BCR420UFDQ

BCR420UFDQ / BCR421UFDQ LINEAR LED CONSTANT CURRENT REGULATOR IN U-DFN2020-6 Description These Linear LED drivers are designed to meet the stringent requirements of automotive applications. 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. With the low-side control, the BCR421U has an Enable (EN) pin which can be pulse-width modulated (PWM) up to 25kHz by a microcontroller for LED dimming. Features  LED Constant Current Regulator Using NPN Emitter-Follower with Emitter Resistor to Current Limit ...