CNY171S

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Optoisolators - Transistor, Photovoltaic Output

The CNY171S is a type of optical isolator or opto-isolator device which uses a combination of electrical and optical isolation techniques to provide electrical isolation between different parts of the circuit. It is a photo transistor-based opto-isolator with photovoltaic output. The CNY171S is an effective way to isolate input and output of a circuit, in order to prevent short circuits or feedback, and it also helps to protect high-impedance circuitry from damage due to current overloads.

Application fields

The CNY171S has a wide range of applications. It can be used in telecommunications, automotive, industrial control, and medical equipment, as well as in consumer electronics. It is often used as an interface between a microcontroller and an external device, such as a motor or relays. It can also be used in data transmission, in which the CNY171S is used to isolate the data from the power source. It can also be used to provide electrical isolation between different components in a circuit, such as between a power source and the load.

Working principle

The CNY171S consists of three parts: the phototransistor, the photocell and the LED. The photocell detects light from the LED and generates a small electrical current. This current is then amplified by the phototransistor, which provides the output signal. The LED is powered by an external voltage source, such as a battery or a DC power supply. When the input is activated, the LED emits light which is detected by the photocell. The current generated by the photocell is then amplified by the phototransistor, which provides the output signal.

The CNY171S is particularly useful in applications where isolation is required, such as to protect high-impedance circuits from overloads, or to provide electrical isolation between two systems when data transmission is required. The CNY171S has a low power consumption and is able to handle switch closure resistances up to 65Ω.

Conclusion

The CNY171S is a versatile photo-transistor opto-isolator with photovoltaic output. It is used in a variety of applications to provide electrical and optical isolation between different subsystems, such as between a microcontroller and an external device or when data transmission is required. It has a low power consumption and can handle switch closure resistances up to 65Ω.

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