TL494 is an integrated pulse-width modulation power control chip with 200mA sink or source current output, single-ended or push-pull output control, internal circuit prohibition of double pulse output, variable dead-time control, internal regulator providing 5V reference power supply, and circuit architecture that facilitates synchronization.
The TL494 integrates all functions needed to build pulse‑width‑modulation control circuits on a single monolithic chip. It includes an error amplifier, adjustable oscillator, dead‑time control comparator, and output‑control circuitry, offering both single‑ended and push‑pull operation.
The document provides detailed specifications such as supply voltage range, output current limits, oscillator frequency, and switching characteristics, along with test circuit diagrams and absolute maximum ratings for reliable design implementation.
| Supply voltage (Vcc) range | 7 V – 40 V |
|---|---|
| Collector output current (each transistor) | 200 mA |
| Oscillator frequency range | 1 kHz – 300 kHz |
| Output voltage rise time (common‑emitter) | 100 ns – 200 ns |
The recommended supply voltage (Vcc) is between 7 V and 40 V.
Each output transistor can handle up to 200 mA of collector output current.
The oscillator can operate from 1 kHz up to 300 kHz.