BCR421UFD Overview
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. It is designed for driving LEDs in strings and will reduce current at increasing temperatures to self-protect.
BCR421UFD Key Features
- LED Constant Current Regulator Using NPN Emitter-Follower with Emitter Resistor to Current Limit
- 10mA ±10% Constant Current (Preset)
- IOUT up to 350mA Adjustable with an External Resistor
- 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)
- Parallel Devices to Increase Regulated Current
- Totally Lead-Free & Fully RoHS pliant (Notes 1 & 2)
- Halogen and Antimony Free. “Green” Device (Note 3)
BCR421UFD Applications
- 10mA ±10% Constant Current (Preset) IOUT up to 350mA Adjustable with an External Resistor
