I'm using an IRF540N power MOSFET in a 12V to 24V DC converter. But the MOSFET getting over heated when its connected to source. Before providing a gate pulse its getting very hot. I have attached the schematic here. And the load is a LED lamp of 15W. Battery capacity is 26Ah,12V battery.
MOSFET is driven from a PWM of 100KHz with the duty cycle of 0.7. But is hetting up more before connecting it to the gate pulse.
What might be the possible reasons? Please help me to improve the design.