WROVER Devkit 供电LED问题

dexterzeng
Posts: 12
Joined: Thu May 05, 2022 1:37 pm

WROVER Devkit 供电LED问题

Postby dexterzeng » Sat May 07, 2022 7:42 am

我在使用3.3V 电源给WROVER Devkit 3.3引脚单独供电的时候发现开发板的LED会亮, 从原理图上看这个LED是在 LDO AMS117前面,5V输入亮才对,3.3应该绕过LDO了,为什么还会点亮?

ESP_LJH
Posts: 384
Joined: Tue May 18, 2021 9:21 am

Re: WROVER Devkit 供电LED问题

Postby ESP_LJH » Wed May 25, 2022 8:26 am

因为 LDO 会倒灌回去。

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