Hi Rich, What is the application? When you say "at 100KHz" do you mean that as the PWM frequency or do you mean that the overall frequency (fundamental frequency) of the drive voltage is 100KHz. If you mean the latter, then this has got to be a very special transformer. I would suspect that the best way to do this would be with an H bridge made from four IGBTs or regular BJTs, although 100KHz is really pushing it there. You can find FETs that work at those voltages but they are not that common, especially with a reasonably low Rds_on. Sean On Fri, Aug 8, 2008 at 10:51 PM, Rich wrote: > I have to drive a transformer primary at 230 VAC @ 14 Amps @ 100KHz. I have not yet measured the primary impedance, but I will. I am wondering if anyone has already worked with Power FET complements at that high current and voltage, and which FETs may have been used. > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist