Tl494 Ltspice Jun 2026

The is a staple in power electronics for fixed-frequency pulse-width-modulation (PWM) control. However, if you've opened LTspice recently, you probably noticed a problem: there is no native TL494 model in the standard library.

* Dead Time & PWM Logic (Pin 4) * Dead time voltage effectively offsets the sawtooth floor or clamps the comparator. * If V(4) > Sawtooth, Output is OFF. * Effective PWM comparator: Duty Cycle = (V_saw - V_dead) / V_saw_amp. tl494 ltspice

Reviews and forum discussions highlight several critical performance quirks when simulating the TL494 in LTspice: The is a staple in power electronics for

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Outputs drive MOSFET (simplified) R_GATE OUT1 0 100 R_GATE2 OUT2 0 100 * If V(4) > Sawtooth, Output is OFF

Add this as text on your schematic for a 50 kHz push-pull converter:

Outputs are active low, push-pull or open collector E_PWM 130 0 VALUE IF(V(7,9) > V(6,9), 0, 5) R_PWM 130 0 1MEG