> Can you explain how this (G-S diode) is supposed to work?  My gate=20
> switching seems to be quite clean, so not sure what this will protect=20
> against.
> http://bit.ly/1Ywuwia

I should have mentioned that in the IR document is

"A more fundamental solution, of course, is to make the
impedance of the gate circuit low enough that not only is
the gate-source voltage rating not exceeded, but also the
voltage transient at the gate is contained to a level at which
spurious turn-on does not occur"

As you have a proper FET driver the zener may not be
necessary. In the case where the drive is not strong (ie
not low-Z, such as a micro or small transistors) the driving
components may not be able to clamp transients and you
would need a zener, particularly when the load is turned
off and the field collapses

Joe


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