CNY172

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Optoisolators, also referred to as optocouplers, are crucial electronic components that provide electrical isolation and electrical noise dampening between two circuits. CNY172 is a particular type of optocoupler that operates using a Transistor, Photovoltaic Output (TPO). Discussed below is an overview of the CNY172 application fields and the working principle behind its Transistor, Photovoltaic Output type.

Application Fields

CNY172 optocouplers are mainly used in sensor circuits that have the requirement of electrical isolation and electrical noise dampening. The electrical isolation between input and output circuits is so robust that it works like an open circuit for any high frequency noise. Coupled with its low capacitance, the CNY172 is ideal for feedback circuits of converters. It has also been widely used in semiconductor circuits, microprocessor interface and control systems. In addition, CNY172 optocouplers are also suitable for applications such as linear stabilizers, alarm systems, servo motor systems, inverters, metering systems, and power supply systems.

Working Principle

The CNY172 optocoupler utilizes a bipolar junction transistor (BJT) to control the output between two isolated circuits. It is composed of two separate elements: the photovoltaic (PV) device and the BJT. The photovoltaic element, which is sensitive to light, is made up of a photo-sensitive resistor and a light-emitting diode (LED). The LED in the photovoltaic element is activated when a current is passed through it. This results in the emission of light which is then detected by the photovoltaic element. The photovoltaic element then converts this light into electric current, which is then passed through the BJT. The BJT is then responsible for providing the electrical isolation between the input and output circuits.

The working of CNY172 optocoupler is made possible thanks to the combination of the photovoltaic device and the BJT. The electrical isolation between the two circuits is achieved thanks to the BJT, which prevents any current from flowing through the circuit. On the other hand, the photovoltaic device acts as a bridge, allowing the current generated by the photovoltaic device to pass through the BJT without any interference. In this way, the CNY172 optocoupler is capable of providing robust electrical isolation and dampening high frequency noise.

Conclusion

The CNY172 optocoupler is a highly reliable and efficient electronic component for providing electrical isolation and noise dampening between two circuits. This optocoupler is mainly used in sensor circuits, semiconductor circuits, microprocessor interface, control systems, and power supply systems. Furthermore, in CNY172 optocouplers, a photovoltaic element is combined with a bipolar junction transistor to achieve electrical isolation between input and output circuits.

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