LTSpice is the ideal platform because it handles transistor-level nonlinearities and switching transients better than many paid tools—and it’s free.
: Use a Schottky diode like the 1N5822 for efficiency. The Feedback Loop
Simulation tips:
: Users have reported that some TL494 LTspice models limit the PWM output voltage to ~4.8V, even if the supply ( cap V sub cap C cap C end-sub