pfet backward
pfet backward
(OP)
i want to use a BSS84 power pfet to be used as a reverse battery protection circuit. i want to connect the drain to the the positive side of the battery and the gate to the negative side of the battery. usually pfets have to have the source connected to the higher potential.
i have seen this setup before and i wanted to know if pfets can be used backward and what implications it would cause.
thanks.
i have seen this setup before and i wanted to know if pfets can be used backward and what implications it would cause.
thanks.





RE: pfet backward
RE: pfet backward
so your saying a pfet is symmetrical no mater what direction you put it, it will work?
RE: pfet backward
I tried the same idea using a PNP (no sustrate diode and ~100mV drop), but the PNP BJT doesn't like it much when current flows from Emitter->Collector.
Hope this helps!