LED dimming control system

The utility model provides a dimming control system for an LED, and the system carries out the filtering and copying of a PWM signal, forms a first analog signal and a second analog signal, and outputs the first analog signal and the second analog signal to a control unit, thereby enabling the control unit to control the current peak value of a load current in a load unit based on the first analog signal. And the switching period of the load current is controlled based on the second analog signal, so that an LED dimming scheme based on the analog signal is realized, high-frequency flicker caused by PWM dimming is eliminated while the circuit is prevented from generating noise, the dimming effect of the LED is further improved, and good use experience is provided for a user. 本公开提供了一种LED的调光控制系统，通过对PWM信号进行滤波和复制形成第一模拟信号和第二模拟信号后输出至控制单元，使控制单元基于第一模拟信号对负载单元中负载电流的电流峰值进行控制，基于第二模拟信号对负载电流的开关周期进行控制，实现了基于模拟信号的LED调光方案，在避免电路产生噪音的同时，消除PWM调光带来的高频闪烁，进而提升了LED的调光效果，为用户提供良好的使用体验。