IR2104 - Bootstrap to MOSFET source

Discussion in 'General Electronics Chat' started by Skubby SkinnyChubby, Aug 24, 2015.

  1. Skubby SkinnyChubby

    Thread Starter New Member

    Jun 19, 2015
    25
    1
    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! :)
     
    • 1.png
      1.png
      File size:
      58.6 KB
      Views:
      9
  2. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,541
    2,369
    Just read the IR app notes, IR2110 etc to find why you need a gate voltage above the +supply.
    Max.
     
    Skubby SkinnyChubby likes this.
  3. shortbus

    AAC Fanatic!

    Sep 30, 2009
    4,009
    1,530
    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.
     
    Skubby SkinnyChubby likes this.
Loading...