/diy/ - Do It Yourself

>>2762463
This is the simplest overcurrent latch of that topology I could design. You should be able to reset the latch by putting a switch in series with D2. It requires a ground-sensing comparator, and the low-level output voltage of the comparator needs to be low enough to turn M2 off.

Personally I prefer not having an oscillation, more tactful would be to detect when the load impedance increases. But it should be possible to add an oscillation by putting Rs and Cs somewhere tactful.