On Fri, Jun 15, 2012, at 12:01 PM, Jon Elson wrote: > 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.
What Jon said. MOSFETs rule the low voltage world. But IGBTs are still competitive when you start talking about 240V input drives (340V DC bus, 600V transistor rating). And IGBTs completely dominate at 480V input (680V DC bus, 1200V transistors). You can find a few 1000V, 1200V, or 1500V MOSFETs, but very few, and their performance stinks. They can handle a few amps at most, and have very high on-resistances compared to lower voltage ones. Meanwhile, you can buy 1200V IGBTs in current ratings from a few amps to something like 3600 amps. -- John Kasunich [email protected] ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
