Hello,

I am having some trouble designing a power control circuit and hoping someone could help. My application will have a battery connected to the circuit at all times, however, I need a circuit to allow a power supply to power the circuit even when the battery is connected as to not waste battery power while testing. I was wondering if I could do this with a mosfet OR configuration, but I wasn't sure how to hook this up. Any ideas or help would be appreciated.
Thanks

 

The easiest is to use an ideal diode circuit.