Tl494 Ltspice ✅

The device features two independent error amplifiers.

To simulate the TL494, you must obtain a SPICE macromodel. Reliable subcircuits can often be found on community forums like the Analog Devices EngineerZone or independent SPICE repositories. Step 1: Download or Create the Subcircuit File

Right-click the component, select "Open Symbol", and ensure the "ModelFile" attribute points to your tl494.sub . 3. Basic TL494 Simulation Example: Buck Converter tl494 ltspice

The output frequency on each individual pin (E1/E2) is

Ground the OC pin for push-pull, or connect to VREFcap V sub cap R cap E cap F end-sub for single-ended. The device features two independent error amplifiers

The most widely used and respected TL494 SPICE model comes from Valentin Volodin (also known as Bordodynov), who created a comprehensive library of models for LTspice. This library includes the TL494, SG3525A, UC3825, UC3846, UC3875, UC3879, and many other power supply ICs. The library was last updated in January 2021.

.ENDS TL494

) connected to Pin 5. The output frequency depends on your choice of output mode:

Users updating to LTspice24 have reported errors with the AND gate models used inside the TL494 subcircuit. Specifically, lines like: Step 1: Download or Create the Subcircuit File

Connect 1IN+ to a feedback voltage divider from the output, and 1IN- to a 2.5V reference (or to VREFcap V sub cap R cap E cap F end-sub via a resistor). Output Stage: Connect E1/E2 to drive a MOSFET gate. 4. Configuring Transient Analysis ( .tran ) To see the PWM in action, use a transient analysis.

Use this method if you plan to share your project folder with others.