Dc to Dc Buck Converter and Mosfet Driver

[Tony_Ulp]

I am trying to design dc to dc buck converter to be controlled by micorcontroller or fpga.

The problem i am having is that the gate resistor is getting hot quickly. (please see attachment - diagram excatly as
connected on the stripboard).

1. Can you please have a look at the diagram and advise me whats wrong. TC4451 inverter / TC4452 non inverter. (only had these types available)
Resistor between gate and source. Do i need one for this application? how to calculate the value?
2. I want to test buck converter with external pwm, e.g. 555 timer just to be sure is working ok beforeconnected to micorcontroller / fpga board.

Please help me with this project i really appreciated.


Thank you very much

Tony

 

[pradeep.g.belchada]

why you use that tc4451 instead of ir 2110 gate driver

 

[Tony_Ulp]

Only had those available at a time

 

[ea.arun]

reason could be the frequency at which you are driving the MOSFET is too high......

EA

 

[FvM]

reason could be the frequency at which you are driving the MOSFET is too high......

It's primary wrong gate driver level as discussed in another (cross-posted) thread. https://www.edaboard.com/threads/298702/