"Hi,
We’re working on Raspberry pi 3 B +, and we’re discharging the voltage using super capacitor for graceful shutdown.
I have a question regarding under voltage lockout detection. In one of the documentation forum it’s mentioned that Raspberry PI detects under voltage lockout if input voltage goes less than 4.63+/- 5% during the power on. We also observed the same,
We will be powering PI with POE and during ON state it is powered up with 5V and no problem in that.
But my question is that as we are discharging it through super capacitor for graceful shutdown, we want to know what will be the exact operation of PI during shutdown?
Will PI still detect under voltage lockout during shutdown? if yes,
As the super capacitor discharge voltage will decay with time, can it go below 4.63V during shutdown?
Rasp_Pi PMIC can generate output voltage i.e. 3.3V till super capacitor voltage of 3.6V. But will there be any problem of SDcard crash if PI goes to under voltage lockout during shutdown operation?
Can PI have graceful shutdown during Under voltage lockout?
Thanks,
Raj"