BCR320U / BCR321U

LED Driver
BCR 320U E6327 / BCR 321U E6327
Datasheet
Revision 2.1, 2015-01-28
Power Management & Multimarket
Edition 2015-01-28
Published by
Infineon Technologies AG
81726 Munich, Germany
© 2015 Infineon Technologies AG
All Rights Reserved.
Legal Disclaimer
The information given in this document shall in no event be regarded as a guarantee of conditions or
characteristics. With respect to any examples or hints given herein, any typical values stated herein and/or any
information regarding the application of the device, Infineon Technologies hereby disclaims any and all warranties
and liabilities of any kind, including without limitation, warranties of non-infringement of intellectual property rights
of any third party.
Information
For further information on technology, delivery terms and conditions and prices, please contact the nearest
Infineon Technologies Office (www.infineon.com).
Warnings
Due to technical requirements, components may contain dangerous substances. For information on the types in
question, please contact the nearest Infineon Technologies Office.
Infineon Technologies components may be used in life-support devices or systems only with the express written
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be endangered.
BCR 320U E6327 / BCR 321U E6327
Revision History
Page or Item
Subjects (major changes since previous revision)
Revision 2.1, 2015-01-28
All
Using full sales names BCR 320U E6327 / BCR 321U E6327 instead of short form BCR320U
/ BCR321U
Page 7
Halogen free logo removed
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™, I²RF™,
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™, µVision™ 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 Data
Association 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
Datasheet
3
Revision 2.1, 2015-01-28
BCR 320U E6327 / BCR 321U E6327
Table of Contents
Table of Contents
Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
List of Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
List of Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1
1.1
1.2
1.3
LED Driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7
7
7
7
2
Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3
Typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4
Application hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5
Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Datasheet
4
Revision 2.1, 2015-01-28
BCR 320U E6327 / BCR 321U E6327
List of Figures
List of Figures
Figure 1-1
Figure 3-1
Figure 3-2
Figure 3-3
Figure 3-4
Figure 3-5
Figure 3-6
Figure 3-7
Figure 3-8
Figure 3-9
Figure 3-10
Figure 3-11
Figure 3-12
Figure 3-13
Figure 3-14
Figure 3-15
Figure 3-16
Figure 3-17
Figure 3-18
Figure 3-19
Figure 3-20
Figure 3-21
Figure 3-22
Figure 3-23
Figure 4-1
Figure 4-2
Figure 5-1
Figure 5-2
Figure 5-3
Datasheet
Pin configuration and typical application. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Total Power Dissipation Ptot = f(TS). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Permissible Pulse Load RthJS = f(tp) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Permissible Pulse Load Ptotmax / PtotDC= f(tp) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
BCR 320U: Output Current versus Vout Iout = f(Vout), VEN = 12 V, Rext = Parameter . . . . . . . . . . . . 13
BCR 320U: Output Current versus Rext Iout = f(Rext), VEN = 12 V, Vout = Parameter . . . . . . . . . . . . 13
BCR 320U: Output Current versus Vout Iout = f(Vout), VEN = 12 V, Rext = open, TA = Parameter . . . 14
BCR 320U: Output Current versus Vout Iout = f(Vout), VEN = 12 V, Rext = 20 Ω, TA = Parameter. . . . 14
BCR 320U: Output Current versus Vout Iout = f(Vout), VEN = 12 V, Rext = 3 Ω, TA = Parameter. . . . . 15
BCR 320U: Output Current versus VEN Iout = f(VEN), Vout = 2 V, Rext = open, TA = Parameter . . . . 15
BCR 320U: Output Current versus VEN Iout = f(VEN), Vout = 2 V, Rext = 20 Ω, TA = Parameter. . . . . 16
BCR 320U: Output Current versus VEN Iout = f(VEN), Vout = 2 V, Rext = 3 Ω, TA = Parameter. . . . . . 16
BCR 320U: Output Current versus VEN Iout = f(VEN), Vout = 2 V, Rext = Parameter . . . . . . . . . . . . . 17
BCR 320U: Enable Current versus VEN IEN = f(VEN), Rext = open, Iout = 0 A, TA = Parameter . . . . . 17
BCR 321U: Output Current versus Vout Iout = f(Vout), VEN = 3.3 V, Rext = Parameter . . . . . . . . . . . . 18
BCR 321U: Output Current versus Rext Iout = f(Rext), VEN = 3.3 V, Vout = Parameter . . . . . . . . . . . . 18
BCR 321U: Output Current versus Vout Iout = f(Vout), VEN = 3.3 V, Rext = open, TA = Parameter . . . 19
BCR 321U: Output Current versus Vout Iout = f(Vout), VEN = 3.3 V, Rext = 20 Ω, TA = Parameter . . . 19
BCR 321U: Output Current versus Vout Iout = f(Vout), VEN = 3.3 V, Rext = 3 Ω, TA = Parameter . . . . 20
BCR 321U: Output Current versus VEN Iout = f(VEN), Vout = 2 V, Rext = open, TA = Parameter . . . . 20
BCR 321U: Output Current versus VEN Iout = f(VEN), Vout = 2 V, Rext = 20 Ω, TA = Parameter. . . . . 21
BCR 321U: Output Current versus VEN Iout = f(VEN), Vout = 2 V, Rext = 3 Ω, TA = Parameter. . . . . . 21
BCR 321U: Output Current versus VEN Iout = f(VEN), Vout = 2 V, Rext = Parameter . . . . . . . . . . . . . 22
BCR 321U: Enable Current versus VEN IEN = f(VEN), Rext = open, Iout = 0 A, TA = Parameter . . . . . 22
Application Circuit: Enabling / PWM by Micro Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Application Circuit: Enabling by Connecting to VS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Package Outline for SC74 (dimensions in mm) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Package Footprint for SC74 (dimensions in mm) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Tape and Reel Information for SC74 (dimensions in mm) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5
Revision 2.1, 2015-01-28
BCR 320U E6327 / BCR 321U E6327
List of Tables
List of Tables
Table 2-1
Table 2-2
Table 2-3
Table 2-4
Datasheet
Maximum Ratings at TA = 25 °C, unless otherwise specified . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Thermal Resistance at TA = 25 °C, unless otherwise specified. . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Electrical Characteristics at TA = 25 °C, unless otherwise specified . . . . . . . . . . . . . . . . . . . . . . . . 9
DC Characteristics with stabilized LED load at TA = 25 °C, unless otherwise specified . . . . . . . . 10
6
Revision 2.1, 2015-01-28
BCR 320U E6327 / BCR 321U E6327
LED Driver
1
LED Driver
1.1
Features
•
•
•
•
•
•
•
•
•
•
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 (BCR 321U E6327)
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
1.2
•
•
•
•
SC74-3D
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 BCR 320U E6327 / BCR 321U E6327 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 BCR 320U E6327 / BCR 321U E6327 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 BCR 320U E6327 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 BCR 321U E6327 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 BCR
320U E6327 / BCR 321U E6327 LED drivers are a cost-efficient and PCB-area saving solution for driving 0.5 W
LEDs.
Datasheet
7
Revision 2.1, 2015-01-28
BCR 320U E6327 / BCR 321U E6327
LED Driver
Pin Configuration
Typical Application
+VS
EN
1
6
Rex t
IEN
EN
OUT
2
5
OUT
OUT
3
4
GND
Iout
1 OUT 2,3,5
Rex t
6
GND
Rex t
(optional )
Vdrop
4
BCR 320 U E6327
Figure 1-1 Pin configuration and typical application
Sales Name
Marking
BCR 320U E6327
30
1 = EN
2; 3; 5 = OUT 4 = GND
6 = Rext
SC74
BCR 321U E6327
31
1 = EN
2; 3; 5 = OUT 4 = GND
6 = Rext
SC74
Datasheet
Pin Configuration
8
Package
Revision 2.1, 2015-01-28
BCR 320U E6327 / BCR 321U E6327
Electrical Characteristics
2
Electrical Characteristics
Table 2-1
Maximum Ratings at TA = 25 °C, unless otherwise specified
Parameter
Symbol
Values
Unit
Min.
Typ.
Max.
-
-
25
4.5
Enable voltage
BCR 320U E6327
BCR 321U E6327
VEN
Output current
Iout
-
-
300
mA
Output voltage
Vout
-
-
16
V
Reverse voltage between all terminals
VR
-
-
0.5
V
Total power dissipation
Ptot
-
-
1000
mW
Junction temperature
TJ
-
-
150
°C
Storage temperature range
TSTG
-65
-
150
°C
Note / Test Condition
V
TS ≤ 100 °C
Attention: Stresses above the max. values listed here may cause permanent damage to the device.
Exposure to absolute maximum rating conditions 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 circuit.
Table 2-2
Thermal Resistance at TA = 25 °C, unless otherwise specified
Parameter
Symbol
Values
Min.
Typ.
Unit
Note / Test Condition
Max.
1)
Junction - soldering point
RthJS
50
K/W
1) For calculation of RthJA please refer to Application Note AN077 (Thermal Resistance Calculation)
Table 2-3
Electrical Characteristics at TA = 25 °C, unless otherwise specified
Parameter
Symbol
Values
Min.
Typ.
Max.
-
-
-
1.2
1.2
-
Unit
Note / Test Condition
V
IC = 1 mA, IB = 0
Collector-emitter breakdown voltage
VBR(CEO) 16
Enable current
BCR 320U E6327
BCR 321U E6327
IEN
DC current gain
hFE
200
350
500
-
IC = 50 mA, VCE = 1 V
Internal resistor
Rint
85
95
105
Ω
IRint = 10 mA
Bias resistor
BCR 320U E6327
BCR 321U E6327
RB
-
10
1.5
-
Datasheet
mA
VEN = 12 V
VEN = 3.3 V
kΩ
9
Revision 2.1, 2015-01-28
BCR 320U E6327 / BCR 321U E6327
Electrical Characteristics
Table 2-3
Electrical Characteristics at TA = 25 °C, unless otherwise specified (cont’d)
Parameter
Symbol
Output current
BCR 320U E6327
BCR 321U E6327
Output current at Rext = 3 Ω
BCR 320U E6327
BCR 321U E6327
Iout
Voltage drop (VRext)
Vdrop
Table 2-4
Min.
Typ.
Max.
9
9
10
10
11
11
-
250
250
-
0.85
0.95
1.05
Unit
Note / Test Condition
mA
Vout = 1.4 V
VEN = 12 V
VEN = 3.3 V
Vout > 1.4 V
VEN = 12 V
VEN = 3.3 V
V
Iout = 10 mA
DC Characteristics with stabilized LED load at TA = 25 °C, unless otherwise specified
Parameter
Symbol
Lowest sufficient supply voltage overhead VSmin
Output current change versusTA
BCR 320U E6327
BCR 321U E6327
∆Iout/Iout
Output current change versus VS
BCR 320U E6327
BCR 321U E6327
∆Iout/Iout
Datasheet
Values
Values
Min.
Typ.
Max.
-
1.4
-
-
-0.2
-0.2
-
-
1
1
10
-
Unit
Note / Test Condition
V
Iout > 18 mA
%/K
Vout > 2.0 V
VEN = 12 V
VEN = 3.3 V
%/V
Vout > 2.0 V
VEN = 12 V
VEN = 3.3 V
Revision 2.1, 2015-01-28
BCR 320U E6327 / BCR 321U E6327
Typical characteristics
3
Typical characteristics
1200
1000
Ptot [mW]
800
600
400
200
0
0
20
40
60
80
TS [°C]
100
120
140
Figure 3-1 Total Power Dissipation Ptot = f(TS)
RthJS [K/W]
100
10
D=0
D = 0.005
D = 0.01
D = 0.02
D = 0.05
D = 0.1
D = 0.2
D = 0.5
1
0.1
-6
10
10
-5
10
-4
-3
10
tp [s]
10
-2
10
-1
0
10
Figure 3-2 Permissible Pulse Load RthJS = f(tp)
Datasheet
11
Revision 2.1, 2015-01-28
BCR 320U E6327 / BCR 321U E6327
Typical characteristics
Ptotmax / PtotDC
1000
D=0
D = 0.005
D = 0.01
D = 0.02
D = 0.05
D = 0.1
D = 0.2
D = 0.5
100
10
1
10-6
10-5
10-4
10-3
tp [s]
10-2
10-1
100
Figure 3-3 Permissible Pulse Load Ptotmax / PtotDC= f(tp)
Datasheet
12
Revision 2.1, 2015-01-28
BCR 320U E6327 / BCR 321U E6327
Typical characteristics
0.3
Rext = 3 Ω
Rext = 4 Ω
Iout [A]
0.2
Rext = 6 Ω
Rext = 10 Ω
0.1
Rext = 20 Ω
0
Rext = open
0
1
2
3
4
5
6
7
Vout [V]
8
9
10
11
12
Figure 3-4 BCR 320U: Output Current versus Vout Iout = f(Vout), VEN = 12 V, Rext = Parameter
0.35
0.3
Iout [A]
0.25
0.2
0.15
0.1
0.05
0
Vout = 1.4 V
Vout = 5.4 V
1
10
Rext [Ω]
100
Figure 3-5 BCR 320U: Output Current versus Rext Iout = f(Rext), VEN = 12 V, Vout = Parameter
Datasheet
13
Revision 2.1, 2015-01-28
BCR 320U E6327 / BCR 321U E6327
Typical characteristics
