Tl494 Ltspice

* Oscillator (Pins 5, 6) * Note: Frequency depends on Rt/Ct. Simplified behavioral ramp here. * We generate a 0-3V sawtooth. A1 5 7 OSC RAMP=3 FREQ=100k * Note: Real implementation uses current source I=V(14)/Rt into Ct.

Since you requested a "good paper," I have structured this response as a technical application note. It covers the operating theory of the TL494, a guide to modeling it in LTspice, and a practical design example. tl494 ltspice

| Error Message | Likely Cause | Solution | |---------------|--------------|----------| | "Time step too small" | Fast switching + floating node | Add 1MEG resistors from each output to GND. Reduce maxstep in .tran . | | "Singular matrix" | Missing DC path to GND | Check the voltage feedback divider; ensure error amp inputs are not floating. | | Output always high or always low | Dead-time pin too high (>3V) or wrong oscillator | Set DTC <0.6V for max duty cycle. Verify RT/CT values. | | No oscillation at pin 5 | Missing ic initial condition | Add .ic V(osc_pin)=0.3V or use startup flag. | * Oscillator (Pins 5, 6) * Note: Frequency depends on Rt/Ct

Simulation steps:

Error amplifier 1: voltage feedback R1 FB 0 10K R2 OUT_FB FB 10K ; voltage divider from output V_REF 1IN- 0 DC 5 ; reference voltage R_FB 1IN+ FB 1K A1 5 7 OSC RAMP=3 FREQ=100k * Note: