Tl494 Ltspice Today

You cannot simulate the TL494 without a .sub (subcircuit) file and a corresponding .asy (symbol) file.

Sweep the voltage at pin 4 from 0V to 3V using .step param V_DT 0 3 0.5 . Watch the maximum duty cycle drop from 96% to 0%. This is invaluable for transformer-based designs like push-pull or forward converters. tl494 ltspice

* Example: buck with TL494 (sketch) V1 VIN 0 24 XU1 VIN 0 FB COMP RT CT DTC SS OUTC OUTE ILIM tl494 M1 SW 1 0 0 nmos_model Rds=0.05 D1 SW VIN D1model L1 SW OUT 33u Cout OUT 0 220u ESR=0.05 Rload OUT 0 12 * Feedback divider to FB (set for 12V out) Rfb_top OUT Vfb 10k Rfb_bot Vfb 0 10k * Sense resistor to ILIM Rsen SW ILIM 0.1 .tran 0 100m .include tl494.subckt You cannot simulate the TL494 without a

: Contains a frequently referenced .sub file for the TL494. tl494 ltspice