基于UC3842的反激式多输出开关稳压电源的设计  

Design of Flyback Multi-output Switching Power Supply Based on UC3842

作　　者：楚永宾[1] 黄海宏[1] 赵斌[1] 

机构地区：[1]合肥工业大学,安徽合肥230009

出　　处：《电源技术应用》2011年第8期47-51,共5页Power Supply Technologles and Applications

基　　金：合肥工业大学国家大学生创新性实验计划项目(091035923)

摘　　要：本文阐述了一种以电流型PWM控制器UC3842芯片为核心的高频反激式开关稳压电源。介绍电流型脉宽调制器UC3842的原理及特性,并详细给出了启动电路以及电压电流反馈电路的设计过程。同时分析了运行过程中尖峰电压的问题。实验测试结果表明:所设计的电源具有稳压性能优良,电压调整率,负载调整率高等特点。A high frequency flyback switching power supply with current-mode PWM controller UC3842 chip is proposed in this paper. The basic principle and characteristics of the chip UC3842 are introduced, and the start circuit and the voltage and current feedback circuit are introduced in detail. At the same time, the problem of peak voltage during the operation process is analyzed. Experimental results show that this power supply has good voltage regulation performance, with high regulation rate of voltage and load.

关 键 词：UC3842 反激式开关电源 电流型PWM 尖峰电压 

分 类 号：TM46[电气工程—电器]