HCPL-5500

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Optoisolators are components used to provide electrical isolation, protecting sensitive circuits from excessive currents, voltages, and electromagnetic fields.The HCPL-5500 optoisolator is an integrated 5 pin device used in a variety of applications. It has a transistor, photovoltaic output coupled with an LED input that allow for signal transfer between two circuits with complete isolation.

Application Fields

HCPL-5500 optoisolators can be used in a wide range of applications. The optoisolator is the ideal choice for digital systems, PLC control circuits, or any other system where complete isolation is required. This optoisolator is very common in current, voltage and temperature measurement and control applications. It has a low profile package which helps to save space in applications where space is limited. Additionally, the HCPL-5500 is suitable for high-speed applications of up to 10 MHz.

Working Principle

The working principle of the HCPL-5500 is based on the use of a photovoltaic cell to transfer the signal from the device\'s LED input to the transistor output. This optoisolator consists of an infrared emitting diode, coupled to a silicon photovoltaic cell. When the diode is triggered, it emits infrared light which is collected by the photovoltaic cell. This emission of infrared light creates a current in the photovoltaic cell which is then used to switch the transistor output.

The transistor output of the HCPL-5500 is inverted, meaning that the output will be the opposite of the input. When the LED input is low, the transistor output is high, and when the LED input is high the transistor output is low. This inverted output is useful in many applications, allowing logic levels to be converted between two circuits with complete isolation. Additionally, this optoisolator has in-built protection, which ensures the device is not damaged by excessive currents.

Conclusion

The HCPL-5500 optoisolator is an integrated 5 pin device which provides complete electrical isolation. It is used in a variety of applications, for current, voltage and temperature measurement and control, and for high-speed applications of up to 10MHz. The HCPL-5500 is suitable for digital systems, PLC control circuits, or any other system where complete isolation is required. The working principle of this optoisolator is based on the use of an infrared emitting diode, coupled to a silicon photovoltaic cell, to transfer the signal from the device\'s LED input to the transistor output.

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