0.015
Iout [A]
0.01
0.005
0
-40 °C
25 °C
85 °C
0
2
4
6
Vout [V]
8
10
12
Figure 3-6 BCR 320U: Output Current versus Vout Iout = f(Vout), VEN = 12 V, Rext = open, TA = Parameter
0.06
0.05
Iout [A]
0.04
0.03
0.02
0.01
0
-40 °C
25 °C
85 °C
0
2
4
6
Vout [V]
8
10
12
Figure 3-7 BCR 320U: Output Current versus Vout Iout = f(Vout), VEN = 12 V, Rext = 20 Ω, TA = Parameter
Datasheet
14
Revision 2.1, 2015-01-28
BCR 320U E6327 / BCR 321U E6327
Typical characteristics
0.3
Iout [A]
0.2
0.1
0
-40 °C
25 °C
85 °C
0
2
4
6
Vout [V]
8
10
12
Figure 3-8 BCR 320U: Output Current versus Vout Iout = f(Vout), VEN = 12 V, Rext = 3 Ω, TA = Parameter
0.015
Iout [A]
0.01
0.005
0
-40 °C
25 °C
85 °C
0
5
10
15
20
25
VEN [V]
Figure 3-9 BCR 320U: Output Current versus VEN Iout = f(VEN), Vout = 2 V, Rext = open, TA = Parameter
Datasheet
15
Revision 2.1, 2015-01-28
BCR 320U E6327 / BCR 321U E6327
Typical characteristics
0.06
0.05
Iout [A]
0.04
0.03
0.02
0.01
0
-40 °C
25 °C
85 °C
0
5
10
15
20
25
VEN [V]
Figure 3-10 BCR 320U: Output Current versus VEN Iout = f(VEN), Vout = 2 V, Rext = 20 Ω, TA = Parameter
0.3
Iout [A]
0.2
0.1
0
-40 °C
25 °C
85 °C
0
5
10
15
20
25
VEN [V]
Figure 3-11 BCR 320U: Output Current versus VEN Iout = f(VEN), Vout = 2 V, Rext = 3 Ω, TA = Parameter
Datasheet
16
Revision 2.1, 2015-01-28
BCR 320U E6327 / BCR 321U E6327
Typical characteristics
0.3
Rext = open
Rext = 20 Ω
Rext = 10 Ω
Rext = 6 Ω
Rext = 4 Ω
Rext = 3 Ω
Iout [A]
0.2
0.1
0
0
5
10
15
20
25
VEN [V]
Figure 3-12 BCR 320U: Output Current versus VEN Iout = f(VEN), Vout = 2 V, Rext = Parameter
3
2.5
IEN [mA]
2
1.5
1
0.5
0
-40 °C
25 °C
80 °C
0
5
10
15
20
25
VEN [V]
Figure 3-13 BCR 320U: Enable Current versus VEN IEN = f(VEN), Rext = open, Iout = 0 A, TA = Parameter
Datasheet
17
Revision 2.1, 2015-01-28
BCR 320U E6327 / BCR 321U E6327
Typical characteristics
0.3
Rext = 3 Ω
Rext = 4 Ω
Iout [A]
0.2
Rext = 6 Ω
Rext = 10 Ω
0.1
Rext = 20 Ω
0
Rext = open
0
1
2
3
4
5
6
7
Vout [V]
8
9
10
11
12
Figure 3-14 BCR 321U: Output Current versus Vout Iout = f(Vout), VEN = 3.3 V, Rext = Parameter
0.35
0.3
Iout [A]
0.25
0.2
0.15
0.1
0.05
0
Vout = 1.4 V
Vout = 5.4 V
1
10
Rext [Ω]
100
Figure 3-15 BCR 321U: Output Current versus Rext Iout = f(Rext), VEN = 3.3 V, Vout = Parameter
Datasheet
18
Revision 2.1, 2015-01-28
BCR 320U E6327 / BCR 321U E6327
Typical characteristics
0.015
Iout [A]
0.01
0.005
0
-40 °C
25 °C
85 °C
0
2
4
6
Vout [V]
8
10
12
Figure 3-16 BCR 321U: Output Current versus Vout Iout = f(Vout), VEN = 3.3 V, Rext = open, TA = Parameter
0.06
0.05
Iout [A]
0.04
0.03
0.02
0.01
0
-40 °C
25 °C
85 °C
0
2
4
6
Vout [V]
8
10
12
Figure 3-17 BCR 321U: Output Current versus Vout Iout = f(Vout), VEN = 3.3 V, Rext = 20 Ω, TA = Parameter
Datasheet
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Revision 2.1, 2015-01-28
BCR 320U E6327 / BCR 321U E6327
Typical characteristics
0.3
Iout [A]
0.2
0.1
0
-40 °C
25 °C
85 °C
0
2
4
6
Vout [V]
8
10
12
