Yes , that was very helpful . Thank you very much .
Initially there was a small delay included for the PWM initialization process. When I check in the oscilloscope, the MOSFET gate was on for around 440msec, before the PWM starts.
View attachment 68748
So, when that initialization delay is removed, then also for around 60msec, its high , as you mentioned.
View attachment 68749
10K pull up resistor is added to this line and issue is cleared. Now the MOSFET is switching without any problem .
View attachment 68750.
In the previous power supply case, the out put was regulated to 22V , but now, with the same code output voltage is regulated at 28V. Duty cycle is not going below to make the Vout 22V itself. (Now its seems to 24% duty cycle). So for checking , the duty cycle is fixed to 10%, (90% from PIC, since its in inverse mode) , but the Gate signal is seen as a improper pulse, to make the switch on , keeping the Vout in the 11.5V after the drop voltage.
View attachment 68752.
So whether this happens because, of the Pullup resistor and rest of the 2 stage transistor's delay's. Any way I just ordered TC4427, Mosfet Driver to overcome the issues of the transistor based drivers. But then also , just because of the interest to make it clear.
Once again , thank you very much
Geo