›› 2015, Vol. 28 ›› Issue (12): 143-.

• 论文 • 上一篇    下一篇

基于电池供电的双路隔离反激开关电源设计

王海鹏,刘璐   

  1. (1.东南大学 信息科学与工程学院,江苏 南京 210096;2.日照市第一中学,山东 日照 276800)
  • 出版日期:2015-12-15 发布日期:2015-12-15
  • 作者简介:王海鹏(1987—),男,博士研究生。研究方向:生物电子学等。E-mail:wanghaipeng4213@126.com
  • 基金资助:

    国家自然科学基金资助项目(90307013,90707005)

Design of a Low-cost Isolated Flyback Switching Power Supply Based on Li-battery

WANG Haipeng,LIU Lu   

  1. (1.School of Information Science and Engineering,Southeast University,Nanjing 210096,China;
    2.Rizhao No.1 Middle School,Rizhao 276800,China)
  • Online:2015-12-15 Published:2015-12-15

摘要:

针对便携式医疗康复设备领域中电池供电、高隔离度和高电压输出的要求,设计了一款新型低输入电压供电、双路高压输出隔离的开关电源。该设计采用锂电池供电,采用基于占空比<50%的电流型脉宽调制控制芯片UC3845的反激拓扑结构和光耦反馈网络电路,实现双路隔离正负高压电源输出。电源输入电压为10~14 V,输出电压为双通道+35/-35 V隔离,功率为14 W,效率是75%,电源模块面积为65 mm×40 mm。仿真与实际测试结果表明,该电源可实现正负高压电源隔离输出。

关键词: 反激, 开关电源, 电流型脉宽调制, 反馈电路

Abstract:

A new low-cost isolated flyback switch Li-battery power supply is designed for battery-powered medical instruments with high voltage and isolated function.The chip with current type of pulse width modulation (PWM) UC3845 and a feedback circuit are used to realize the isolate and dual-output function.The input of the designed power is 10~14 V and the dual-output are +35 V and -35 V.The consumed power is 14 W with an efficiency of 75%.The size of the module is 65 mm×40 mm.The simulation and experiment results validate that the power supply module can realize the ±35 V power isolated supply.

Key words: flyback;switching power supply;current type pulse width modulation;feedback circuit

中图分类号: 

  • TN710.2