FOD8012AR2 Isolators

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Optoisolators are used to protect high-voltage systems from low-voltage systems. This is done by breaking the electrical pathway between the two with an insulating element. One example of an optoisolator is the FOD8012AR2. This device is used in applications that require logic inputs and outputs, and it is designed for a wide variety of industrial and automotive applications. In this article, we will discuss the application field and working principle of the FOD8012AR2.

Application Field

The FOD8012AR2 is a high-isolation optoisolator that is designed for use in automotive, consumer, industrial, and control applications. It is commonly used in automotive applications for input/output protection, process control, and drive circuitry. It is also commonly used in consumer and industrial applications to provide optical-coupled isolation between logic circuits, independent of the power supply voltage. It is also used in motor controllers, motion controllers, and control circuits. Due to its robust construction and high isolation voltage of up to 5.5 kV, the FOD8012AR2 is suitable for a variety of low-power applications, including computers, communication equipment, telecoms equipment, instrumentation, test and measurement equipment, audio equipment, and industrial control. The device is designed to meet safety regulations including UL60950-1, EN60950-1, and IEC60950-1.

Working Principle

The FOD8012AR2 operates on the principle of optical isolation. This means that the device uses light to create an electrical isolation barrier between the two circuits. A light-emitting diode (LED) is used as the input side and a phototransistor is used as the output side of the device. The LED emits light which is isolated from the other circuit and absorbed by the phototransistor. The phototransistor output is then amplified and used to switch the desired device. The device contains two channels which have independent light source and sensor. The output transistor is designed to be capable of sinking or sourcing up to 10mA of current and can be used to drive low current loads such as LEDs or small relays. The device utilizes a 6.3V zener diode to reduce Relay Dielectric Strength (RDS) and improve transfer characteristics.

Conclusion

The FOD8012AR2 is an optoisolator device designed for a variety of low power applications. It is designed to provide high-isolation between logic circuits to protect against accidental or deliberate voltage changes. It has two isolated channels and is suitable for driving small relays or LEDs. Its 6.3V zener diode reduces RDS and improves transfer characteristics, making it suitable for a variety of automotive, consumer, industrial, and control applications.

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