HCPL-817-56LE

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Optoisolators or optical couplers, like HCPL-817-56LE, are designed to provide electrical isolation between two circuits by using an optical method of signal transmission. These devices are conventionally used in data communications networks, computer peripherals and industrial automation systems to transfer electrical signals with no direct electrical connection. Optoisolators come in a variety of forms, including Transistor, Photovoltaic Output (HCPL-817-56LE) and other solutions.

Transistor, Photovoltaic Output optoisolators, such as HCPL-817-56LE, employ the use of an optical output device coupled to a transistor input stage. The optical output device is usually a gallium arsenide infrared LED, which produces an invisible light beam when current is applied. This light beam is directed to the transistor input stage and activates or turns on the transistor when the light is detected.

Specifically, the HCPL-817-56LE optoisolator has a photovoltaic output transistor coupled with a gallium arsenide infrared LED. It has a forward voltage of 1.2V~2.2V and an isolation voltage rating of 5.8kVrms, which means it can block high voltage signals. This optoisolator has an operating current of 1mA and a switching rate of 1MHz. The power dissipation of the device is 1.2mW and it has a peak collector current rating of 10mA.

In general, optoisolators, such as HCPL-817-56LE, are used in a variety of applications. One of the most common uses is in electrical power systems to provide electrical isolation between primary and secondary circuits. This can be used to protect a system from high voltage spikes, protect against harmonic interference, and reduce electromagnetic interference. Optoisolators can also be used to protect data circuits from external noise and provide frequency sensing capability. Other applications include controlling motors, switching relays, alarms, and industrial temperature control.

To summarize, HCPL-817-56LE is a Transistor, Photovoltaic Output optoisolator. It has an isolation voltage rating of 5.8kVrms for blocking high voltage signals and an operating current of 1mA and a switching rate of 1MHz. This device is generally used in electrical power systems, data circuits, motor control, switching relays, alarms and industrial temperature control.

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