I am working on a high current MOSFET switch project. I would like to implement short circuit/overcurrent protection, that would be fast enough to prevent MOSFETs from blowing up. In the actual application, I am using HAL sensor to measure current, but it wouldn't allow me to take any action quickly, because of its delay. How should I realize this protection? Should I do it by using shunt and high-quality op-amp, there is any better solution?
Use Vds detection with minimal dead time; drivers with short circuit protection use that methods.
EG for high voltage
If you have inductive loads or long cabling, detecting the current with a shunt is too slow and when you trigger the shutdown the current could take to much time to reverse. Specially with 5 Mosfet in parallel you can have problem to handle the energy in the circuit.