基于UC3842的单端反激式开关电源的设计与分析  

Design and Analysis of a Single Flyback Switching Power Supply Based on UC3842

作　　者：夏泽中[1] 王彬[1] 李军[1] 

机构地区：[1]武汉理工大学,湖北武汉430070

出　　处：《电源技术应用》2008年第6期6-10,共5页Power Supply Technologles and Applications

摘　　要：介绍了一种以UC3842芯片为核心的反激式开关电源,比较了正激和反激的不同,分析了电路的工作原理和UC3842在反激电路中用于输出直接反馈的用法,提出了一种并联整流二极管用于减小尖峰电压的方法,并通过实验结果得到验证。A novel single flybaek switching power supply is presented, which is based on the intelligent integrated chip named UC3842, and the difference between the forward converter and the flyback converter is compared, the working principle of the circuit and the usage of direct feedback from output based on UC3842 are analyzed. Compared with the traditional way, it gives a new method of paralleled rectifier diode which can reduce the voltage overshoot effectively. The experiment result verify the virtue of the method.

关 键 词：脉宽调制/反激 尖峰电压 开关电源 

分 类 号：TN86[电子电信—信息与通信工程]