FOD8153SD

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Optoisolators - Transistor, Photovoltaic Output

The FOD8153SD Transistor Photovoltaic Output Optoisolator is a 4-pin optoisolator. It is an all-in-one hybrid device consisting of a gallium arsenide LED, an integrated phototransistor, and an integrated output short-circuit protection circuit. The LED emits a light beam, when voltage is applied to its anode and cathode, and the phototransistor receives this light signal and activates the output transistor. The FOD8153SD optoisolator circuit provides electrical isolation between digital and analog circuits while maintaining high reliability.

Application Fields

FOD8153SD optoisolators are used for a wide variety of applications, including motor control, input/output circuitry, robot control, computer and instrumentation interface, and signal transmission. They are used in industrial, commercial, and automotive industries to protect EMC-sensitive circuits from electrical noise interference and supply voltage noise from electric generators. They are also suitable for low voltage and low-power applications, where protection against noise spikes is desired.

Working Principle

FOD8153SD optoisolators work by first generating a light signal from the LED when the input voltage is applied to its anode and cathode. This light signal is then received by the phototransistor, which activates the output transistor - connecting the output connection to the supply voltage and switching ‘on’ the load. The output short-circuit protection circuit is responsible for protecting the device from overloads. When the output current exceeds the current limit, the output protection circuit trips and blocks the output voltage, isolating the device from the power supply.

FOD8153SD optoisolators are great for a wide range of applications that require electrical isolation. They provide reliable protection against noise and ensure that devices are not damaged due to overloads or noise interference. With their high reliability, low voltage, and low-power applications, they are the perfect choice for protecting sensitive circuits.

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