Initially I chose a Infinion PROFET smart high side switch (ITS428L2). In the datasheet it is stated that this device can provide reverse battery protection with external resistor. Frankly, I am not able to figure out how this protection should work: The body diode of the internal MOSFET is placed in a way, that current can flow in case of reverse voltage. So where is the protection?
Therefore i tried to figure out a circuit that provide real reverse voltage protection and on/off-switching capabilities for currents in the ~10A region and as well for high currents (~100A). Is this a suitable approach?
Edit: Changed Source and Drain of PMOS2
Looking at the datasheets of serveral p-channel MOSFETs i wondered about the max. Drain-Current value. Sometimes this current is specified negative, sometimes positive - sometimes there are both values given but of different value. I thought if the MOSFET is conducting there is no direction for the current flow?
Example of SUM110P04-05: