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Optoisolators - Logic Output

Optoisolators are components designed to transmit electrical signals between two different circuits while completely isolating them. They transfer the signal’s information, but no power, as the circuit is parallel. These components provide a high degree of protection for the equipment and personnel within the two circuits. The HCPL-5231#200 optoisolator is a logic output optoisolator designed for switching and digital signal applications.

HCPL-5231#200 Application Field

The HCPL-5231#200 optoisolator couples an LED to a photo-transistor. This photo-transistor has an output current in the range of 0.1mA to 20mA and the LED has a maximum response frequency of 30MHz. It is designed for low power and digital signal applications. Common applications for this optoisolator include high-speed optical communication systems, logic output systems, and switching circuits.

HCPL-5231#200 Working Principle

The working principle of the HCPL-5231#200 optoisolator is that it contains a LED and a photo-transistor. The LED is connected to the input side of the optoisolator and the photo-transistor is connected to the output side. When the input side of the optoisolator is energized, the LED emits light which is absorbed by the photo-transistor. This causes the photo-transistor to conduct electrical current, which switches the circuit on. This switch transfers the signal from the input side to the output side while maintaining electrical isolation between the two sides.

Conclusion

The HCPL-5231#200 optoisolator is a single logic output optoisolator designed for low power and digital signal applications. It provides a high degree of protection for the equipment and personnel within the two circuits. The optoisolator works on the principle of a LED and photo-transistor, which allows it to switch the circuits, and transfer the signal while maintaining electrical isolation.

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