Tl494 Ltspice May 2026

LTSpice doesn’t include a built-in TL494 device, so you have three realistic options:

Below is a step-by-step walkthrough for option 1 (using a vendor model) and a compact alternative using a behavioral subcircuit for quick tests. tl494 ltspice

| Parameter | Change | Effect | |-----------|--------|--------| | Frequency | C_CT or R_RT | f ≈ 1.1/(R_RT * C_CT) | | Duty cycle | Modify DTC voltage on pin 4 | Max duty ~96% if pin 4 grounded | | Feedback | Change R1/R2 divider | Sets output voltage | | Compensation | Adjust R_COMP, C_COMP | Loop stability | LTSpice doesn’t include a built-in TL494 device, so

Expected waveforms: