PC818Y

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Optoisolators are electronic components used to electrically isolate a circuit or system to avoid electric shock or interference from high-voltage signals. The PC818Y is a four-pin transistor photovoltaic (TEPV) optoisolator from Vishay Semiconductor, which combines a high-efficiency infrared LED driving a high-speed photovoltaic transistor with a low power Darlington transistor.

TEPV optoisolators such as the PC818Y protect both the input and output circuits from overvoltage and noise. They offer excellent protection in systems with high voltage spikes or harsh electrical noise environments.

The PC818Y optoisolator combines a high speed IGBT and a photovoltaic isolation device in a single package. This makes it well suited for applications where there is a need for high speed and also a high level of isolation and protection. It is used in a wide variety of applications including automotive, industrial, home appliance, lighting, and consumer electronics.

The working principle of the PC818Y optoisolator is based on the photovoltaic principle, which states that the application of light to a semiconductor material will generate a voltage or current. The six-pin PC818Y includes an infrared LED, which converts current input (Iin) to light output. This light is received by the photovoltaic isolation device—integrated into the optoisolator—which then generates a voltage signal (Vout) in response. The voltage signal is then amplified by a Darlington transistor to further boost the voltage and current output. The output current (Iout) is then sent to the load.

The PC818Y optoisolator is a highly reliable, low-cost solution to optically couple an input signal to an output circuit. It offers high speed operation (up toing optically couple an input signal to an output circuit. It offers high speed operation (up to 1.8 megabits per second) with very low transmit power dissipation (250 mW). It is also highly resistant to noise, providing an impressive attenuation of more than 6 dBm. In addition, it offers excellent surge protection, protecting against both overvoltage and ESD strikes.

The PC818Y optoisolator is ideal for applications requiring robust isolation, such as automotive open/close sensors, factory automation systems, motor control systems, and home security systems. In addition, it is suitable for applications requiring wide supply voltage, including 5V, 9V, 12V and 24V systems.

In summary, the PC818Y optoisolator from Vishay Semiconductor is a four-pin transistor photovoltaic optoisolator with excellent isolation and protection characteristics. It offers highly reliable performance with high speed operation and exceptional protection against noise and high voltage spikes. Due to its robust construction and high level of protection, it is suitable for a wide variety of applications, including automotive, industrial, home appliance, lighting, and consumer electronics.

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