TIDT192 October 2020
This reference design provides up to 265-W constant voltage and constant current output from an 120-VAC input with a single-stage LCC resonant converter stage. The BOM cost of this design is highly optimized with the single-stage structure and the use of UCC256403 driver integrated LLC Resonant Controller. A UCC28910 primary-side regulated Flyback is applied as a bias coverter and allows the main power stage to be turned on and off. This design is able to achieve 88% peak efficiency with over 200-kHz switching frequency at 120 VAC.