Tl494 Ltspice -

If the output oscillates wildly, your feedback compensation network is not optimized. Start by adding a capacitor in parallel with the feedback resistor to create a simple lag compensator.

fosc=1.2RT×CTf sub o s c end-sub equals the fraction with numerator 1.2 and denominator cap R sub cap T cross cap C sub cap T end-fraction Frequency Calculation Example If your target switching frequency is tl494 ltspice