Other Parts Discussed in Thread: LM5050-1
Hello all.
I want to build a high-current reverse input protection circuit that can withstand up to -65V continuous reverse input.
I know that what follows is just a crazy, not feasible idea, however I would like to share it with you: LM74610-Q1 can withstand reverse voltages up to -45V between anode and cathode pins. We could overcome that limit by inserting a suitable resistor in series with Anode pin and a 39V zener between Anode and cathode. Unfortunately, Anode pin is also used for sensing the mosfet drain-source voltage during reverse polarity operation so I expect that this resistor-zener addition will prevent normal operation.
Perhaps TI could offer another version of this IC with separate Vcc and voltage sense pins. Unitl then, I guess that what I am proposing above wouldn't work at all. 
Next option is to use LM5050-1, by connecting a diode in series with Vss pin, per LM5050-1 datasheet page 20. Datasheet says it works up to -48V but I see no reason no to operate up to +/-75V. Is it a recommended solution?
Regards
Dimitrios
