4N47U

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Optoisolators are devices used to transfer electrical signals and power between two isolated circuits. They allow for secure communication between circuits while also providing electrical insulation. The 4N47U optoisolator is a Transistor Photovoltaic Output optoisolator, meaning it is used to provide electrical insulation and isolation between an input device such as a microcontroller and an output device such as an LED. This optoisolator consists of an infrared diode emitter, a light detector such as a phototransistor, and a transistor driver circuit.

The 4N47U optoisolator is mainly used in applications that require high electrical isolation. This makes it useful in motor control applications, isolated power supplies, switch mode power supplies, and automated test system applications. It is also used in laser-based sensing applications such as optical switches and encoders for robotic systems. The 4N47U optoisolator is capable of providing an isolation voltage of 7700V (RMS) for 1 minute.

The 4N47U optoisolator works by allowing light to pass through from the input side to the output side. The light detector (phototransistor) signals the transistor driver circuit which amplifies the signal to allow for current or voltage in the output side. This allows for electrical isolation between the input and output side, ensuring safe communication.

The 4N47U optoisolator usually comes in a 6-pin DIP or SMD package. It has a wide operating temperature range of -40 to 85C and includes a built-in voltage protection. It has a forward current of 10mA and a maximum output current of 100mA. It also features a fast response time of 4.5uS.

Overall, the 4N47U optoisolator is an effective and versatile device used to provide electrical isolation and secure communication between circuits. It is easy to use and is relatively inexpensive. It is suitable for many different applications, such as motor control, automated test systems, and optical switches, and provides high electrical isolation of 7700V (RMS) for 1 minute.

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