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<BODY bgColor=#ffffff>>A modern switched mode PSU ought to be more than 90%
efficient,
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<DIV><FONT face=Arial size=2>In theory, yes, in practice, not likely. It
is harder to get high efficiency from an isolated supply than a non-isolated
one. I get ads from IC manufacturers all the time about there 90 to 95%
efficient solutions, but these are boost or buck regulators--non-isolated.
State of the art in commercial practice for isolated supplies is around 80 to
85%, and typical commercial practice is more like 70 to 80%. Now you
have more like 60 watts of heat radiating from this power supply. Go
stick a 60 watt light bulb (incandescent) in a small metal box and see how easy
it is to keep cool.</FONT></DIV>
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<DIV><FONT face=Arial size=2>Wilton</FONT></DIV>
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