Can a PIC directly drive a PNP transistor as a "high-side" switch?
I has always assumed this was possible, but looking it WRT my high
voltage issue, it would seem to put the PIC output pin at high
voltages,
and probably turn on all the time via protection diodes, or something
(PNP Emitter to +150V, collector to load, base to R to PIC IO.  Doesn't
that put the PIC IO at 150V-Vbe when on?  Is that why "real" H-bridge
circuits always seem to have that extra transistor?  Seems like the
times I've actually implemented a high-side switch, the voltage I've
been switching is the same as the processor supply...

Thanks
Bill W

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