75V input, 500 mA buck LED driver with PWM dimming
The Texas Instruments LM3402HVMRX/NOPB is a constant-current buck LED driver that accepts a 6 V to 75 V input supply and delivers up to 500 mA to a single LED string.
Wide input range and thermal performance
The 8-PowerSOIC package with exposed thermal pad (8-SO PowerPad) pulls heat into the PCB copper plane.
PWM dimming and application fit
PWM dimming is supported directly on the dimming input, letting the LED string be pulsed at frequencies above visible flicker. The 1 MHz switching frequency means the PWM dimming ratio is limited by the minimum on-time of the internal switch, not by the switching period — a 100 Hz dimming signal can achieve ratios over 1000:1. The part is listed for general lighting applications and is commonly used in architectural, signage, and automotive exterior lighting where a single high-voltage rail feeds multiple LED strings.