Dual Boost PFC电路拓扑的研究

Study on Dual Boost PFC Topology

传统的Boost PFC电路的整流桥损耗是通信开关电源的主要损耗之一。无整流桥的拓扑更具有效率优势。由于无桥Boost PFC省略了整流桥模块,效率显著的提高。文中分析了一种高效率的Dual Boost PFC的大功率应用,通过实验证明了Dual Boost PFC电路效率比传统的Boost PFC提高1个百分点,还介绍了电阻采样控制电路的使用和如何降低EMI干扰。

Rectifier power loss of traditional boost PFC is the major loss in commtmieation LIPS power system. The big ad- vantage of bridgeless topology is power saving. Bridgeless boost PFC topology removed the rectifiers, so the power rate is obvious- ly increased. In this article, high-power applications of a high-efficiency dual boost PFC is analyzed. Through lab test, it was proved that the power rate of dual boost PFC topology was about 1 % higher than traditional boost PFC; topology. Meanwhile, it introduced the use of resistance sampling control circuit and how to reduce EMI interference