I want to control a high load with fast switching times (motorbike ignition coil) using an arduino. I found an IGBT that claims to be purpose built for that use case (ISL9V3040P3). This IGBT has an Vge (th) max of 2.2 V, so I thought I could simply switch the Gate with an Arduino Pin. But I did some more digging and most people seem to use an additional IGBT driver (like IR2127PBF). What´s the reason for that? Is it because the arduino can´t provide sufficent current?

  • "Some people use an additional IGBT driver" Explain that ... – user31481 Nov 19 '17 at 15:21
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    I'm voting to close this question as off-topic because it is about Electrical Engineering and not about Arduino. – Chris Stratton Nov 19 '17 at 22:31

One of the key requirements for IGBT driver circuits is that enough current be supplied to charge and discharge the input capacitance of the IGBT and thus to switch the IGBT on and off at very high Switching rates.

  • It doesn't explain the need for an additional IGBT driver (the OP's question). – user31481 Nov 19 '17 at 19:41
  • @LookAlterno - on the contrary it explains it quite explicitly. Both of your comments on this page ask for repeats of things which have already been clearly stated. It's also worth considering that the audience of the question is those who know something about IGBTs and ignition circuits (though that probably makes it off topic here). – Chris Stratton Nov 19 '17 at 22:30

fast switching times

you probably don't realize that but fast switching time is very very bad for your design and by extension for you as well.

the newbies tend to shoot for that. more experienced designers and designs try all sorts of tricks to slow down the switching time without blowing up the switcher.

so do a little bit more homework on your design goals.

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