high speed gate drive for mosfets

Oct 28, 2004 2 Replies

Hi all,



Has anyone got any idea for high speed switching for power mosfets ? a typical mosfet has like 3,000pf gate capacitance and my driver can just about cope with 1mhz, but 2mhz my drive wave appears like a sawtooth wave, so the mosfets never really hit fully on or so, so they heat up like hell... Theres some small info on using a class C and class E design though I dont have any experiance in these, I think the class c design is for ham radio users driving up into the 10mhz range...



If anyone can suggest something to look into then this would help me out...



thanks, chris


http://www.micrel.com/_PDF/mic4451.pdf

wow, thats one sexy bit of kit! thanks, Chris

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