On Sat, 2 Dec 1995 mlk@ASU.EDU wrote:

>
>         Does anyone know of a single-chip solution to interface the PIC
> output (5V) to the MOSFET gate (around 12V) with plenty of source and
> sink capability.  I hear the MOSFET gate capacitance can be as high as
> 1600pf (I do not have a data sheet on the IRF520) so current drive should be:
>
>         I = C*(deltaV/deltaT) = 1600pf * (12V/100nsec) = 192 mA
>
>         A bipolar transistor voltage translation could work.  I need 8 of
> these for 8 channels of MOSFET drive.  So single-chip solution means all
> 8 channels.
>
Electronics Now magazine has a column called Hardware Hacker by Don
Lancaster.  A while back, maybe a year ago, he had some info on "high
side drivers".  He is very good with cross references and
bibliographies.  He is on the Genie service in the PSRT (postscript round
table) also.  Good luck to you, I spent a lot of time pulling my hair out
over a similar, though higher current circuit.

morris beverly   avpres@world.std.com