Boost/SEPIC LED driver with integrated 2.8 A switch
The LM3410XMF/NOPB is a current-mode DC-DC regulator from Texas Instruments designed to drive LEDs, combining a boost or SEPIC topology with an integrated 2.8 A switch. Switching at 1.6 MHz, the part keeps the inductor and capacitor small enough for compact portable backlight assemblies — the frequency sits above the audible range and below the point where switching losses dominate the thermal budget in a SOT-23-5 package. Output voltage adjusts from 3 V to 24 V, covering single-LED strings up to series arrays in small-panel backlights.
PWM dimming and backlight application fit
Dimming is handled via a PWM input on the enable pin — the internal regulator turns the output on and off at the PWM duty cycle, so the LED current is averaged down without shifting the colour point. The part is explicitly listed for backlight applications, where the combination of PWM dimming and the 2.8 A switch current supports moderate-sized LCD panels and keypad backlights.
Package, supply rails, and compliance
Housed in a 5-pin SOT-23 (SC-74A) package, the LM3410XMF/NOPB mounts on a standard surface-mount footprint with the exposed pad on pin 5 carrying the switch current.