Offline LED driver with integrated switch and Triac dimming
The Texas Instruments UCC28810DR is an AC DC Offline Switcher designed for lighting applications, integrating a 750 mA output switch in an 8-SOIC package. It supports multiple topologies — Flyback, SEPIC, Buck, and Boost — giving the board designer flexibility to match the LED string voltage and isolation requirements without changing the controller IC. The Triac dimming interface means this part is built for retrofit LED lamps and luminaires that must work with standard wall dimmers, not just 0-10 V or PWM control.
750 mA output and 18 V supply rail — what they mean for the BOM
Rated 750 mA per channel, the internal switch handles single-string LED loads up to that current without an external MOSFET — the limiting factor is the SOIC-8 package's thermal impedance, not the silicon. Maximum supply voltage is 18 V, so the IC runs directly off a rectified auxiliary winding or a low-voltage DC rail; the input capacitor and snubber must be rated for the peak voltage of the offline stage, not the IC's own limit. Operating temperature range -40°C to 105°C covers enclosed luminaires and outdoor-rated fixtures where ambient heat plus self-heating stays below the junction limit.
Active lifecycle and compliance documentation
The 8-SOIC package is a standard JEDEC footprint with 1.27 mm pitch, making PCB layout straightforward and second-source compatible without a board spin.