Figure 3-18 BCR 321U: Output Current versus Vout Iout = f(Vout), VEN = 3.3 V, Rext = 3 Ω, TA = Parameter
0.015
Iout [A]
0.01
0.005
0
-40 °C
25 °C
85 °C
0
1
2
3
4
5
VEN [V]
Figure 3-19 BCR 321U: Output Current versus VEN Iout = f(VEN), Vout = 2 V, Rext = open, TA = Parameter
Datasheet
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Revision 2.1, 2015-01-28
BCR 320U E6327 / BCR 321U E6327
Typical characteristics
0.06
0.05
Iout [A]
0.04
0.03
0.02
0.01
0
-40 °C
25 °C
85 °C
0
1
2
3
4
5
VEN [V]
Figure 3-20 BCR 321U: Output Current versus VEN Iout = f(VEN), Vout = 2 V, Rext = 20 Ω, TA = Parameter
0.3
Iout [A]
0.2
0.1
0
-40 °C
25 °C
85 °C
0
1
2
3
4
5
VEN [V]
Figure 3-21 BCR 321U: Output Current versus VEN Iout = f(VEN), Vout = 2 V, Rext = 3 Ω, TA = Parameter
Datasheet
21
Revision 2.1, 2015-01-28
BCR 320U E6327 / BCR 321U E6327
Typical characteristics
0.3
Rext = open
Rext = 20 Ω
Rext = 10 Ω
Rext = 6 Ω
Rext = 4 Ω
Rext = 3 Ω
Iout [A]
0.2
0.1
0
0
1
2
3
VEN [V]
4
5
6
Figure 3-22 BCR 321U: Output Current versus VEN Iout = f(VEN), Vout = 2 V, Rext = Parameter
4
IEN [mA]
3
2
1
0
-40 °C
25 °C
80 °C
0
0.5
1
1.5
2
2.5
3 3.5
VEN [V]
4
4.5
5
5.5
6
Figure 3-23 BCR 321U: Enable Current versus VEN IEN = f(VEN), Rext = open, Iout = 0 A, TA = Parameter
Datasheet
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BCR 320U E6327 / BCR 321U E6327
Application hints
4
Application hints
+V S
µC
IEN
EN
Iout
1 OUT 2,3,5
Rex t
6
GND
Rex t
(optional )
Vdrop
4
BCR 321U E6327
Figure 4-1 Application Circuit: Enabling / PWM by Micro Controller
+V S
EN
IEN
Iout
1 OUT
2,3,5
Rex t
6
GND
R ex t
(optional )
V drop
4
BCR 320U E6327
Figure 4-2 Application Circuit: Enabling by Connecting to VS
Application hints
BCR 320U E6327 / BCR 321U E6327 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. Rext can be
determined by using Figure 3-5 or Figure 3-15. Connecting a low tolerance resistor Rext will improve the overall
accuracy of the current sense resistance formed by the parallel connection of Rint and Rext leading 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.
Datasheet
23
Revision 2.1, 2015-01-28
BCR 320U E6327 / BCR 321U E6327
Package
Package
2.9 ±0.2
(2.25)
B
1.1 MAX.
0.15 +0.1
-0.06
5
4
1
2
3
0.35 +0.1
-0.05
Pin 1
marking
0.2
1.6 ±0.1
6
2.5 ±0.1
(0.35)
0.25 ±0.1
5
A
B 6x
M
0.1 MAX.
0.95
0.2
1.9
M
A
SC74-PO V04
Figure 5-1 Package Outline for SC74 (dimensions in mm)
2.9
1.9
0.5
0.95
SC74-FPR V04
Figure 5-2 Package Footprint for SC74 (dimensions in mm)
0.2
2.7
8
4
Pin 1
marking
3.15
1.15
SC74-TP
Figure 5-3 Tape and Reel Information for SC74 (dimensions in mm)
Datasheet
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Revision 2.1, 2015-01-28
BCR 320U E6327 / BCR 321U E6327
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
Datasheet
25
Revision 2.1, 2015-01-28
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Published by Infineon Technologies AG
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