Hi guys!

can someone explain to me why i need to have this connection from bootstrap cap to MOSFET source?

image attached

thanks again guys!

 

Just read the IR app notes, IR2110 etc to find why you need a gate voltage above the +supply.
Max.

 

Where else will you get a path to ground(common) to charge the boot capacitor? When high side is off, the low side is on and gives a path to ground and charges boot cap.