ELD217(TB)

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Optoisolators are devices utilized to transmit electric signals across two electrically isolated pathways while preventing physical contact between the two circuits. Transistor, Photovoltaic Output (ELD217(TB)) applications are specialized within this family of devices, offering various features that often make them well-suited for specific tasks. This article will provide an overview of the common applications and working principles for the ELD217(TB), enabling engineers to make a more informed decision when selecting the optimal device for their design.

Typical Applications

Transistor, Photovoltaic Output optoisolator applications are typically used in voltage detection for motor control, power supply monitoring, and industrial automation. The ELD217(TB) device is particularly advantageous when used for low-power, wide-band input and output signals.

ELD217(TB) Device Specifications

The ELD217(TB) device is a package of two optoisolators enclosed in a single housing unit. It features a photovoltaic output from a light-emitting diode (LED) and reverse bias photosensitive junction to form a small-signal transistor. With a peak forward current of 20mA, a peak voltage rating of 4V, and an peak reverse voltage of 32V, the ELD217(TB) is very versatile in many applications. Additionally, the package offers a dielectric strength of 2kV and an operational temperature range of -40°C to +85°C.

Working Principle

The ELD217(TB) applications operate on the principle of optoelectronics or optocoupling. This principle relies on the production and transfer of electric signals through the utilization of an LED light source and a light detector—in this case, a reverse bias photovoltaic diode. To begin, the LED generates a light signal. This signal is then detected by the reverse bias photovoltaic diode, which transfers the electric energy directly into the output transistor. This activation of the output transistor then produces the corresponding electronic signal.

This combination of input and output components creates a unique combination with versatile benefits, including: electrical isolation of the input and output circuits, improved electrical safety and reliability, and ability to handle digital as well as analog signals.

Conclusion

Transistor, Photovoltaic Output devices, such as the ELD217(TB), are widely utilized for a variety of applications. The package is extremely versatile, offering a peak voltage rating of 4V, peak forward current of 20mA, peak reverse voltage of 32V, dielectric strength of 2kV, and an operational temperature range of -40°C to +85°C. Additionally, it operates on the standard optoelectronics principle. As a result, engineers and designers can safely implement an ELD217(TB) device in virtually any application where electrical isolation is required.

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