Circuit Diagram - Tl494

Keep the timing component traces ( RTcap R sub cap T CTcap C sub cap T

Ensure the trace lengths connecting RTcap R sub cap T CTcap C sub cap T

If you are working on a custom power supply project, would you like to explore adding using the second error amplifier, or do you need assistance calculating the component values for a different switching frequency ? Share public link

The TL494 is a versatile, fixed‑frequency PWM controller originally designed for switching power supplies. It integrates the core functions needed to build regulated DC–DC converters: an error‑amplifier section, an internal oscillator, a dead‑time control input, a pulse‑width modulator with a comparator, an output‑transistor driver stage, and an overcurrent/feedback control pin. Its flexibility makes it suitable for flyback, forward, push‑pull, half‑bridge, and SEPIC topologies as well as simple switching regulators. tl494 circuit diagram

Which would you prefer?

Configuration A: Push-Pull Topology (Inverters & Step-Up Converters)

pull-down resistor from the transistor base to ground to guarantee clean turn-off performance. Keep the timing component traces ( RTcap R

fout=12⋅RT⋅CTf sub o u t end-sub equals the fraction with numerator 1 and denominator 2 center dot cap R sub cap T center dot cap C sub cap T end-fraction

is typically used for overcurrent protection. It monitors the voltage drop across a low-resistance shunt resistor in series with the load. 4. Standard TL494 Circuit Diagrams

Pins 1, 2, 15, and 16 feed into two independent operational amplifiers. They feature a high common-mode input range spanning from Its flexibility makes it suitable for flyback, forward,

The TL494 is a monolithic pulse-width modulation (PWM) control circuit designed by Texas Instruments. Introduced decades ago, it remains an industry-standard building block for switched-mode power supplies (SMPS), DC-to-DC converters, and inverter circuits. Its architectural flexibility allows designers to configure it for push-pull, half-bridge, or single-ended topologies.

Adjusting the potentiometer changes the duty cycle from ~0% to ~95%.

To ensure your TL494 circuit functions reliably, keep these points in mind: