CNY172FVM

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Optoisolators are electronic components that provide a physical connection between two or more electrical signals without the risk of the interconnected mediums crossing over and damaging the system. The CNY172FVM, or 4-Pin Phototransistor Output Optocoupler, is an example of a transistor-output optoisolator that can be used to protect circuits from interference or damage. This article will discuss the application fields of the CNY172FVM and its working principle.

The CNY172FVM is a type of optoisolator used to provide physical isolation for a single input/output line. It is commonly used in power supplies, audio systems, automotive applications and other applications where interference between two or more systems is present or where risk of electrical ground-loops could cause damage. It works by using a 4-pin phototransistor mounted in series with a resistive element. When the phototransistor conducts, the output is pulled low, isolating the input from any external interference.

The CNY172FVM optoisolator consists of a 4-pin phototransistor, a resistive element and a protective coating. Its operating voltage range is from 4V to 30V in AC and DC. It has a oscillation frequency of 4.5MHz and a reactance of 5Ω. The phototransistor has a dark current of 10μA max, and the LED component has a typical junction temperature of 40K. The phototransistor can handle a forward diode current up to 20mA and output power dissipation of 500mW at ambient temperature. Finally, it has a response time of 5μs and a peak wavelength of 810nm.

The CNY172FVM essentially works by controlling the flow of current from the input to the output. Its input is normally closed and only opened when triggered by an external voltage. The phototransistor is constructed in a series between the input and the output, so that when the current passes through the phototransistor, it is blocked and the output remains low. At the same time, the LED component of the optoisolator is emitting light which is used to close the path, allowing the current to flow and activate the output signal. The resistive element prevents any voltage overshoot or transients from affecting the circuit.

In applications where ground loops are present or where interference between signals is a risk, the CNY172FVM can be used to provide a safe and secure physical isolation for a single input/output line. It can also be used in automotive applications as a safeguard against any power voltage spikes, and in audio systems and power supplies as a way to protect the circuit from environmental noise. Furthermore, its low power consumption and fast response time make it suitable for many applications.

In summary, the CNY172FVM is a 4-pin phototransistor output optocoupler used to provide physical isolation for a single input/output line. Its low power consumption and fast response time make it suitable for many applications, including those where interference between two or more signals is present or where ground loops could cause damage to the circuit. The phototransistor it uses to control the flow of current from the input to the output has a dark current of 10μA max, while the LED component has an operating voltage range of 4V to 30V in AC and DC with a peak wavelength of 810nm.

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