BCR420UW6Q / BCR421UW6Q
LINEAR LED CONSTANT CURRENT REGULATOR IN SOT26
Description
Features
These linear LED drivers are designed to meet the stringent
requirements of automotive applications.
LED Constant Current Regulator using NPN Emitter-Follower with
Emitter Resistor to Current Limit
IOUT – 10mA ± 10% Constant Current (Preset)
IOUT up to 350mA Adjustable with an External Resistor
(BCR421UW6Q)
The BCR420UW6Q and BCR421UW6Q monolithically integrate
transistors, diodes, and resistors to function as a Constant Current
Regulator (CCR) for linear LED driving. The device regulates with a
preset 10mA nominal that can be adjusted with an external resistor up
to 350mA. 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, the device can be
used in multiple applications, as long as the maximum supply voltage
to the device is < 40V.
VOUT – 40V Supply Voltage
PD up to 1W in SOT26
Low-Side Control Enabling PWM Input < 25kHz (BCR421UW6Q)
Negative Temperature Coefficient (NTC) Reduces IOUT 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)
The BCR420UW6Q and BCR420UW6Q are suitable for
automotive applications requiring specific change control;
these parts are AEC-Q100 qualified, PPAP capable, and
manufactured in IATF16949 certified facilities.
https://www.diodes.com/quality/product-definitions/
With the low-side control, the BCR421UW6Q has an Enable (EN) pin
which can be pulse-width modulated (PWM) up to 25 kHz by a micro-
controller for LED dimming.
With no need for additional external components, this CCR is fully
integrated into the SOT26 package, minimizing PCB area and
component count.
Mechanical Data
Applications
Package: SOT26
Constant Current Regulation (CCR) in:
Package Material: Molded Plastic. “Green” Molding Compound.
UL Flammability Rating 94V-0
Automotive interior lighting
Mood and decorative lighting
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
EN
OUT
Pin Name
Pin Function
EN
REXT
OUT
GND
OUT
Regulated Output Current
Enable for Biasing
Transistor
OUT
OUT
EN
R
EXT
(Optional)
External Resistor for
Adjusting Output Current
REXT
GND
Power Ground
GND
Top View
Pin-Out
Top View
Internal Device
Schematic
Ordering Information (Note 4)
Product
BCR420UW6Q-7
BCR421UW6Q-7
Compliance
Automotive
Automotive
Marking
420
421
Reel Size (inches)
Tape Width (mm)
Quantity per Reel
3,000
7
7
8
8
3,000
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.
2. See https://www.diodes.com/quality/lead-free/ 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. For packaging details, go to our website at https://www.diodes.com/design/support/packaging/diodes-packaging/.
1 of 13
www.diodes.com
January 2022
© Diodes Incorporated
BCR420UW6Q / BCR421UW6Q
Document number: DS38302 Rev. 5 - 2
5秒后页面跳转
资料手册解读：UC3842参数和管脚说明
一文带你了解无源晶振的负载电容为何要加两颗谐振电容CL1和CL2
玻璃管保险丝与陶瓷管保险丝：区别与替代性探讨
PCF8574资料解读：主要参数分析、引脚说明
微信公众号
抖音公众号
浙公网安备 33010502006866号 浙ICP备10014259号-119
营业执照ICP证
数据手册
如果您发现信息不准确，
