[Diy_efi] IGBT for coil driver?

[Tomas Sokorai Sch.]

On Monday 08 July 2002 11:32, Bevan Weiss wrote:
> You might want to check out the data sheet for the IGBT, it may already
> have a reverse protection diode, you would have to make sure that it would
> be suitable however.  It is unlikely that the breakdown voltage of the IGBT
> would be enough (on its own) to withstand the collapse of the ignition coil
> (of course this would depend on the saturated current in the coil, and the
> inductance of the coil).  This means that it would be wise in any case to
> use a seperate diode to relieve the IGBT of the inductive kick when you
> switch off the current.
>

Thanks, I guess I'll get a suitable (BYM25E maybe? that's for 1000V) diode as 
this igbt does not have a built in diode, but more or less,  what voltage is 
seen in the kickback of these oil filled coils? 
According to the datasheet the breakdown voltage is 600V

Tomas

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