Ltspice | Tl494

Here’s a solid, practical guide to using the TL494 PWM controller in LTspice.

.lib TL494.sub
Vcc Vcc 0 15
Rrt N005 0 10k
Cct N004 0 10n
XU1 Vcc 0 0 Vcc N004 N005 0 out1 0 out2 Vcc Vref Vcc 0 0 TL494
* Pin order: VCC, GND, DTC, FEEDBACK, CT, RT, IN1-, IN1+, IN2-, IN2+, OUT CTRL, C1, E1, C2, E2, VREF

Oscillator: approximate with a sawtooth generated by an integrator and reset via a behavioral current source Rrt RT_NODE 0 1k ; placeholder for RT connection Cct CT_NODE 0 1n ; placeholder for CT connection tl494 ltspice

(pin 5) to ensure it is producing the expected sawtooth waveform. Here’s a solid, practical guide to using the