FOD817B3S

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Optoisolators - Transistor, Photovoltaic Output - FOD817B3S application field and working principle

Optoisolators are semiconductor devices that provide electrical isolation between two circuits. The FOD817B3S optoisolator is specifically designed for applications that require low power consumption and a narrow spectral response. Additionally, this optoisolator features a transistor output that provides a high degree of input-output isolation for sensitive circuits. These features make the FOD817B3S an ideal choice for a variety of applications, including: automotive lighting, medical equipment, telecommunications, and industrial process control.

The FOD817B3S optoisolator consists of two main elements: an LED and a photovoltaic output transistor. The LED is a light-emitting diode that generates the optical signal when driven by an electrical signal. The output transistor is then triggered by the light from the LED, allowing current to flow through it.

The device is typically used in digital circuits to physically isolate a control signal from a circuit that it controls. As the control signal is provided through the LED, the circuit being controlled only receives electrical current from the output transistor, thus providing complete electrical isolation. This isolation is important in applications where a high voltage is being supplied to the system, such as in industrial automation or medical equipment.

The FOD817B3S is a low power optoisolator with a narrow frequency response. The LED is designed to efficiently convert electrical signals into optical signals, with a response time as low as 500ns. Additionally, the LED spectral response is tailored to match specific wavelengths, resulting in a higher output power efficiency than other optoisolator devices.

The output transistor is designed to provide the necessary switching power to ensure that the circuit can be safely kept isolated. The transistor can provide a maximum collector current of 25mA and a maximum drain voltage of 16V. Additionally, the collector-base voltage provides a high degree of isolation, up to 10kV.

In summary, the FOD817B3S optoisolator can provide a reliable and low cost solution for applications that require electrical isolation. With its low power consumption and high isolation voltage, the FOD817B3S is an ideal choice for applications such as automotive lighting, medical equipment, telecommunications, and industrial process control.

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