VO615A-8

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Optoisolators – Transistor, Photovoltaic Output, incorporate a semiconductor light emitter optically coupled to a solid state photovoltaic detector to provide insulation between two electrically isolated circuits. The VO615A-8 optoisolator is a 4 pin 2-channel device widely used in industrial control applications. This paper will provide an insight on the application fields and working principles of this device.

The VO615A-8 is designed with two channels, each composed of a gallium arsenide infrared LED (emitter) and an integrated photovoltaic detector. The LED operation is activated by the emitter input located in the fourth pin, at a power supply voltage of 5V. The detected output is directed to the first and second pin through a collector or drain current. The third pin is used for grounding. Moreover, the maximum output current can be limited to 20mA, depending on the load.

The insulation properties and bandwidth provided by this device make it suitable for industrial and automotive applications. As a 4-pin device, it can act as a protective barrier in a variety of circuit systems, for instance it can be used as a conductor in motor and fan control applications. Similarly, the optoisolator is built for the protection of high voltage circuits up to 5000V. It is also often used in low-voltage systems such as in power distribution or telecommunication control circuits.

The VO615A-8 device utilizes the principle of optoelectronics, where it uses light to transfer electrical signals between two isolated circuits. This allows the two circuits to operate without a direct physical connection. The optoisolator acts as a switching device by converting an electrical signal into a light source. The light source is received by a photovoltaic detector, which then converts it into electronic signals.

The VO615A-8 optoisolator is able to detect very small signals, such as AC ripple or noise, due to its wide detection bandwidth. The wide bandwidth also ensures the stability of the signal over time, as any fluctuation is eliminated. Furthermore, the insulating layer between the LED and detector provides a strong barrier to any interference from outside signals. This allows the optoisolator to function as a true switch by providing separation between the input and output signals.

The MO615A-8 optoisolator is a reliable switch device suitable for a variety of industrial application fields, due to its wide bandwidth, insulation properties, and strong signal stability. The simplicity of the device also makes it an affordable and low-power alternative for the protection of high voltage circuits. Understanding the application field and working principles of the VO615A-8 will help engineers and technicians to make an informed decision when selecting a suitable component for their sensor and control systems.

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