EL817(S)(C)(TU)

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Optoisolators are important tools used in a variety of applications to isolate two sections of a circuit from one another. The EL817(S)(C)(TU) is an optoisolator that uses a phototransistor and a photovoltaic element as its output. In this article we will look at the application fields and working principle of the EL817 optoisolator.

Applications of EL817 (S)(C)(TU)

The EL817(S)(C)(TU) optoisolator finds use in applications where maximum isolation between two sections of a circuit is of importance. For instance, in control systems where one section of the system is to be isolated from another, the EL817(S)(C)(TU) is an ideal choice. It also finds application in high-speed data acquisition systems to prevent data being corrupted due to noise interference. Furthermore, it is also used in applications such as signal buffering, switch protection, power supply conversion, and isolation protection circuits.

Working Principle of EL817 (S)(C)(TU)

The EL817(S)(C)(TU) optoisolator works on the principle of photocoupling. It consists of an infrared light emitting diode (LED), a phototransistor, a photovoltaic element, two resistors and a diode connected in series. The LED emits infrared light when the base of the phototransistor is energized, thus creating a photocurrent across the photovoltaic element. The photocurrent is then used to drive the phototransistor, the collector current of which is then amplified by the phototransistor. The amplified signal is then sent to the load, which is isolated from the input side.

The EL817(S)(C)(TU) also provides protection from spikes and surges. The two resistors and the diode connected in series acts as a clamp, limiting the maximum voltage applied to the optoisolator. This ensures that the optoisolator is not damaged by excess voltage.

In addition to providing electrical isolation, the EL817(S)(C)(TU) optoisolator provides a very fast response time which makes it ideal for high-speed applications. Furthermore, the optoisolator is very compact in size making it suitable for applications where space is at a premium.

Conclusion

In conclusion, the EL817(S)(C)(TU) optoisolator is an important tool used in a variety of applications to provide electrical isolation between two sections of circuits. It is suitable for high-speed applications due to its fast response time and also due to its compact size. Furthermore, it provides protection from spikes and surges, ensuring that the components are not damaged. The EL817(S)(C)(TU) optoisolator therefore finds use in many applications such as control systems, data acquisition systems, signal buffering, switch protection, power supply conversion, and isolation protection circuits.

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