 MAX.

(0.35)

(2.25)

0.22.9B

0.2

+0.1-0.050.35

Pin 1

marking

M B 6x0.95

1.9

0.15 -0.06+0.1

1.

6

A

0.1

2.

5

0.

25

0.1

0.1

A0.2 M

0.1 MAX.

0.5

0.95

1.

9

2.

9

SC74-FPR V04

SC74-TP

2.

7

4

3.15Pin 1marking

8

0.2

1.15


25/26

BCR320U / BCR321U

Terminology


Terminology

Iout/Iout Output current change

hFE DC current gain

IEN Enable current

Iout Output current

IR Reverse current

LED Light Emitting Diode

PCB Printed Circuit Board

Ptot Total power dissipation

PWM Pulse Width Modulation

RB Bias resistor

Rext External resistor

Rint Internal resistor

RoHs Restriction of Hazardous Substance directive

RthJS Thermal resistance junction to soldering point

TA Ambient temperature

TJ Junction temperature

TS Soldering point temperature

Tstg Storage temperature

VBR(CEO) Collector-emitter breakdown voltage

VBR Breakdown voltage

Vdrop Voltage drop

VEN Enable voltage

Vout Output voltage

VR Reverse voltage

VS Supply voltage

VSmin Lowest sufficient supply voltage overhead


26/26

w w w . i n f i n e o n . c o m
http://www.infineon.com/http://www.infineon.com/

bcr320u bcr321u led driver rev2.0

Documents