The schematic diagram of the circuit is shown below:
Pin 13 dictates whether the dual output transistors operate in parallel or push-pull mode:
(Use this only as a starting point — replace with proper behavioral expressions or an op-amp subcircuit. This quick model shows how to wire an oscillator, error amplifier, and comparator.) tl494 ltspice
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.
Verify that the REF pin (Pin 14) shows a steady 5V during simulation. The schematic diagram of the circuit is shown
Click Simulate -> Edit Simulation Cmd .
Use the auto-generate feature: Open the .sub file in LTspice, right-click the .SUBCKT line, and select 3. Pro-Tips for Accurate Simulation Use the auto-generate feature: Open the
Dual transistors capable of collector-emitter sourcing or sinking up to 200mA, adding immense drive flexibility. Sourcing and Installing the TL494 LTspice Model
There are two main ways to "develop" this feature in your local setup: Open your schematic in LTspice. Press 'S' to open the SPICE Directive box.
Websites like DIYstompboxes or EEVblog forums have user-created TL494 subcircuits. These models are behavioral rather than transistor-level, meaning they run faster but may ignore some second-order effects (like temperature drift).