Relax the solver tolerances by placing this SPICE directive on the canvas: .options cshunt=1p chgtol=1e-15
Simulating complex analog/digital hybrid controllers like the TL494 can sometimes result in slow execution or initialization errors in LTspice. Oscillator Fails to Start
Search for a reliable TL494 SPICE .subckt file (often found in community forums or Github repositories like sunnyiisc/Spice-Model-Collections ). Create a New Component: Save the model as tl494.sub .
Vin (120V AC) --> Bridge Rectifier --> Vcc (170V DC) Vcc --> R1 --> TL494 (Pin 1) TL494 (Pin 2) --> R2 --> Q1 (MOSFET) TL494 (Pin 3) --> R3 --> Q2 (MOSFET) Q1 --> L1 --> Vout (12V DC) Q2 --> Vout
: Like many complex switching models, the TL494 can sometimes cause LTspice to slow down or throw "Time step too small" errors during high-frequency transitions. Idealized Behavior
Tl494 Ltspice Site
Relax the solver tolerances by placing this SPICE directive on the canvas: .options cshunt=1p chgtol=1e-15
Simulating complex analog/digital hybrid controllers like the TL494 can sometimes result in slow execution or initialization errors in LTspice. Oscillator Fails to Start
Search for a reliable TL494 SPICE .subckt file (often found in community forums or Github repositories like sunnyiisc/Spice-Model-Collections ). Create a New Component: Save the model as tl494.sub .
Vin (120V AC) --> Bridge Rectifier --> Vcc (170V DC) Vcc --> R1 --> TL494 (Pin 1) TL494 (Pin 2) --> R2 --> Q1 (MOSFET) TL494 (Pin 3) --> R3 --> Q2 (MOSFET) Q1 --> L1 --> Vout (12V DC) Q2 --> Vout
: Like many complex switching models, the TL494 can sometimes cause LTspice to slow down or throw "Time step too small" errors during high-frequency transitions. Idealized Behavior
