Isolated MOSFET gate driver VCC and VDD power suppl
No, it won't work. the supply of the high-side transistor (VDDA) needs to be floating. That is normally achieved by using a bootstrap circuit or a dc/dc convertor.
You need two supplies for the secondary (VDDs). The low-side can be a "normal" 15V but the high-side needs to be floating. 
It is normally recommended to joing signal gorund and power ground on one point only (called sometimes star connection)