HCNW136

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The HCNW136 is a transistor output optoisolator which provides electrical isolation between two circuits and can be found in a variety of applications. Designed to prevent voltage transient surges or spikes from one circuit interfering with another, optoisolators are used in a wide range of industries including industrial machinery, automotive, medical, and communication systems. This article explains the applications of the HCNW136 and what its working principles are.

Applications of HCNW136

The HCNW136 is typically used where a low voltage signal is isolated, for example, to protect an input signal that is coming from a low voltage sensor or a low-level microprocessor output. In medical applications, the optoisolator can be used to isolate drives or monitor control signals within a medical device, while in industrial applications the HCNW136 can be used to protect personnel from potentially harmful voltage surges. Additionally, for automotive applications, optoisolators can be used to provide the necessary electrical isolation between the engine control unit and the input/output signals.

Working Principles of HCNW136

The HCNW136 is an optoisolator that uses a photovoltaic output transistor to isolate electrical circuits from each other. The optoisolator consists of two components; an infrared LED and a photovoltaic output transistor. The LED is connected to one circuit, known as the input circuit, and the photovoltaic output transistor is linked to the output circuit.

The infrared LED is placed on the input circuit and when it receives a voltage, it will emit an infrared light beam. As the light beam passes through the air gap, it is picked up by the photovoltaic output transistor on the output circuit, which generates a voltage necessary to turn on the transistor. The electric current now flows through the output circuit and this in turn disconnects the electric current from the input circuit. This ensures that any transient surges or spikes on the input side of the optoisolator cannot affect the output side, thus protecting the equipment.

Conclusion

The HCNW136 Optoisolator is a popular choice for applications that require isolation between two circuits due to its compact size and high efficiency. The optoisolator uses a photovoltaic output transistor to provide electrical isolation between the two circuits, while its infrared LED allows the detection of voltage signals on the input side. As a result, the HCNW136 is suitable for a wide variety of applications, including medical, automotive, industrial machinery, and communication systems.

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