一种新型节能LED驱动电路设计  

Design of a novel energy-efficient driver circuit for LEDs

作　　者：詹洪陈[1] 袁杰[2] 

机构地区：[1]南京大学金陵学院,江苏南京210089 [2]南京大学电子科学与工程学院,江苏南京210093

出　　处：《现代电子技术》2012年第18期1-4,10,共5页Modern Electronics Technique

基　　金：江苏省自然科学基金(BK2010386)

摘　　要：提出一种新型串联方式的LED驱动方法,通过将多节LED模块串联,利用高直流电压来降低传统并联方式所需提供的较大电流。利用稳压技术及等电流替换思想,提高各模块两端工作电压的稳定性,并通过光电耦合器确保相邻模块间的数据通信互不干扰。通过实验验证了所提出稳压方法的有效性,并给出了一组8模块串联工作时各模块两端电压的稳定性测试结果。理论估算结果表明,该方法相比传统并联方式具有更高的节能效果。该方案已申请国家发明专利。A LED driver method with a new series mode is introduced in this paper. High I）（2 voltage is used to reduce high cur- rent needed in traditional parallel mode by means of installing several LED modules in series. The voltage regulation technology and the proposed equivalent current replacement circuit （ECRC） are adopted to improve the stability of voltage at both sides of each module. The photocoupler is inserted to ensures data communication between adjacent modules not to be disturbed. Experiment re- suits verify the effectiveness of the proposed regulation technology. The result of the stability testing at both sides of each module in series mode of eight modules is given. The theoretical estimated result proves that the new approach saves more energy than the tradi- tional ones in parallel. The proposed method has applied for the national invention patent.

关 键 词：LED驱动方式 模块串联 光耦隔离 等电流替换 

分 类 号：TN919-34[电子电信—通信与信息系统] TP274[电子电信—信息与通信工程]