反激式开关电源的设计毕业设计说明.doc

毕业设计说明书 反激式开关电源的设计 专业 电气工程及其自动化 学生姓名 伊利优酸乳 班级 XXXXXX 学号 XXXXXX 指导教师 XXXXXX 完成日期 2XXXXXXXXX 反激式开关电源的设计 摘 要：TOPSwitch器件设计开关电源的设计过程。TOPSwitch器件是近代出现的芯片，它有很多功能，如对过流，过热进行保护，能自动重启等。对TOPSwitch-GX的工作原理进行了理解，对内部结构进行了分析，对以TOP244Y为控制核心的反激式开关电源进行了设计。设计出的采用此芯片的反激式开关电源的外围电路很简单，所用元器件少，性能指标高，价格低，有较高的集成度，很有实用价值。该芯片的开关频率为132kHZ设计电路的开关电源输出功率为25W时，12V/1.2A,5V/2A和30V/20mA三路直流电压输出匝关键词：开关电源；反激式变换器；TOPSwitch；高频变压器 Design of Single-end Flyback Switching Power Supply Abstract： here is an integral part of a variety of electronic devices, and that is power. Flyback switching power supply design elaborated flyback switching power supply works; contrast through the program, select a current-controlled PWM technology used; finally describes the use of TOPSwitch device design of switching power supply design process. TOPSwitch device is the modern appearance of the chip, it has many features, such as over current, over temperature protection, can automatically restart and so on. The working principle of TOPSwitch-GX are understood, the internal structure is analyzed, based on TOP244Y has been designed for the flyback switching power supply control center. The use of this chip design flyback switching power supply external circuit is very simple, the use of fewer components, high performance, low price, have a higher degree of integration, very practical value. The switching frequency of the chip 132kHZ. Design of circuit switching power supply output power of 25W, you can achieve 12V/1.2A, 5V/2A and 30V/20mA three-way DC voltage output. In addition, the design of the peripheral circuits, and this analyzed. High-frequency transformer design is the key, right core, coil turns is a selection. With this switching power supply can not only greatly reduce the peripheral circuit components, cost reduction, but also to greatly improve the reliability, normal working hours, you can provide multiple outputs in home appliances, IT and other fields are widely used. Key words: Switching power