Peter C. Wallace wrote: > > PS: we blew a couple 75A 1200V Darlintons trying to make a constant > current dynanometer load, so the lesson about secondary breakdown (or FBSOA) > kinda sticks with me :-) > I had a fantastic chat with an IR engineer about the characteristics of IGBTs. He said to never let them operate in the linear region, even for sub-us periods. The positive temp coefficient of the basic element in the linear region will cause current hogging to the center of the die, and so just the center elements will be conducting all the current until full saturation occurs. This will destroy the device very quickly, sometimes within a few microseconds!
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