I WANT TO DESIGN H BRIDGE WHICH CAN DRIVE 400WATT DC SERVO MOTOR PLZ HELP

 

I WANT TO MAKE IT WITH ALL N-MOSFET

 

Have you searched on high-side driver? There are many dedicated N-channel mosfet drivers with bootstrapping and logic for driving the high-side gates and preventing shoot-through.

John

 

How come a servo motor needs an H-bridge?? Are u using an ordinary DC motor or Servo motor 3 pin??

 

I think the OP is asking about designing his own servo.

Inside the servo to which you refer is a circuit board, which probably has an H bridge or something to control direction electronically. There may also be control of speed for some servos.

John

 

That is true..whatever a motor may be, inside most dc motors is only 2 brushes basically..

 

Have you searched on high-side driver? There are many dedicated N-channel mosfet drivers with bootstrapping and logic for driving the high-side gates and preventing shoot-through.

John

Hi,

There are many high side drivers for this, such as:

IR2110, IR2113, IR2181 - IR
L6385, L6387, L6384 - ST
FAN73832 - Fairchild

 

Some Ideas

http://www.next.gr/other-circuits/h-bridge-circuits/