BCR420UFD / BCR421UFD
LINEAR LED CONSTANT CURRENT REGULATOR IN U-DFN2020-6 Description Features The BCR420U and BCR421U 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. п‚ 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 п‚ п‚ п‚ п‚ п‚ п‚ 0.6mm Height for Low-profile Edge Lighting
Low-Side Control Enabling PWM Input < 25kHz (BCR421U)
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)
Automotive-Compliant Parts are Available Under Separate …