> that it was one or the other (MOSFET or=20
> any schottky across D-S, but always one or the other).

Hi Neil,

as none of them are ideal parts there will be heat. In SMPSs I've
disassembled, particularly big expensive ones made by reputable
companies, TO220 Schottkys are often found on fairly substantial
heatsinks, so it's accepted and accounted for by the designers

Joe


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