BCR421UW6 Overview
The BCR420UW6 and BCR421UW6 monolithically integrate transistors, diodes, and resistors to function as a Constant Current Regulator (CCR) for linear LED driving. Each 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.
BCR421UW6 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 1W in SOT26
- 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)
- Automotive-pliant parts are available under separate
BCR421UW6 Applications
- 10mA ± 10% Constant Current (Preset) IOUT up to 350mA Adjustable with an External Resistor
- 40V Supply Voltage PD up to 1W in SOT26 Low-Side Control Enabling PWM Input < 25kHz (BCR421U) Negative Temperature Coefficient (NTC) Reduces IOUT with