On Mon, 10 Oct 2005 08:38:21 +0000, Robert Baer wrote:
> Martin Riddle wrote:
>> I found this some where, I forget where, but its a novel approach.
>> A MAX232, +/-10 volt swing.
> I would never even *think* of Maxim or Dallas VaporWare.
Those MAX232 chips have been around for a while, so they probably aren't
too dangerous to depend on (although I've had my run-ins with Maxim and
Dallas). However, getting them to drive an IGBT at 40kHz may not be
possible, due to the large input capacitance, which may require lots of
current to overcome quickly. They use a charge pump, which may not be able
to supply the needed current.
There are dedicated IGBT driver chips available. There are also integrated
H-Bridge chips that would work nicely. Using one of those is probably the
simplest and safest course.