--- In
Homebrew_PCBs@yahoogroups.com, "Roy J. Tellason"
<rtellason@b...> wrote:
...
> This is the second post I've seen so far that seems to suggest that
it's okay
> to rely on the internal diodes in mosfets. The general consensus in
other
> lists seems to be that this is _not_ a real good idea, for a number of
> reasons. One of those is that those internal diodes don't have very
> consistent characteristics, and another is that they turn on too
slow, and
> turn off too slow, which will tend to make the device run hot.
Since heat
> is an enemy of semiconductors, I'd tend to go with the external
diodes,
> myself.
agreed. even if they switched fast, there would be dissipation IN THE
MOSFET. Distributing the heat dissipation is a good thing.