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From: Winfield Hill <hill@rowland.harvard.edu>
Newsgroups: sci.electronics.design
Subject: Re: ping Win, SiC fets
Date: 3 Nov 2016 11:29:22 -0700
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John Larkin wrote...
>
> Can you reveal what you're using for gate drivers?

 Hah, I now have 6 different versions of the board,
 with six different gate-driver approaches, trying
 to reach my 10MHz repetition-rate goal.  I'm not
 happy with any of them.  My latest scheme gives up
 on TO-220 driver ICs, and uses a fast recent-vintage
 driver.  I suffer its poor thermal properties, and
 add NPN and PNP emitter-followers to handle some of
 the C V^2 f power dissipation.  Note that SiC MOSFETs
 have 1/4 the capacitance but require twice the gate
 voltage, hence 4x more power killing that advantage.
 The dissipation is now shared by two 1812 resistors,
 two sot-223 BJTs and the driver IC.  The latter has
 a heatsink.


-- 
 Thanks,
    - Win