Hello!
I already informed U in pvt mail that U have to use either Pulse txrs or
opto isolators for driving. Bridge driver ICs don't work more than 100volts.
All U have to do is put the txrs/optos in output of Ur circuit or use simple
bridgedriving ICs and txrs. In case of Opto's U have to steal driving current
with high resistors and zeners and use 1more transistor/gate to make fail-safe. Means when signal the FET remains off. I think that in this respect
the pulse transformers are ideal solution and cost no more than Rs.12-15 each. U can also borrow some technic and keep the gate reverse biased
during off period.
Many circuits are available on Fairchild's website as they have most the
driving ICs and POWER mosfets.