On Apr 29, 2007, at 6:57 AM, Sean Breheny wrote: > initially, when the source of the high side fet is at 0V, > applying Vsupply+12 to the gate would cause Vsupply+12 > of gate-source voltage on the high-side fets. Does that mean that N-channel mosfets are next to useless for supplies where Vsup + Vgsthresh > Vgsmax ? Or does it mean that the high-side N-channel mosfet controllers are a lot more complicated than I thought ? BillW -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist