如下图所示的芯片有吗?两路电源输入,当一路失效时,芯片自动切换到另外一路供电。
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楼主
你可以看一下TPS2115A,http://www.ti.com.cn/cn/lit/ds/symlink/tps2115a.pdf
楼主,
1. 要想设置电流为2A,电阻配置为250ohm。
2. D0和D1内部有弱电流源上拉,可以悬空,为了保险起见,避免干扰等因素,你可以用一个电阻直接上拉到VIN,或者接到你MCU的输出。