5 ms·
Assuming reasonable charger design (ie. at least some overcurrent protection) the internal ESD protection of USB-C port in the device that only ever expects 5V
by dfox 7y ago
Assuming reasonable charger design (ie. at least some overcurrent protection) the internal ESD protection of USB-C port in the device that only ever expects 5V (think SRV05-4) should be more than enough to safely trip the overcurrent protection in the charger (or overload it enough that the destroyed component is the charger and not the device).
On the other hand there are documented cases of USB-C PD between two device-ish things (ie. things that can be both power source and sink) failing in variously spectacular ways.
- extrapickles 7y agoThe problem is that the ESD protection can only stop short duration spikes. The device would have to have a fuse (or other overcurrent protection) to prevent the 20V @ 5A as allowed in the USB spec from destroying the ESD circuit.
- Dylan16807 7y agoA USB port should always have a polyfuse. And active disconnect isn't hard either.