On Sep 21, 2009, at 3:27 PM, Marcel Duchamp wrote: > It has all the basic equations for buck, boost, flyback and > transformer > designs. Any basic tips for how to optimize a supply for high efficiency at low power, rather than high power? You'd think there would be info coming out of the "less than 1W standby power" edicts for consumer devices (though that doesn't necessarily mean high efficiency during standby, I guess.) BillW -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist