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.

LM3414LED恒流驱动IC关断微亮问题

Other Parts Discussed in Thread: LM3414

第一次使用TI的大功率LED共阳驱动IC LM3414,两个LED串接,并且LM3414的DIM脚接地,原则上灯会不亮,但实际上灯会有点微亮,像是关不断的样子。

驱动部份的原理图:

不过这样的情况我们的解决办法是在共阳端也就是+24V和LED的负端,贴一个上K级别的电阻,如图上的RL2贴一个47K电阻就没有微亮了。难道这是IC本身的缺陷?