基于UC3842的小型开关电源设计与仿真  

Design and Simulation of Small Switching Power Supply Based on UC3842

作　　者：龙志国 LONG Zhiguo(China Telecom Corporation Limited Wuhan Branch,Wuhan 430071,China)

机构地区：[1]中国电信股份有限公司武汉分公司,湖北武汉430071

出　　处：《通信电源技术》2021年第24期33-36,53,共5页Telecom Power Technology

摘　　要：小型开关稳压电源的设计选用单端反激式拓扑结构,与正激式拓扑结构在原理上进行对比,功率开关管由电流控制型脉冲宽度调制芯片UC3842进行控制。论述了开关电源电路的各单元电路原理,并进行参数设计,最后对设计电路进行了仿真验证。The design of small switching regulated power supply adopts single ended flyback topology,and the power switch transistor is controlled by current controlled pulse width modulation chip UC3842.In principle,it is compared with the forward topology.The principle of each unit circuit of switching power supply circuit is described and the parameters are designed.Finally,the design circuit is simulated and verified.

关 键 词：开关电源 UC3842 单端反激式 高频变压器 

分 类 号：TN8[电子电信—信息与通信工程]