VF-Sepic-PFC电路的设计

介绍了ＶＦ－Ｓｅｐｉｃ－ＰＦＣ电路的工作原理，提出了其主电路和控制电路的设计方法，样机设计和实验证明该方法的正确性。与通用的Ｂｏｏｓｔ－ＰＦＣ电路相比，ＶＦ－Ｓｅｐｉｃ－ＰＦＣ电路无需专用ＩＣ，控制电路设计和调试简单；输出电压可以高于也可以低于输入电压峰值，易于实现输入输出隔离。

A Design of VF-Sepic-PFC Circuits

This paper introduced the working principle of VF Sepic PFC circuits first, and then proposed the design methods of its main circuit and control circuit. It is proved by a prototype design and experimental results that the methods are effective. Compared with generally used Boost PFC circuits, VF Sepic PFC circuits have the following advantages: (1) Because there is no need of special purpose IC, the design and debugging of the control circuits are quite simple; (2) The voltage output can be higher or lower than the voltage peak input; (3) Input output isolation can be easily implemented.