ILD74-X017T

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Optoisolators are such components that electrically isolate two circuits by using an optical device. It separates the input and output of two circuits, so as to prevent any current leakage between the two circuits. ILD74-X017T belongs to the Optoisolators - Transistor, Photovoltaic Output family, which offers excellent halogen free features that greatly reduce the component failure rate. This type of optoisolator has a photovoltaic (PV) output where the output voltage is proportional to the light intensity. In this paper, we will discuss the application and working principle of ILD74-X017T.

Application for ILD74-X017T

The ILD74-X017T optoisolator helps to provide isolation for a wide range of applications. It can be applied in low- and medium-power applications, such as voltage sensing, signal switching, level detection and lighting control. The isolation voltage of this component is 5300 VRMS, which is strong enough to provide isolation and disturbance free operation. Besides, with an insulation resistance of 105 MΩ @ 100 VDC, it ensures a high-level safety. Additionally, its low-temperature coefficient is able to support the operation in a harsh environment.

In medical applications, the ILD74-X017T is used for patient safety and personnel safety. For example, as the isolation barrier between the medical device and the human body, it ensures the safety of patient and medical personnel. As the isolation barrier between medical equipment and power cables, it protects the equipment from interference and power surges.

Working Principle

The ILD74-X017T contains two parts, the opto-coupler and the transistor. The opto-coupler is composed of an LED and a phototransistor. In normal operation, the LED is supplied with an input signal current, which is transmitted to the phototransistor, generating an output signal. The input current is regulated by a current limiting resistor, and the output voltage is proportional to the current passing through the LED. The transistor is the signal amplifier that amplifies the phototransistor’s output signal.

When the LED is off, no current flows through the opto-coupler, and the output voltage of the transistor (Vce) is approximately zero. When the LED is on, the output voltage of the transistor (Vce) is proportional to the forward voltage of the LED, and proportional to the amount of current through the LED. The transistor is also protected by an internal current limiting resistor, which ensures that the transistor never passes over a fixed current.

Conclusion

In conclusion, ILD74-X017T belongs to the opto-isolator - Transistor, Photovoltaic Output family, which is widely used in modern application. It can provide excellent insulation between two circuits, offering users a safe and reliable operation. Moreover, ILD74-X017T has a photovoltaic output, where the output voltage is proportional to the light intensity. This component also has a strong insulation resistance and a low-temperature coefficient, making it suitable for harsh operations. All these features make ILD74-X017T an ideal choice to achieve electrical isolation and safety in fields such as medical, lighting control and voltage sensing.

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