基于UC3863控制的LLC谐振变换器的设计及仿真

摘要

Design of a kind of a Switching Power Supply which takes half-bridge LLC circuit with PFC circuit that based on UC3863 control, and it has the function of current self-limiL And in detail analyze principles of LLC resonant converter and current self-limit. This paper focuses on Power Supply of 1KW with 220 V AC input for research, the simulation results about PFC and main circuit verify the correctness of the proposed design.%设计了一种以UC3863芯片为核心控制芯片的开关电源，其电路采用半桥结构的LLC谐振电路，带有PFC电路，且整个电路设计有自限流功能。分析了LLC谐振变换器整个电路的工作原理及自限流功能的实现。结合交流220V输入1KW输出电路，分别对PFC电路和主电路进行仿真，仿真结果验证了该设计的可行性。