CNY173W

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Optoisolators, also known as optical couplers or optocouplers, are compact semiconductor devices used to convey electricalsignals across large voltage differences and to transmit signals between electrically isolated circuits. The CNY173W is a type of optoisolator that utilizes an LED and phototransistor to accomplish this tasks. It is used in various applications such as voltage regulation and pulse-width modulation.

CNY173W

The CNY173W optoisolator provides constructional isolation between the LED and phototransistor, allowing it to act as an isolated voltage regulator.The CNY173W optoisolator was designed to provide isolation voltage of 5,000Vrms and an isolation resistance of 1GΩ or greater, making it ideal for applications in extreme environments. The optoisolator is also capable of operating at very low frequencies, allowing it to be used in applications such as pulse-width modulation.

Application Field and Working Principle

The CNY173W optoisolator is used in a variety of applications, including electrical isolation, voltage regulation, and pulse-width modulation. In electrical isolation applications, the optoisolator is used to ensure that voltage or current from one circuit does not affect a connected circuit. This is achieved by having the input circuit drive the LED and the output circuit detect the light from the LED. The output circuit is then isolated from the input circuit, thus providing electrical isolation.

The CNY173W can also be used for voltage regulation applications. In this context, the optoisolator operates as a voltage divider circuit, allowing the output voltage to be set to a specific level. The LED is connected to the input voltage, while the resistor is connected between the LED’s anode and the output voltage. By varying the resistive divider ratio, the desired output voltage can be set.

The CNY173W optoisolator is also used in pulse-width modulation applications. In this context, the optoisolator acts as a switched capacitor, allowing the circuit to switch between two different voltage levels. The LED is connected to the input voltage, while the phototransistor is connected between the output voltage and ground. By controlling the light intensity, the output voltage can be switched between two levels and thus, the pulse-width can be modulated.

The CNY173W optoisolator is a versatile device that can be used in a wide variety of applications. It is ideal for applications requiring electrical isolation, voltage regulation, and pulse-width modulation. This optoisolator provides a cost-effective solution for these applications while ensuring reliability and durability.

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