The following is an example of a basic TL494 model:
To perform a transient analysis of the circuit, we can use the .tran directive: Tl494 Ltspice
The TL494 is a monolithic PWM controller IC that integrates all the necessary functions for a high-performance PWM controller. It features a voltage reference, error amplifier, PWM comparator, and output drivers. The TL494 is widely used in switching power supplies, where it controls the output voltage by regulating the duty cycle of the PWM signal. The following is an example of a basic
.four 1k 10 This directive tells LTspice to perform a Fourier analysis of the circuit at a frequency of 1kHz with 10 harmonics. Tl494 Ltspice
Once we have created the TL494 model, we can simulate it in LTspice. The following is an example of a simple circuit that uses the TL494 to control a switching power supply: