TL494 is a chip used for the control circuit of PWM switching regulator. It has a 5V reference voltage circuit, two error amplifiers, flip flop, an output control circuit, a PWM comparator, a dead time comparator and an oscillator. This device can be operated in the switching frequency of 1KHz to 300KHz.
The TL494 is a PWM controller used in step‑down switching regulators. It features an internal 5 V reference, uncommitted output drivers, error amplifiers, and a programmable oscillator that can operate from 1 kHz to 300 kHz.
The document lists absolute maximum ratings, electrical characteristics, mechanical dimensions, ordering information, and a life‑support policy. Key parameters such as supply voltage, output current, reference voltage, and temperature range are detailed for designers.
| Maximum Supply Voltage (VCC) | 42 V |
|---|---|
| Maximum Output Current | 250 mA |
| Oscillation Frequency Range | 1 kHz – 300 kHz |
| Operating Temperature Range | 0 °C – +70 °C |
The TL494 can tolerate a supply voltage up to 42 V.
It operates from 0 °C to +70 °C.