Quote:
Originally Posted by George Tyler
the top fets need to be P-channel, and the drive needs to be inverted. you can use N-channel, but then you need common drains, not sources?
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As you noted, you can use all N channel you just need to drive the gate voltage higher than what your getting in. With my charge pump circuit I can do it. Doing all N channel fets provides an advantage as they have lower on resistance.
I did look at the IR parts. I like the Linear parts more though. The national part might be the best of the lot but I can't get a simulation model of it to work.
I have a working simulation with the linear part in LTspice. It does have problems that appear to be artificial (won't let me simulate ff all fets are the same, Glitch spikes and ringing). Other than than it works quite well.
I can send it to you if you like. (it is a bit messy)