ACPL-K72T-500E

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Optoisolators – Logic Output is an important device enabling signals to pass in different circuits safely. ACPL-K72T-500E, an optically-coupled MOSFET transistor, is an example that has a wide application field, and works on the principle of isolating the input signal from the output circuit to provide superior circuit protection. In this article, the applications, working mechanism and pinout configuration of ACPL-K72T-500E shall be discussed.

Application Fields

ACPL-K72T-500E is in the form of the dual channel MOSFET transistor, which offers an integrated solution with the advantages of both a photocoupler and an MOSFET transistor. It provides excellent signal transmission isolation efficiency, noise immunity and range of applicability, due to which it is commonly used in power supply circuits, DC Drives and Programmable Logic Controllers (PLCs). The device is applied in circuits that require a fast speed response where conventional devices lack in performance.

Working Principle

The device consists of two major components – a light emitting diode (LED) and an integrated MOSFET. The LED operates as an input component, directly receiving the electrical input, and the integrated transistor components act as output components. The optical isolation of this device is accomplished when an electrical input is applied on the LED side, inducing an equivalent current through the LED. This causes the LED to emit a beam of light that is optically coupled towards the integrated transistor component.

The light that is emitted from the LED activates the photosensitive MOSFET, allowing current to flow from the drain (output) to the source (input) section of the integrated transistor. The amplification of the input signal by this MOSFET allows the high voltage signal on input side to be effectively transferred to the output side. This optically isolated signal is transmitted to the output section of the circuit, providing effective insulation between the input and output circuits.

Pinout Configuration

The ACPL-K72T-500E optically-coupled MOSFET transistor comes in 5-pin dual in-line package (DIP) configurations. PIN 1 and PIN 5 are the input pins which are connected to the LED side, and the other 3 are the output pins – PIN 2 being the drain, PIN 3 being the source and PIN 4 being the gate. The PIN 1 and PIN 5 represent the VCC and GND pins which carry the highest voltage and provide the ground reference voltage respectively.

In conclusion, the ACPL-K72T-500E optically-coupled MOSFET transistor is an effective device for providing electrical isolation between input and output circuits, enabling safe passage of signals between different circuits. Its various applications, working mechanism and pinout configuration have been discussed in this article.The specific data is subject to PDF, and the above content is for reference