>> > they also don't turn off just by bringing VGE to zero
>>=20
>> I can vouch for the ISL9V5036 IGBT turning on and off
>> very smartly driven by a PIC pin through a 1k gate resistor
>=20
> I should have said "they also don't turn off quickly just by....

Most attention in the app notes is given to the switching bit of
the device rather than the gate drive (which is relatively trivial
for both FET or IGBT), and no doubt the big IGBT are sluggish
at high throughput as the gate C is quite a bit larger than for a
power FET. As IRF's pdf points out, there's a substantial overlap
area between FET and IGBT in which the designer has to weigh
up the options and consequences

Joe


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