重庆大学学报2013，Vol.36Issue(3)：65-70,76,7.
有源纹波补偿Buck型LED驱动电路及其小信号分析
Small-signal analysis of the Buck circuit with active ripple compensation for LED
摘要
Abstract
Considering that the lifespan of electrolytic capacitor in power supply doesn't match the LED's, the authors propose a Buck converter which employs active ripple compensation circuit to drive LED. The circuit structure and working principle of the new topology is introduced and an equivalent small-signal model is established. The formula of output current and the transfer functions of output current with input voltage and duty cycle are obtained through the small-signal model. According to the magnitude and phase Bode plot of the transfer functions' first-order factor, the input disturbance can be completely filtered, and the output current is a DC theoretically, provided the appropriate parameters are selected. Finally, the correctness of the new topology and its small-signal model are confirmed by carrying out the simulations and experiments.关键词
LED驱动电源/电解电容/有源纹波补偿/小信号分析/传递函数Key words
LED power supply/ electrolytic capacitor/ active ripple compensation/ small-signal analysis/ transfer function分类
信息技术与安全科学引用本文复制引用
唐治德,谢小慧,王官涛,张晓斌..有源纹波补偿Buck型LED驱动电路及其小信号分析[J].重庆大学学报,2013,36(3):65-70,76,7.基金项目
国家自然科学基金资助项目(50877082) （50877082）
输配电装备及系统安全与新技术国家重点实验室自主研究项目(2007DA10512709303) （2007DA10512709303）
