Using EG1654 as the PFC controller and EG6599S as the LLC controller. After full-bridge rectification of the input voltage, it is boosted to 390V by EG1654, and then converted into a 36V DC output voltage through a half-bridge LLC topology. Under full-load conditions, the overall system efficiency is 93% with 220V AC input and 90% with 110V AC input. In addition, this design also includes multiple built-in protection functions, including output overcurrent and short-circuit protection.