基于UC3842的小功率开关电源工作原理及维修

Operating Principle and Maintenance of UC3842-based Low Power Switching Power Supply

分析了应用广泛的UC3842的小功率开关电源工作原理,根据维修开关电源的实践经验,介绍了开关电源的故障判断和维修。

This article analyzes the working principle of the widely used UC3842 low power switching power supply,and illustrates the fault judgment and maintenance of the switching power supply according to the practical experience of repairing the switching pow⁃er supply.