单端反激式开关电源的设计  

Design of a single flyback switching power supply

作　　者：刘梦坷 唐海洋[1] 

机构地区：[1]西安工程大学电子信息学院,陕西西安710048

出　　处：《电子设计工程》2017年第1期175-178,共4页Electronic Design Engineering

摘　　要：本文采用高性能电流控制型脉宽调制芯片UC3844作为电源的核心控制部分,设计了一种交流输入为115 V、三路直流输出为+5 V/3 A、±12 V/0.5 A的单端反激式开关电源。通过具体的试验,分析了电路的工作原理以及UC3844在反激式电路中反馈的用法,应用脉宽调制和反馈得到了+5V、±12 V三路稳定的输出。实验结果表明,该电源具有良好的性能。In this paper, a high-performance current-controlled pulse width modulation control chip UC3844 as a core part of the power of design a AC input 115 V, three-channel DC output is ＋ 5 V / 3 A, single-ended ＋ 12 V / 0.5 A switch flyback power supply.through specific tests, analyzes the working principle of the circuit and the use of UC3844 in flyback circuit feedback, the application pulse width modulation and feedback obtained ＋ 5 V, ±12 V three-way stable output. Experimental results show that the power supply has a good performance.

关 键 词：开关电源 反激式 UC3844 变压器 

分 类 号：TN710.1[电子电信—电路与系统]