Buck LED driver for automotive and general lighting
The LM3404MA/NOPB is a constant-current step-down (buck) LED driver from Texas Instruments, designed to drive a single string of LEDs at up to 1 A with integrated switch. Its 1 MHz switching frequency lets the designer use a small inductor, which helps keep the total solution footprint tight for space-constrained lamp modules or daytime-running-light boards. The input range of 6 V to 42 V covers the typical automotive battery rail through cold-crank and load-dump transients without requiring an external pre-regulator.
Temperature range and lighting-grade qualification
PWM dimming and single-output drive
PWM dimming is supported directly, allowing the LED current to be chopped at a user-defined duty cycle for brightness control without shifting the colour temperature. The single output channel delivers a regulated 1 A, which means the LM3404MA/NOPB is a direct fit for a single high-power LED or a small series string, not a multi-channel array driver.
Supplied in an 8-pin SOIC package (0.154" body width, 3.90 mm) for surface-mount assembly, with the supplier device package also designated as 8-SOIC.