Hi Ahammad,
Here I am providing one of the possible approaches which provides the desired result.
Set the pulse width of a pulse generator to 30% which generates the output such that it will be high upto 0.3 microsec and zero for remaining time.
Multiply the pulse generator output with output of PI Controller. A NOT gate can be used to get the output for remaining time.
Here I am attaching the Simulink layout and its output.