> Which is why it baffles me that they have an SMD version that can alleged=
ly
> handle 5A.  I do have a 2 sq-in pad on the board to dissipate heat, but i=
t's no
> where near enough.

This is where you start going to aluminium core PCB with umpteen vias in th=
e tab mounting pad and very thin laminate layers. Aluminium core at edge of=
 PCB solidly attached to big piece of aluminium radiator, and chip mounted =
as near the edge of the PCB as practical.

Been there, done similar things, not quite that level of dissipation, but h=
ad to take such things into account.
--=20
Scanned by iCritical.

--=20
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