Friday, 17 January 2020

usb - Switch between 5V power supplies?


I'm designing a board that can be powered either by USB or an ATX power supply. They can both be plugged in at the same time, independently. I'd like the ATX to provide 5V if its plugged in, but fall back to the USB if possible. The chips in the circuit will all be running at 5V.


Any ideas?




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