Peter L. Peres wrote: >Of course you know that you can use a bipolar as buck 'diode' too. Try it. >You need another PNP with E at GND and negative base drive during flyback. I think this will definitely reach over spec of reverse voltages over that transistor during the forward phase. Unless input voltage is 5V or less. /Morgan -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.