The Raspberry Pi HAT design guide states that it is important to build in protection should the user want to back-power the pi via GPIO. I believe I understand its function (to stop current flowing from the Pi to the HAT) but I would like to understand how. My questions:
- How does the back-power protection work?
- Is it also enough for back-powering a Jetson Nano, which could pull at most 6A at 5V?
The design I'll be using is this one: Its origin lies in the KiCad Template for Pi 40 pin HATS, probably derived from this schematic. The left side is the Jetson Nano GPIO side, right side (P5V_HAT) is the side that the power is supposed to come from.