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 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
Interior and Exterior Automotive LED Lighting
Dome and Mood Lighting
Puddle Lighting
Side Marker Lights
Edge Lighting Strips