This document describes the features and characteristics of TL494, including internal stable 5V reference supply, output control, variable duty cycle control, etc.
The TL494 is a PWM controller for switching regulators, featuring an internal 5 V reference, uncommitted output driver, error amplifiers, and an on‑chip oscillator that can operate in master or slave mode. It supports variable duty‑cycle control from 1 kHz to 300 kHz and can drive push‑pull or single‑ended topologies.
The datasheet lists absolute maximum ratings, electrical characteristics, mechanical dimensions for 16‑DIP and 16‑SOP packages, ordering information, and a life‑support policy disclaimer. A typical step‑down converter application circuit is also shown.
| Supply Voltage (VCC) max | 42 V |
|---|---|
| Output Current max | 250 mA |
| Operating Temperature Range | 0 °C to +70 °C |
| Oscillation Frequency range | 1 kHz to 300 kHz |
The TL494 can tolerate a supply voltage up to 42 V.
It operates from 0 °C to +70 °C.