Comment on USB PD for older device
SorryImLate@piefed.social 3 days agoSo, if I added this board to my device, I must be sure to only charge it with a power supply that supports PPS in the 12v range - is that correct?
Comment on USB PD for older device
SorryImLate@piefed.social 3 days agoSo, if I added this board to my device, I must be sure to only charge it with a power supply that supports PPS in the 12v range - is that correct?
cmnybo@discuss.tchncs.de 3 days ago
There are plenty of chargers that support a fixed 12V output without needing PPS. Just check the specs before buying one.
If you use a CH224K USB PD trigger chip, it has a power good pin. It will go low if the power supply is providing the requested voltage. You can use it with a MOSFET and driver circuit to switch the output on only when it gets the correct voltage.