gene heskett wrote: > Generally speaking, the igbt stuff I have observed has a noticeably slower > turnon/turnoff times, which when coupled with their quite a bit higher "on" > resistance, does lead to heat problems. Right, IGBTs don't make sense for anything under 200 Volts. The MOSFETs are getting much better, with insanely low on resistance, like 9 milli-Ohms. The IGBT is a bipolar transistor, so it will never get below 0.7 V voltage drop. And, as you note, they are quite a bit slower than FETs.
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