电测与仪表Issue(8)：112-115,4.
LED灯峰值恒流控制的方法*
Way of Peak Constant Current Control for LED
摘要
Abstract
When introducing the working characteristics of LED lamp, this paper analyzes the Buck circuit peak current control in order to improve the reliability of the LED driver. In the condition of the figure peak current CCM the paper also introduces the trailing edge modulation principle in detail, and deduces Buck circuit duty cycle mathematical formula in this work condition of inductor current.The simulation analyzes the trailing edge modulation waveform of the PWM switch and LED lamp current waveform, which shows that the modulation of the LED light output constant current waveform and ripple. In the end, it verifies the feasibility and reliability of the constant current control LED lights by experiments.关键词
LED灯/Buck/峰值电流控制/CCM/DPC后缘调制Key words
LED lamp/Buck/peak current control/CCM/DPC trailing edge modulation分类
信息技术与安全科学引用本文复制引用
周登荣,李国云,蒲红梅..LED灯峰值恒流控制的方法*[J].电测与仪表,2013,(8):112-115,4.基金项目
四川省教育厅资助科研项目 （）
