This reference design is a GaN-based 45-W
active clamp flyback (ACF) providing auxiliary power in server and telecom power supply
units (PSU). The UCC28782 ACF controller and LMG2610 GaN half-bridge drive a planar
transformer with synchronous rectification using the UCC24612. This supply operates
using the PFC bus voltage as an input, and generates an isolated 12-V, 3.7-A output, and
a non-isolated 18-V, 400-mA output. The main 12-V output is protected by the TPS74800
ORing controller. Multiple PMP23146 units can be operated in parallel for higher power
capability.