PS2806-4

Optoisolators - Transistor, Photovoltaic Output

PS2806-4 is a type of optoisolator which combines a GaAIAs infrared light-emitting diode (LED) and a photovoltaic detector into a single device. The leadframe also includes a built-in output transistor which is designed to be optically coupled with the LED.

Optoisolators are widely used to isolate analog and digital signals and provide electrical isolation between two circuits. They are also used to protect circuitry in applications involving power ranging from low voltage to high voltage. This article examines the application fields and working principles of the PS2806-4.

Application Fields

The PS2806-4 optoisolator is suitable for a wide range of applications. It is used in computer-controlled systems, digital electronic systems, detecting circuits, and monitoring systems in consumer and industrial electronics. It can also be used in home automation systems for controlling lights, garage doors and other appliances.

The device is used in a variety of automotive systems such as engine control, vehicle security, emissions control, and braking systems. In medical equipments, the PS2806-4 is used in hospital and laboratory equipments, radiation detectors, and patient monitoring systems.

The device is also used in telecommunications and communication systems, including digital communication systems, optical communication systems, and high-speed data transmission lines.

Working Principles

The PS2806-4 optoisolator is composed of a phototransistor and a photodiode. Photons emitted from the LED are absorbed by photodiode and converted to electricity which is then amplified by the transistor. The current generated by the phototransistor is proportional to the current of the LED.

The PS2806-4 optoisolator is designed with an integrated LED and phototransistor, which enables it to work in conditions where space saving is a major requirement. It includes integrated EMC protection, which helps in ensuring better protection against electronic interference.

The LED and photodiode are electrically isolated from the input and output, which eliminates cross talk and provides electrical isolation between circuits. The optoisolator also provides noise immunity in applications subjected to strong electrical and magnetic fields.

The high current gain of the optoisolator makes it suitable for use in high-speed data transmission systems. The high switching speed and high EMI immunity makes it ideal for automotive applications. The PS2806-4 optoisolator is capable of switching 10mA current at a speed of 800KHz.

Conclusion

The PS2806-4 optoisolator is a versatile device suitable for a wide range of applications. It provides excellent sound, electrical, and magnetic interference immunity. It also offers a high current gain which makes it suitable for high-speed data transmission systems. The device is easily integrated into a system and provides high reliability in a range of applications.