基于TV硬件的LED并联均流控制方法

LED Parallel Current Sharing Control Method Based on TV Hardware

介绍了一种基于TV硬件的LED并联均流控制方法,详细讲述了均流方案的系统模型对应的具体功能和均流方案控制流程;最后通过仿真数据说明了均流方法采用条件PWM信号的占空比实现,取代了原有的通过控制开关管的导通和关断组成的总时间来使LED灯组上的平均电流等于预定的电流值,使得系统的调节精度更高。

This paper introduces a parallel current sharing control method of LED based on TV hardware.The specific functions corresponding to the system model of the current sharing scheme and the control flow of the current sharing scheme are described in detail.Finally,the simulation data show that the current equalization method adopts duty cycle of conditional PWM signal,instead of controlling the total time of switching on and off to make the average current on the LED lamp group equal to the predetermined current value,which makes the system adjust the precision higher.