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Optoisolators - Transistor, Photovoltaic Output

Optoisolators, sometimes called opto couplers, are electronic components which use light to connect two almost independent circuits. One of the most common types is the transistor, photovoltaic output optoisolator, such as the OPI1270-040. This article will discuss the application field and working principle of this particular optoisolator.

Application field

The OPI1270-040 is designed for use in AC input applications. It has very low power consumption, and can handle up to 230 volts AC input. It is commonly used in power supplies, motor drivers, and lighting control systems. Its isolation of 2 kVrms and its operating temperature range of -40°C to +85°C make it suitable for a variety of applications in challenging environments.

Working principle

The OPI1270-040 optoisolator contains two main parts, an input side, and an output side. On the input side, an AC signal is applied to an LED. The LED produces light which is then detected by a light sensitive photovoltaic diode, which is connected to the output side. The output side then uses a transistor to amplify the input signal, and the amplified signal is sent to the output terminal.

The optoisolator provides electrical isolation between the input and output. This means that even if the input signal is affected by current or voltage variations, the output signal is not affected. This isolation also helps to protect the input circuit from any everages or short-circuits on the output side.

The OPI1270-040 optoisolator has an input-output delay of less than 4 μs. This fast response time makes it suitable for a variety of applications, including industrial automation systems and high speed communication systems. It is also designed to be durable, and can handle up to 100 kV surge voltage.

Conclusion

The OPI1270-040 optoisolator is designed for use in AC input applications. It is an ideal optoisolator for applications that require reliable isolation and fast response times. Its low power consumption, durable construction, and high voltage surge protection make it suitable for use in a variety of challenging environments.

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