In this thesis, the architecture combined with PFC and LLC half-bridge is applied to control the power circuit. To reduce the power consumption of the switching device, we adopt synchronous rectification and LLC half-bridge to control the power switch. The power switch has the property with zero-voltage and zero-current switching functions. Firstly, the characteristics and design method are discussed, and then we develop a switch controller of high-efficiency power supply, which can provide 150W between 90 and 264 VAC. The developed controller conforms the verification of energy bill requirements in European and American. The experimental results show that our system obtains the test efficiency between 92% and 94%.