LLC谐振半桥DC-DC电路设计  

LLC resonant half-bridge circuit design with DC-DC

作　　者：杨磊[1] 吴晓光[1] 羊彦[1] 

机构地区：[1]西北工业大学,陕西西安710129

出　　处：《电子设计工程》2013年第8期138-140,共3页Electronic Design Engineering

摘　　要：LED驱动电源的后级DC-DC恒流电路采用LLC谐振半桥的拓扑结构,并通过输出的电流电压双环反馈来实现恒流限压功能。LLC谐振半桥DC-DC恒流电路的功率部分包括了谐振电路和输出整流电路,控制部分有芯片供电电路、控制芯片外围电路、输出反馈回路等,经试验证明该系统输出稳定好,能够长时间高效工作。Abstract： LED drive power level after the DC-DC constant current circuit using LLC resonant half-bridge topology structure, and through the output current and voltage feedback loop to achieve constant current limiting function.LLC resonant half-bridge DC-DC constant current circuit power part comprises a resonant circuit and the output of the rectifier circuit, the control part chip power supply circuit, the control chip peripheral circuit, an output feedback loop, the test shows that the system has stable output can be good, long time working with high efficiency.

关 键 词：恒流电路 谐振半桥 双环反馈 输出反馈回路 

分 类 号：TM923[电气工程—电力电子与电力传动]