I have designed this Buck Converter which convert 60VDC to 12VDC at 10A.
Switching Freq 100KHz.
Facing MOSFET too much heating issue.
MOSFET ON time and OFF time is decided by a UC3845B based circuit. MOSFET gate is biased with 2.2R resistor and pull down of 5.1K
is there any way to reduce MOSFET heating?
I've increased MOSFET rating to 110A 80V. Previously was 75V 75A but no succcess.
Edit 1: Updated Schematic for better understanding.
Edit 2: Previously tried this INFINEON MOSFET. Heating was less.
Then used this ST MOSFET.
Heating was more in ST MOSFET
Hello, here is an update, can I use below circuit as bootstrap?
here in place of 5V Input either I can use 60V directly or 12V from output.