EL2630-V

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Optoisolators are transistor outputs designed to separate input and output circuits. They typically incorporate a LED or other optical source, a photosensitive element (phototransistor, photodiode, or photoSCR), and amplifying circuitry. The EL2630-V is one example of an optoisolator with a transistor output. This application note outlines its field of application and its working principle.

EL2630-V Application Field

The EL2630-V optoisolator is designed for low to medium speed logic isolation in industrial control systems. It is typically used in applications such as power line isolation, integrated-circuit isolation, and color-coded encoder-decoder systems. It also can be used to isolate logic signals from logic families such as TTL, CMOS, LVTTL, and ECL.

The EL2630-V optoisolator’s form factor is well-suited for applications where board space is at a premium. Its small size is also ideal for printed circuit board layout, allowing it to fit into areas that normally would require two or three standard optoisolators. It is also UL/IEC recognized and tested for safety.

EL2630-V Working Principle

The EL2630-V optoisolator works through its combination of phototransistor, optical coupler, and amplifier. In the simplest configurations, optical energy is constantly transmitted from the LED side of the EL2630-V optoisolator to the photosensitive side. The photosensitive element inside the optoisolator then absorbs the light energy and converts it to electrical energy.

The EL2630-V optoisolator also contains a device specific amplifier. This amplifier can be used to increase the output of the optoisolator, or to provide additional features such as a current limiter. Other features of the EL2630-V optoisolator include a wide input voltage range of 3V to 36V, a maximum operating current of 10mA, a short-circuit protection feature, and a low-power consumption of 4mW. Ultimately, this combination of features makes the EL2630-V optoisolator well-suited for low-voltage logic isolation applications.

Conclusion

The EL2630-V optoisolator is designed for low to medium speed logic isolation in industrial control systems. Its small form factor and low power consumption makes it well-suited for printed circuit board layout where space is at a premium. Inside the EL2630-V optoisolator there is a combination of phototransistor, optical coupler, and amplifier. Through this combination, optical energy is constantly transmitted from the LED side of the optoisolator to the photosensitive side, which is then converted into electrical energy. Ultimately, the EL2630-V optoisolator is a cost-effective and reliable solution for applications requiring low-voltage logic isolation.

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