FOD8523S

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The FOD8523S optoisolator is a transistor output, photovoltaic optoisolator made from GaAs infrared source and a N-channel enhancement-mode MOSFET for photo-coupling applications. This device allows for current isolation between input and output potential, providing electrical insulation and protection from various hazards in the circuit.

The FOD8523S optoisolator has several advantages such as wide operating temperature range (-40oC to +85oC), high isolation voltage (2500V rms), low forward voltage drop (1.2V typ), and low capacitance (20pF max). It is also designed with a high response rate (100kHz typ) and a wide forward current range (5mA~30mA). The FOD8523S optoisolator is UL recognized, making it an excellent choice for safety and reliability in your circuit.

The application field of the FOD8523S optoisolator can range from isolated power controllers, audio circuit protection, logic isolators, and LCDs and LED controlling to level shifting and isolation amplifiers. For LCDs and LED applications, this device can be used to provide feedback to the circuit, thereby eliminating any direct connection to the LED. The FOD8523S also provides excellent noise immunity, making it the ideal choice for level shifting and isolation amplifiers.

The FOD8523S optoisolator works through its internal circuitry and its basic connection pattern. The two control elements are the LED and the MOSFET. The FOD8523S optoisolator is a common source output, meaning the LED will control the MOSFET which acts as the output device. This connection provides an isolated point in the diagram, allowing the LED to be electrically insulated from the environment, protecting the circuit from any external EM field interference.

The FOD8523S optoisolator works with light photons being emitted from the LED, entering the device and striking the photodetector. This causes a change in carrier distribution across the junction and the photodetector’s p-n junction voltage, resulting in an output from the device. The output from the device will be dependent on the amount of current applied to the LED when it is activated. The MOSFET will then act as the output device and the output current will be determined by the voltage across the p-n junction.

In summary, the FOD8523S is an ideal choice for Transistor, Photovoltaic Output optoisolator applications. It offers a wide range of features such as wide operating temperature, high isolation voltage, low forward voltage drop, and low capacitance. Additionally, it provides excellent noise immunity and is UL recognized. The FOD8523S optoisolator is a great choice for isolated power controllers, logic isolators, level shifting, and isolation amplifiers.

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