BCR401UW6Q
10mA to 100mA LED CONSTANT CURRENT REGULATOR IN SOT26/SC74R
Description
This Linear LED driver is designed to meet the stringent requirements
of automotive applications.
The BCR401U monolithically integrates a transistor, diodes and
resistors to function as a Constant Current Regulator (CCR) for LED
driving. The device regulates with a preset 10mA nominal that can be
adjusted with external resistor up to 100mA. It is designed for driving
LEDs in strings and will reduce current at increasing temperatures to
self-protect. Operating as a series linear CCR for LED string current
control, it can be used in applications with supply voltages up to 40V.
With no need for additional external components, this CCR is fully
integrated into a SOT26/SC74R minimizing PCB area and component
count.
Features
LED Constant Current Regulator Using PNP Emitter-Follower with
Emitter Resistor to Current Limit
I
OUT
= 10mA ± 10% Constant Current (Preset)
I
OUT
up to 100mA Adjustable with An External Resistor
V
S
– 40V Supply Voltage
P
D
up to 1W in SOT26/SC74R
LED Dimming Using PWM up to 25kHz
Negative Temperature Coefficient (NTC) Reduces I
OUT
with
Increasing Temperature
Parallel Devices to Increase Regulated Current
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Qualified to AEC-Q101 Standards for High Reliability
PPAP Capable (Note 4)
Applications
Constant current regulation (CCR) in automotive LED lighting:
Interior and Exterior Automotive LED Lighting
Dome and Mood Lighting
Puddle Lighting
Side Marker Lights
Mechanical Data
Case: SOT26/SC74R
Case Material: Molded Plastic. ―Green‖ Molding Compound. UL
Flammability Rating 94V-0
Moisture Sensitivity: Level 1 per J-STD-020
Terminals: Finish - Matte Tin Plated Leads, Solderable per
MIL-STD-202, Method 208
Weight: 0.018 grams (Approximate)
SOT26/SC74R
GND
OUT
OUT
Rext
OUT
V
S
Pin Name
V
S
OUT
Rext
GND
Top View
Pin-Out
Internal Device
Schematic
Pin Function
Supply Voltage
Regulated Output Current
External resistor for
adjusting Output Current
Power Ground
Top View
Ordering Information
(Note 5)
Part Number
BCR401UW6Q-7
Notes:
Compliance
Automotive
Marking
401
Reel Size (inches)
7
Tape Width (mm)
8
Quantity Per Reel
3,000
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
and Lead-free.
3. Halogen- and Antimony-free "Green‖ products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
4. Automotive products are AEC-Q101 qualified and are PPAP capable. Refer to http://www.diodes.com/product_compliance_definitions.html.
5. For packaging details, go to our website at http://www.diodes.com/products/packages.html.
BCR401UW6Q
Document number: DS38938 Rev. 1 - 2
1 of 13
www.diodes.com
January 2017
© Diodes Incorporated
BCR401UW6Q
Marking Information
SOT26/SC74R
401
401 = Part Marking (See Ordering Information)
YM = Date Code Marking
Y = Year (ex: D = 2016)
M = Month (ex: 9 = September)
Date Code Key
Year
Code
Month
Code
2016
D
Jan
1
Feb
2
2017
E
Mar
3
Apr
4
2018
F
May
5
2019
G
Jun
6
Jul
7
2020
H
Aug
8
Sep
9
2021
I
Oct
O
Nov
N
2022
J
Dec
D
Absolute Maximum Ratings
(Voltage relative to GND, @T
A
= +25° unless otherwise specified.)
C,
Characteristic
Supply Voltage
Output Current
Output Voltage
Reverse Voltage Between All Terminals
Symbol
V
S
I
OUT
V
OUT
V
R
Value
40
100
40
0.5
Unit
V
mA
V
V
Thermal Characteristics
Characteristic
Power Dissipation
Thermal Resistance, Junction to Ambient
Thermal Resistance, Junction to Lead
(Note 6)
(Note 7)
(Note 6)
(Note 7)
(Note 8)
Symbol
P
D
R
θJA
R
θJL
T
J
T
J
, T
STG
Value
1,190
912
105
137
50
-55 to +150
-65 to +150
°
C
Unit
mW
°
C/W
Recommended Operating Junction Temperature Range
Maximum Operating Junction and Storage Temperature Range
ESD Ratings
(Note 9)
Characteristics
Electrostatic Discharge – Human Body Model
Electrostatic Discharge – Machine Model
Notes:
Symbols
ESD HBM
ESD MM
Value
800
300
Unit
V
V
JEDEC Class
1B
B
6. For a device mounted with the OUT leads on 50mm x 50mm 2oz copper that is on a single-sided 1.6mm FR-4 PCB; device is measured under still
air conditions while operating in steady-state.
7. Same as Note 6, except mounted on 15mm x 15mm 1oz copper.
8. R
θJL
= Thermal resistance from junction to solder-point (at the end of the OUT leads).
9. Refer to JEDEC specification JESD22-A114 and JESD22-A115
.
BCR401UW6Q
Document number: DS38938 Rev. 1 - 2
2 of 13
www.diodes.com
January 2017
© Diodes Incorporated
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