This reference design is a compact: high efficiency: 24-V DC: 500-W reference design for industrial AC/DC power supplies. This design consists of a front-end: two-phase interleaved transition mode (TM) power factor correction (PFC) based on the UCC28064A. This minimizes the PFC inductor size and reduces EMI filter requirements. The DC-DC is implemented using the HB-LLC stage implemented using TI's UCC256301 device. For efficiency improvement: synchronous rectification is used at secondary which uses the UCC24612.