摘要
介绍了一种基于TOP225Y的离线式PWM集成的反激式开关电源,阐述了TOP225Y的内部结构及工作原理,设计了双路输出为20V/1A,15V/1A的开关电源,给出了系统的硬件结构图,同时对外电路进行了设计和分析。按照要求,进行了电路参数的实际计算,给系统选择了合适的高频变压器,输出整流滤波电路及反馈电路等,最终给出了测试结果和分析。
A fly-back switching power supply based on TOP225Y is presented, analyzes its functional block diagram and principle .The system has the two output circuit 20V/1A and 15V/1A was design and discussed. According to the design requirements, deign outside circuit, given the system hardware calculation of the values of the parameters and selection high frequency transformer, input rectifier-filter circuit, output rectifier-filter circuit and feedback circuit, at last analysis output voltage wave.
出处
《电源技术应用》
2008年第7期15-19,共5页
Power Supply Technologles and Applications
关键词
开关电源
PWM
反激式
高频变压器
switch power
PWM
fly-back
high frequency transformer
