Is there any reason I can’t reuse a gate driver for a number of parts in parallel?
You can drive three eGaN FET in parallel with only one driver, but each eGaN will need there own Rg, means if you use three eGaN in parallel that you will need three turn-on Rg (three turn-off Rg). You will need to be careful of layout, we hope that the layout loop and common source inductance should be same for each FET, since we want the current is average shared by three FETs.