Download the BCR421UFD datasheet PDF.
This datasheet also covers the BCR420UFD variant, as both devices belong to the same linear led constant current regulator family and are provided as variant models within a single manufacturer datasheet.
General Description
The BCR420UFD and BCR421UFD 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.
Key Features
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
(BCR421U).
VOUT.
40V Supply Voltage.
PD up to 1.7W in U-DFN2020-6 Package.
0.6mm Height for Low-Profile Edge Lighting.
Low-Side Control Enabling PWM Input < 25kHz (BCR421U).
Negative Temperature Coefficient (NTC) Reduces IOUT with
Increasing Temp.
Full PDF Text Transcription for BCR421UFD (Reference)
Note: Below is a high-fidelity text extraction (approx. 800 characters) for
BCR421UFD. For precise diagrams, and layout, please refer to the original PDF.
BCR420UFD / BCR421UFD LINEAR LED CONSTANT CURRENT REGULATOR IN DFN2020-6 Description The BCR420UFD and BCR421UFD monolithically integrate transistors, diodes and resistor...
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nd BCR421UFD 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, it can be used in multiple applications, as long as the maximum supply voltage to the device is < 40V. With the low-side control, the BCR421UFD has an Enable (EN) pin which can be pulse-width modulate
BCR421UFD Datasheet
