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Optoisolators - Transistor, Photovoltaic Output

The MOC8100SR2VM is an optoisolator manufactured by CEL of Taiwan. It is a type of photocoupler, which is an electronic device that provides galvanic isolation between two circuits using a semiconductor light emitter and a photodetector. It is composed of an infrared LED, a phototransistor, two load resistors, a current limiting resistor and a few other components. It is commonly used in inter-board data transfer, high voltage power protection, and signal isolation.

Working Principle

The MOC8100SR2VM operates in a two-stage process. In the first stage, an electrical signal, such as a voltage or current, is applied to the input of the device. This signal is then converted into a light signal by the LED, called an optically coupled signal. This optically coupled signal is then sent through a barrier between the two circuits. In the second stage, the phototransistor converts the light signal back into an electrical signal, which is then sent to the output. This process is an advantage, as it isolates the two circuits, helping to ensure that any noise, electrical interference, or spikes in the input signal do not affect the output.

Applications

MOC8100SR2VM optoisolators can be used in a wide range of applications where electrical isolation is desired. It is often used to connect digital systems, such as microprocessors and microcontrollers, to analog signals, such as sensors or other analog circuits. It is also useful for protecting circuits from surges in power or from static electricity. Finally, it is useful for sharing digital signals between two or more circuits, creating a connection between them without direct physical contact.

MOC8100SR2VM is particularly suited for applications where there is limited surface space, as the device only consumes a small area. It also has low power consumption, allowing for extended battery life in mobile applications.

Conclusion

The MOC8100SR2VM optoisolator is a semiconductor-based device that provides electrical isolation between two circuits. It utilizes an LED to convert an electrical signal into a light signal, which is then transmitted across a barrier to a phototransistor, which converts the light signal back into an electrical signal. It is a popular choice for signal isolation and data transfer in a range of applications, particularly those which require a compact design and low power draw.

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