U r welcome lollo,and that u said u need-like me- to build a prototype as i understood without,for ease,using MCU's,it is ok,i remember that in my qualification project,i managed to design and implement a symmetrical angle pwm driving circuit for an ac chopper with pll chip 4046 and a feedback frequency divider,with no microcontroller,that its programming may not be so easy. the results were impressive.
the matter of rating is no problem at all,it depends on the power circuit rating,while the drive circuit must have the capability of drivig such high power gate needs,which isn't a great deal,.
the time delay,for each two complementary switchs also must be taken in mind espeacially with high ratings,
i think the application note of microchip AN900 is very useful.
awaiting hearing from u
Mostafa