Tl494 Ltspice [better] Link

: Use the OC (Output Control) pin to switch between single-ended (grounded) or push-pull (connected to REF ) modes [1]. 3. Quick Tips for LTspice Simulation

Probe the output pin (Pin 9 or 10) and the switching node. You should see a PWM square wave tl494 ltspice

Frequency = 1/(RT*CT), typical range 1kHz-300kHz E_OSC_TRIG 110 0 VALUE V(100)*0.7 ; ~70% duty cycle max G_OSC 0 7 VALUE IF(V(7,9) < V(110) & V(12,9)>4, 1e-3, 0) C_OSC 7 9 1n IC=0 R_OSC 7 9 1MEG : Use the OC (Output Control) pin to

The TL494 is primarily voltage-mode. However, you can implement current-mode by feeding the current sense signal into the second error amplifier (pins 15/16) and OR-ing it (via diode) to the compensation pin. Simulating this requires careful tuning of the current ramp slope compensation to avoid subharmonic oscillations. You should see a PWM square wave Frequency

To use the TL494 in LTspice, you must download two files—the subcircuit (.sub) symbol (.asy)