stube40 Posted August 26, 2010 Report Share Posted August 26, 2010 I have created an H-bridge PC with 4x floating gate drivers and 4x IGBTs (see attached schematic showing half of h-bridge). It works very nicely but I would like to replace the IGBTs with n-channel MOSFETs. However, all the H-bridge designs I've seen use n-channels on the low side and p-channels on the high side. Since my design uses independant galvanically isolated DC-DC converters which effectively provide each of the 4x gate drivers with their own floating supply, is it possible that I can just do a simple straight swap between of the IGBTs with N-channel mosfets? Quote Link to comment Share on other sites More sharing options...
Kevin Weddle Posted August 26, 2010 Report Share Posted August 26, 2010 Two N channel MOSFET's can replace the two IGBT's in your circuit. An H bridge is used to produce a polarity change across a load. If your circuit is an H bridge, then the load is what makes it an H bridge.It looks like the voltage at the output is fixed by the zener diode, from your schematic. Quote Link to comment Share on other sites More sharing options...
Hero999 Posted August 29, 2010 Report Share Posted August 29, 2010 Yes, just swap the IGBTs for MOSFETs but if it's HV IGBTs are probably better. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.