基于双输出反激变换器的LED驱动电源设计  

HB-LED Driver based on Dual-Output Flyback Converter

作　　者：柏淑红[1] 

机构地区：[1]成都电子机械高等专科学校电气与电子工程系,四川成都610027

出　　处：《电源技术应用》2012年第4期22-26,41,共6页Power Supply Technologles and Applications

摘　　要：针对LED灯输出电流恒定的工作特性,提出了DC/DC变换器电感电流工作在不断续模式(DCM)下的双输出反激变换器驱动LED的控制方法。主要分析了两路LED灯负载的工作过程,用一个磁性元件实现LED灯两路控制器恒流输出。通过小信号模型分析了系统的稳态、动态和高频干扰抑制能力,最后通过实验验证了所提出的拓扑电路结构和控制方法的可行性。According to the LED light output current constant working characteristic,the DC/DC converter inductor current in discontinuous-conduction mode （DCM） of the dual-output flyback converter LED driver control is proposed. By a magnetic part to realize LED lamp two controllers constant current output, the two LED lamp load working process are discussed. The small signal model was analyzed, and the simulation shows that the system steady, dynamic and high frequency interference suppression ability can achieve very good results, the experiments validate feasibility of the circuit topology structure and the control method.

关 键 词：LED驱动 双输出恒流源 反激变换器 时分复用 

分 类 号：TM910.2[电气工程—电力电子与电力传动]