TL494 is a fixed frequency, pulse width modulation control circuit designed primarily for SWITCHMODE power supply control. It features complete pulse width modulation control circuitry, on-chip oscillator, error amplifiers, 5.0V reference voltage, adjustable deadtime control, etc.
The TL494 and its automotive‑grade variant NCV494 provide a complete pulse‑width‑modulation control solution for switch‑mode power supplies. The device integrates an on‑chip oscillator, master/slave operation, error amplifiers, a 5 V reference, adjustable dead‑time control and uncommitted output transistors rated to 500 mA.
The datasheet details maximum ratings, recommended operating conditions, electrical characteristics, ordering information, package dimensions and application notes, enabling designers to select the appropriate package and configure the IC for push‑pull or single‑ended operation.
| Power Supply Voltage (Voc) | 7.0 V – 40 V |
|---|---|
| Collector Output Voltage (Voi) | up to 40 V |
| Collector Output Current (per transistor) | 500 mA |
| Oscillator Frequency | 1 kHz – 200 kHz |
| Reference Output Current | 10 mA |
Each output transistor can source or sink up to 500 mA.
The oscillator frequency can be set between 1 kHz and 200 kHz.
The recommended supply voltage is 7 V to 40 V.
The reference output current is 10 mA.