ELD211(TB)

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Optoisolators are semiconductor devices that provide electrical isolation between two circuits. The ELD211(TB) is a transistor output optoisolator that consists of a light emitting diode (LED) and transistor output element. An external connection is responsible for providing a current to the input LED, illuminating it and triggering the output transistor. Optoisolators provide electrical insulation up to thousands of volts of isolation, allowing signals to cross from one circuit to another without the fear of high voltage currents being transmitted back and forth.

The ELD211(TB) is a transistor output optoisolator with both common anode and common cathode configurations. The optoisolator has a very wide power supply range of 3.0 V DC to 32 V DC. It also requires an input current of 5 mA max for the LED and has a maximum collector base voltage of 32 V. It has a typical power dissipation of 100 mW and a typical ambient temperature range of −40 °C to +85 °C. The ELD211(TB) has a collector current rating of 100 mA and a nominal CTR of 20% at an input current of 5 mA and a minimum CTR of 6% at an input current of 6 mA.

The optoisolator is commonly used in power supplies, signal transmission and protection circuits, and sensor interfaces. It is primarily applied in switching applications and for interfacing digital signals across two electronic circuits or between two distinct logical levels. It has a low on-state resistance of only 60 ohms and high switching speed of 1.9 μs. It is highly resistant to environmental factors such as dust, moisture, and vibration. In addition, it has wide applications in harsh environments, such as in automotive and industrial. It also has very high insulation resistance of 5000 V between the input and output.

The way the ELD211(TB) optoisolator works is by using a photodiode as the main source of light. A current is applied to the LED element, which produces a light source that is directed onto the photodiode. The photodiode converts the light energy into electrical energy that is then used to turn on the output transistor. This causes a voltage drop across the output, triggering the circuit to perform a certain action. In this way, the isolator separates the input and the output elements and thus the information contained in the input signal is not transmitted to the output.

The ELD211(TB) optoisolator is highly reliable and provides isolation up to 5000 V, making it an ideal choice for a wide range of applications. It is capable of switching at high speeds of 1.9μs, making it suitable for power switching and other high performance applications. It offers high isolation resistance between its input and output and is resistant to dust, moisture, and vibration. The optoisolator is commonly used in signal transmission, power supply, and protection circuits, making it an ideal choice for a variety of industrial and automotive applications.

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