Hello,
I'm looking into the implementation of a (relatively low current) ZVS H Bridge design that should work in the frequency range of 1-7MHz.
Mosfets are BSN20--7DICT for each half bridge.(Rgate = 10ohm)
Right now I'm evaluating the UCC27211 a a high speed halfbridge mosfet driver. (Cboost =30nF)
The low side works fine but I experience strong ringing at the high side mosfet, that already results at deadtimes of 50ns at switching freuqnecies of 1 MHz into relatively high currents in the half bridge.
Is there a workaround for the UCC27211 - or is there a better suited (halfbridge, fullbridge) mosfet driver - here obviously especialy with regard to the highside problem - for high frequency operation ?
Cheers,
Thorsten