基于TOPSwitch-Ⅱ的反激式恒流LED驱动电源  

Constant Current Fly-Back LED Driver Based on TOPSwitch-Ⅱ

作　　者：杨家志[1] 易胜利[1] 蒋存波[1] 杨斐[1] 钟亚洲 杨帆[2] 

机构地区：[1]桂林理工大学信息科学与工程学院,广西桂林541004 [2]河南电力公司信阳供电公司,河南信阳464100

出　　处：《电子器件》2014年第5期944-948,共5页Chinese Journal of Electron Devices

基　　金：国家自然科学基金项目(51167004);广西自然科学基金项目(2013GXNSFBA019250);广西空间信息与测绘重点实验室课题项目(桂科能1207115-02)

摘　　要：发挥LED的高效率、长寿命等诸多优点需要可靠、高效率的LED驱动电源,而恒流LED驱动电源是未来发展的趋势。基于TOP222设计了一款反激式恒流LED驱动电源,重点设计了恒流驱动电源的变压器和恒流反馈回路。实验结果表明:该电源输出额定电流为1 A,额定功率为10 W,低负载情况下以恒压方式输出。具有较好的稳定性,恒流特性和较高的效率,能够作为稳定、高效的LED驱动电源。A reliable, efficient LED driver plays an important role in unleashing many advantages of LED, such as high efficiency, long life-time. A constant current fly-back LED driver based on TOP222 is designed, and the transformer of the constant current power supply and the constant current feedback circuit are deeply researched. The experiment shows that,the output current of the LED driver is 1 A,the output power is 10 W,the power supply works in constant voltage mode within the low load situation. The driver featured with good stability, constant-current characteristic, and high efficiency, is capable for driving LED.

关 键 词：LED驱动电源 恒流 反激式 TOP222 

分 类 号：TN86[电子电信—信息与通信工程]