Electric Potato
Well-known member
Hey guys,
I'm wondering, is there a major practical difference between these two methods of switching from battery to usb power:
P-ch MOSFET with Shottky diode:
Just Schottky diode:
I know circuit 2 drops the battery's voltage, but for my project that's not an issue. My only goal is that no power can flow out of the battery
when usb power is attached, which (I think) should be the case in circuit 2, since Vbat will always be at a lower voltage than Vusb.
Am I correct on that? Are there any possible issues with just using a single diode to switch between battery and usb power?
Thanks!
I'm wondering, is there a major practical difference between these two methods of switching from battery to usb power:
P-ch MOSFET with Shottky diode:
Just Schottky diode:
I know circuit 2 drops the battery's voltage, but for my project that's not an issue. My only goal is that no power can flow out of the battery
when usb power is attached, which (I think) should be the case in circuit 2, since Vbat will always be at a lower voltage than Vusb.
Am I correct on that? Are there any possible issues with just using a single diode to switch between battery and usb power?
Thanks!