Search the archives for instances of "Low voltage the incompetent ignition =
source" with regard to some fun I had years ago with a failed H-Bridge that=
 couldn't get rid of heat fast enough.
The 1W average input power from the switcher (in hiccup mode) was enough to=
 take the board from failed to flaming and to keep it there.

Redesign of the H bridge solved the issue, and relayout of the PCB with lot=
s of copper pour assured that even if the new design failed, the heat dissi=
pation was good enough to keep the temperatures down.

--=20
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