[ List Subjects ][ Current Board ][ Post Message ]
Subject: Re: Series Connection of IGBTS,MosFet
[ View Followups ][ Post Followup ]
Date: 03/15/00 at 3:20 PM
Posted by: John Dunn - Consultant
In Reply to: Series Connection of IGBTS,MosFet posted by Holger Cecchin on 03/15/00 at 2:02 AM:
Putting multiple devices in series for high voltage switching is one tricky business
indeed! The upper switch(es) would have to have their drive signals floating on a
switched common-mode high voltage signal and yet not be corrupted by that.
Also, all of the turn-off dV/dT's would have to be balanced by snubber networks
to keep from transiently exceeding the voltage standoff capability of one or
another of the stacked devices.
Given these difficulties, I would strongly suggest that you get in touch with
vendors of the proposed devices, such as International Rectifier let's say, and see
what they would advise!
John Dunn - President
Post a Follow-up: