基于临界电流模式的APFC电路分析与设计

Analysis and Design of APFC Circuit Operated in Critical Current Mode

本文讨论了功率因数校正的方法 ,分析了电感电流工作于临界模式的升压式有源功率因数校正电路的原理。采用控制芯片UC385 2制作了一台输出功率为 10 0W的原理样机 ,实验结果表明该原理样机能将功率因数提高到 0 99以上 ,总谐波畸变小于 6 %。

In this paper,the methods of power factor correction are discussed,and the principal of boost active power factor correction circuit operated in critical inductor current mode is analyzed in detail.A 100W laboratory prototype based on control chip UC3852 is built.The experimental results verify that the prototype can make the power factor reach over 0.99,and make total harmonic distortion reach lower than 6%.