Tl494 Ltspice =link= [ 10000+ CERTIFIED ]

The frequency of the internal oscillator is set by the classic formula:

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

Triangle Wave Generation B_osc 103 0 V=(TIME*500k) % 1 ; Simplified Sawtooth representation tl494 ltspice

Run a DC operating point ( .op ) before the transient analysis. Check that the error amplifiers are biased correctly (pins 1, 2, 15, 16 between 0 and VCC).

(initial conditions) command to set voltages on capacitors like the timing capacitor ( cap C sub cap T The frequency of the internal oscillator is set

To simulate it, you must create or import a SPICE model. Below is the step-by-step process to get the TL494 running in your LTspice environment.

* VREF Generator (Pin 14) B1 14 7 V=5

Locate or download a TL494.sub file and save it inside your LTspice library subdirectory: \Documents\LTspice\lib\sub\

: If the model is a subcircuit, you can open the text file in LTspice, right-click the line, and select "Generate Symbol" Manual Placement : Alternatively, place the standard or a generic DIP-16 symbol and use the (initial conditions) command to set voltages on capacitors

Several hobbyist and open-source communities have created reliable TL494 models for LTspice. Look for models from:

The visual schematic symbol that maps the pins to the subcircuit netlist. 2. Installing the Model in LTspice