ILD252-X017T

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Optoisolators are an important type of power isolator. They allow for a safe power transfer between two components of a system without allowing for any kind of harmful back feed. The ILD252-X017T is a photovoltaic output transistor optoisolator that is particularly efficient for applications requiring a high operating voltage.

The ILD252-X017T parts package is an optoelectronic component package featuring an IC coupled with an LED, photo-transistor, or photo-diode housed to take into account both optical and electrical isolation from the environment. The Isolation voltage for the ILD252-X017T is 5 KV AC for 1 minute. Its darlington configuration provides an output current of 100mA with an on-state voltage drop of approximately 2.5V.

The ILD252-X017T functional principle is based on a pair of electrodes which contain separate high- and low-voltage power sources. The optical emanations from the LED must travel through the barrier between the two power sources before it reaches the photo-transistor as the active element. The transistor is attached to a current limiting resistor, in the form of a low-pass filter. The light voltage generated by this filter in combination with the base current through the transistor causes it to turn ON and OFF, thereby providing isolation for the two power sources. This behavior causes the voltage potential between the two power sources to vary, generating in effect an oscillating current between them.

The ILD252-X017T is typically used in industrial applications and is suitable for power distribution, lighting, switch actuation, and fault protection. It is also well-suited for use in PC board mounted solenoid or contactor-type systems, where high voltage is present in both the switch and the load. To extend the life of the ILD252-X017T, a snubbing switch can be added to dampen the arcing at the switching points. In addition, it can also be used in battery management applications to secure against reverse battery dangers.

The ILD252-X017T is an integrated circuit (IC) optoisolator that utilizes a photovoltaic effect to achieve an isolation distance greater than 5 kV, providing a secure power transfer between two components and less system noise than traditional wet-mechanical relays. This technology helps to ensure both safety and reliability for applications in industrial automation, motor/drive controls, and a wide range of other commercial and industrial applications.

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