This reference design is a compact: high efficiency: fast transient: universal input: 12-V DC: 200-W nominal output: AC/DC power supply (PSU) targeted for desktop PCs and gaming adapters. The TIDA-01557 circuit consists of a front-end transition-mode (TrM) power factor correction (PFC) circuit based on the UCC28056: followed by an LLC stage for isolated DC/DC conversion based on UCC256301. For…