一种LED驱动电源组合调光策略与实现

LED照明是未来电气照明领域的发展方向,LED因其陡峭的伏安特性的特点,需要恒流驱动。采用基于UC3842控制的反激型变换器作为驱动电路,实现恒流调光功能。文章重点分析了LED照明调光方式的实现,设计了一种高效的组合调光策略的调光电路。通过仿真和样机测试,得到实验结果并对其分析,该驱动电路效率达到86%以上,输出电流纹波在4%以下,电路稳定可靠,实现了高效调光特性。

A Combination of LED Power Drive Dimming Strategy and Implementation

LED lighting is the development direction of future electrical lighting field. By the characteristics of the diode characteristics , LED needs constant current driving. The design of the flyback converter is analyzed in this paper to realized constant current and dimmer function. This paper focused on the realization of LED dimming ways, designed a kind of high efficiency dimming circuit. Through simulation and prototype test, the paper concluded and analysed the experimental results . This circuit efficiency is above 86%, the ripple under 4%. The circuit is stable and reliable, also can realize various ways of dimming.