Dynguyen:
Follow up question about the isolated supply based solution. Should I still have the bootstrap diode coming in? It seems like it could help supply power when the low side is off, but maybe it could be detrimental. I suppose with the diode it could never pull the capacitor down. I'm assuming I still want a capacitor there to even out the supply. Is there any problem with a 10u one? I figure that's enough to ride out any high current draws and once switching has occured the DCP02 should keep the power up.
Here is what I'm designing at the moment, in an eloquently annotated drawing
View attachment 110451
Edit, just noticed this is from the newer version of the board I'm working on. But I figured I'd post it in this thread since the isolated supply circuit was mentioned here.