Hello!
So... lets say i take INA226 current shunt monitor, it has a (latching) open drain alert pin.
This pin goes low between 1ms and 5ms after a fault has been detected, page 29 in the datasheet, can be longer depending on the configuration.
Then i take a relay and fet with a pullup resistor at the gate and turn a relay on with it.
Now i connect to open drain alert to the gate and have it disable the relay in case of a fault, the next best datasheet if found quotes a release time of 5ms.
Lets say, for good measure, after 20ms the output disconnects after the powersupply is shorted to ground or too much current is drawn.
I know it depends on the power supply, for the sake of the argument assume the power supply in question is a standard "cheap" ATX powersupply with a 20A output on the 12V or 5V line.
Before someone asks, yes, i have everything at hand could just wire it up and test it to see what happens but i wanted to ask here before i proceed.
Alternatively i could use a beefy FET instead of the relay, that would cut the response time a bit shorter.
Greetings,
Peter