PS9351L-AX

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Optoisolators are a type of electrical components which are used to provide electrical isolation between two circuits. Logic Output optoisolators are used to isolate two asynchronous digital signals. The PS9351L-AX is a Logic Output optoisolator which is used for power supply monitoring or protection systems, high voltage isolation, and digital switching applications. This article will discuss the application fields and working principle of the PS9351L-AX.

Application Fields:
The PS9351L-AX is a Logic Output type optoisolator which has a built-in AC/DC converter. This makes it suitable for applications which require the isolation of two digital signals without the need to use a separate power supply. It is mainly used in applications where there is a need to provide electrical isolation between two asynchronous digital signals, such as motor control, power supply monitoring or protection systems, digital switching, and high voltage isolation.

The PS9351L-AXs advantages are that it is small in size (only 7.5 mm × 7.5 mm, including its pins), has a wide power supply range (2.5 ~ 28V), and has a high common mode transient immunity (CMTI) of at least 40 kV/μs. These features make it suitable for applications where miniaturization and reliable performance are required.

Working Principle:
The PS9351L-AX is a Logic Output type optoisolator, which provides electrical isolation between two circuits. It consists of an LED, a phototransistor, and a bias resistor connected in series. The LED emits light when power is applied to it. The light is then received by the phototransistor, which in turn activates the output signal from the optoisolator.

The output of the PS9351L-AX is triggered when the LED current is sufficient to activate the phototransistor. This current is determined by the bias resistor, which has a resistance of 500KΩ. When the LED current includes a sufficient amount of ultraviolet light, the phototransistor is activated and the output signal is triggered. The range of resistance of the bias resistor can be adjusted from 100KΩ to 500KΩ, allowing the user to adjust the output voltage threshold of the optoisolator.

The input voltage range for the PS9351L-AX is 2.5 ~ 28V. When the input voltage is higher than 18V, a Zener diode is used to prevent overvoltage damage to the optoisolator. The maximum operating voltage of the optoisolator is 25V.

The PS9351L-AX has a minimum operating temperature of -40 °C and a maximum operating temperature of 85 °C. It is RoHS compliant and leads free. The optoisolator has a high common mode transient immunity (CMTI) of at least 40kV/μs, which is higher than that of most optoisolators. This makes it suitable for applications which require reliable performance and miniaturization.

The PS9351L-AX has a rapid response time, making it ideal for applications which require fast response times. It can be used in a wide variety of applications, such as power supply monitoring or protection systems, high voltage isolation, and digital switching.

In summary, the PS9351L-AX is a Logic Output type optoisolator which is used for applications which require electric isolation between two asynchronous digital signals. It is small in size, has a wide power supply range, and has a high common mode transient immunity (CMTI), making it suitable for applications which require miniaturization and reliable performance. Furthermore, it has a rapid response time and can be used in a variety of applications.

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