Homebrew PCBs

--- 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.