...
>or providing the drive directly via a pulse transformer. All of these
>incorporate an element of black magic. The very large and rather
>rapid voltage swings as the upper FET/IGBT switches tends to produce
>large dv/dt' in your driver circuit which can lead to false and/or no
>triggering etc. Stray capacitance (and any other stray effects you
>can possibly think may exist :-)) need to be accounted for. Try doing
>a web search for terms such as "hi side drive*" or "h bridge".
...

There is no black magic in using pulse transformer. We have one of the HP
switched power supply in our lab and the drive in done on a half-bridge
using separate pulse transformers. The design is very simple, and works
perfectly ( pulse transformer + resistor + zener diode not to fry the gate )
I you are interested, please tell me, but only if it is for personnal
design ( HP would kill me/us else :-)


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N'oubliez jamais que nous voyons plus facilement la  /
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MERCY Jean-marc                 Maitre de conference /
University Montpellier 2                             /
Sciences et techniques du languedoc                  /
Place Eugene Bataillon                               /
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