摘要
介绍了双环电流型脉宽调制 (PWM)控制器UC384 2的工作原理、特点以及使用中的功率因数校正和斜坡补偿方法。双环电流型PWM控制器是在普通电压反馈PWM控制环内部增加了电流反馈的控制环节 ,因而除了包含电压型PWM控制器的功能外 ,还能检测开关电流或电感电流 ,实现电压电流的双环控制。
Double-loop current type PWM controller can not only act as a voltage-type PWM contro- ller, but also test switching current and inducted current, for current feedback control is added, thus it realizes double loop control of both current and voltage. The power factor correction and slop compensation method used in double-loop current type PWM controller (UC3842) are introduced in this paper.
出处
《电子工程师》
2004年第11期54-55,80,共3页
Electronic Engineer
关键词
脉宽调制控制器
电源
双环电流控制
功率因数校正
斜坡补偿
PWM controller, power supply, double-loop current control, power factor correction, slope compensation
