单端反激开关稳压电源设计与制作  

Design and Fabrication of Single-ended Flyback Switching Regulated Power Supply

作　　者：管尚书 赵雨桐 宋桂英[1] GUAN Shang-shu;ZHAO Yu-tong;SONG Gui-ying(School of Electrical Engineering,Hebei University of Technology,Tianjin 300401,China)

机构地区：[1]河北工业大学电气工程学院,天津300401

出　　处：《通信电源技术》2019年第4期133-134,136,共3页Telecom Power Technology

摘　　要：针对离线式结构开关电源的缺点,利用反激变换器的优点,基于UC3844设计了单端反激开关稳压电源。同时,配合可调式精密三端稳压器TL431和光耦FL817构成反馈回路,在单相交流输入220 V±15%的输入条件下,实现直流电压12 V和电流2.5 A的输出,且具有良好的稳压效果。In view of the shortcomings of off-line switching power supply,a single-ended flyback switching power supply is designed based on UC3844,taking advantage of the advantages of flyback converter.At the same time,with adjustable precision three-terminal regulator TL431 and optocoupler FL817,the feedback loop can realize the output of DC voltage 12 V and current 2.5 A under the input condition of single-phase AC input 220 V±15%,and has good voltage stabilization effect.

关 键 词：开关电源 反激 脉宽调制 反馈 UC3844 

分 类 号：TM46[电气工程—电器] TN86[电子电信—信息与通信工程]