ACPL-K74T-000E

ACPL-K74T-000E application field and working principle

ACPL-K74T-000E, a 5-kV optocoupler manufactured by Avago Technologies, is categorized as a logic output optocoupler. An optocoupler, commonly known as an optoisolator, is a semiconductor-based electrical isolation component used to physically isolate electronic signals from each other, thus preventing signal contamination between electronic components in a circuit. In the ACPL-K74T-000E, an infrared light-emitting diode (LED) is optically coupled to a sensitive phototransistor, providing reliable yet minimal electrical isolation.

Application field of ACPL-K74T-000E

The ACPL-K74T-000E is an optocoupler with a top-notch 5-kV isolation rating; its power leakage current is also lower than most similar products, making it ideal for buffering, isolating, switching, and converting logic signals. In addition, the ACPL-K74T-000E’s wide temperature range provides improved performance in high-temperature environments. Thus, the optocoupler is often used in various industrial electronic applications, such as motor and power control systems, motion and automation control systems, electrical monitoring, medical equipment, and safety devices.

Working principle of ACPL-K74T-000E

The ACPL-K74T-000E optocoupler works on the principle of optical isolation. It consists of two separate circuits, isolated by a physical barrier. The input circuit houses a light-emitting diode (LED), while the output circuit contains a sensitive phototransistor. When a logic input is applied to the LED, a pulse of light is generated, which is detected by the phototransistor. This activates the phototransistor, producing a logic output at the collector of the phototransistor. The LED and phototransistor are completely isolated from each other, creating a barrier between the input and output circuits.

Advantages of ACPL-K74T-000E

The ACPL-K74T-000E is a “Zero Cross” optocoupler, meaning that it has zero-crossing detection between the input and output signals. This feature enhances the noise-resistance and fast switching of the device. In addition, its CTR (current transfer ratio) is rather high, greatly improving the stability of the device. Finally, its wide temperature range allows for a more reliable operation over varying temperatures. Thus, the ACPL-K74T-000E has reliable performance, fast response time, high electrical isolation, and wide temperature range.

Conclusion

The ACPL-K74T-000E optocoupler is an ideal device for buffering, isolating, switching, and converting logic signals. Its outstanding 5-kV isolation rating, low power leakage current, and wide temperature range provide excellent performance in a variety of applications. The Zero Cross detection makes the ACPL-K74T-000E an excellent choice for noise-resistance and fast switching, while its high CTR enhances stability. These features make the ACPL-K74T-000E a reliable and high-performance device.