Tahmid's blog: Using the SG3525 PWM Controller - Explanation and Example: Circuit Diagram / Schematic of Push-Pull Converter

Please Tahmid, I designed 50HZ sine wave signal using OP-AMP and carrier signal of 20KHZ using OP-AMP. Can you tell me how to use SG3525 as PWM with this two signals to produce 50HZ PURE SINE WAVE signal for inverter . Because this SG3525 has shut down pin and the pin will be used for overload,battery low and AC ON shut down.