While using this model I found a few issues and will soon publish an improved version.
Something that triggers my autism is the use of devices that can supply power within the IC, So it continues to function even when I kill power to it! I’m replacing the voltage sources with a linear regulator implementation using the opamp model and bandgap diode.
I’m not sure where you got the 3.65V voltage source for the oscillator. The datasheet assumes 3V nominal on the capacitor pin and when I tested a TL494 on a breadboard I found the voltage on the resistor to ground was a bit more than 2V. I’m looking through the datasheet to see if it says anything about this.