Hi,
I am trying to decide what is the best way to drive a 600V Hbridge, which requires fast (optimally 10ns or shorter) switching.
The two options I see are either a gate drive transformer, 1 primary, and two secondaries for driving each leg of the 600V Hbridge. Will the leakage inductance of the gate drive transformer may cause excessive gate ringing at this fast switching speed?
The second option is an isolated 18Volt supply with an optoisolated high current fetdriver IC. The required common mode resistance of the optoisolator will have to be 60kV/us at 10ns switching speed for
600Volts I think, the fastest opto I've seen so far is 15kV/us (HCPL-3120) I guess there are faster ones though?Which of these two options would work best at this high voltage, fast switching?
cheers, Jamie