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