Quoting gardenyu : > > > Hello > > I have some IRF 3205 fets at hand, this is a slow one, its gate > charge is about 40nC. Since I need to increase the switching > frequency to about 100k Hz, thus I need a strong enough gate driver > chip to deliver a big current, thus switching loss will not be a too > big problem. > I also need a disable pin on the gate driver chip for safety > issue if possible. > There is a tradeoff between price and performance, as I have > found some processor oriented fast chips and weak ones, have you > ever found a design guide for gate driver IC, including how to find > a suitable gate resistor, etc? IR has some very good application notes, check those out for sure. Microchip also has some nice gate driver chips capable of >5A. Be aware (beware) of all aspects of circuit design, including layout for this sort of thing. Best regards, Spehro Pefhany -- "it's the network..." "The Journey is the reward" s...@interlog.com Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist