The schematic diagram of the circuit is shown below:
If you want a quick, no-download model, create a behavioral oscillator + PWM: tl494 ltspice
Instructions on how to perform a to test your loop stability. The schematic diagram of the circuit is shown
Offers a dedicated input to establish a fixed minimum dead-time, preventing shoot-through currents in push-pull configurations. tl494 ltspice
Modulation of output pulses is accomplished by comparing the sawtooth waveform from the oscillator to control signals from the error amplifiers or the DTC input. The output stage is enabled when the sawtooth voltage is greater than these control signals. This mechanism allows for precise duty cycle control from nearly 0% to 49% per output in push-pull mode.