Determinism. Exact same timings, every time, all the time. More immediate, potentially simultaneous, reactions to events with much, much less time variability. Always the same number of clock cycles if you are using a clock.
It's also easier to replace a CPLD than an MCU if it goes obsolete, especially between brands since the "code" is far more ...
You are way-off in your expectations. The peak flux density you will see is over 7 teslas and that's about 15 to 20 times more than what ferrite can handle: -
Peak voltage = 150 volts
Inductance = 4 turns squared x 3300 nH = 53 uH
V/L = 2.83 amps per micro second
At 100 kHz (and 50% duty) the peak current is 14.15 amps
Magneto motive force (MMF) = amps x ...
I need a open loop system where I can Vary the PWM duty cycle within
the range using a potentiometer without taking a sample from output.
Is it possible with this chip?
Clues are in the data sheet such as this lab test fixture: -
Look bottom left and you'll see a switch that can be set to position 1 - this applies a 10 kohm feedback resistor to the error ...