This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TPS92641: 模拟调光异常现象

Part Number: TPS92641

Hi, TI team:

        我参考了TI的参考电路,采用了模拟调光,但是在输入电压从12V升到15V后,LED灯直接点亮,用单片机输出PWM波调IADJ的电压对LED电流没有变化,请问这是什么原因造成?

原理图如下:

        UDIM和SDIM没有输入,只有IADJ输入PWM波调电压。