Has anyone used a super cap backup circuit with a SOM to gracefully shutdown files, etc? Looking for suggestions so I don’t re-invent the wheel if someone has a good solution.
I used a 0.47F capacitor to backup a system build around a G120 module. Beside the backup power you need to implement a circuit to early detect a power down. Such a circuit could trigger an interrupt handler.
Check out the LTC3226 2-cell supercap charger and controller with power path.