PC827

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Optoisolators are a type of circuit which uses light or radiation to provide electrical isolation between components. The use of optoisolators is often recommended in situations where two pieces of electrical equipment are required to be isolated from each other to prevent any kind of electrical interference. The PC827 optoisolator integrated circuit (IC) belongs to a category of optoisolators known as transistor-photovoltaic output. This type of optoisolator utilizes electromagnetic radiation such as visible light, infrared light or ultraviolet light to create a voltage potential between two output points, which can then be used to tell when an input voltage has been applied.

The PC827 optoisolator IC is an 8-pin DIP package which contains of a single transistor-photovoltaic output. It includes a gallium arsenide infrared LED (light emitting diode) and a photosensitive NPN transistor, along with two capacitors, an internal resistor, and a photodiode which provides a feedback loop to stabilize the current output. The optoisolator IC is rated for a peak output current of 50mA and a maximum voltage of 50V DC when on, and it can be operated in temperatures ranging from -40°C to +85°C.

The main advantage of the PC827 optoisolator IC is its ability to create an electrical isolation between two electronic devices, usually a low voltage logic circuit and a higher voltage power circuit. By transmitting signals between these two circuits in the form of light, it helps to prevent electrical spikes or surges from one circuit affecting the other. In addition, optoisolators can also be used in digital circuits to isolate noise which may be caused by the switching of transistors on and off.

The typical application of a PC827 optoisolator IC is to drive a power transistor switch from a low voltage logic circuit. A voltage is applied to the input of the optoisolator, which causes the LED to emit light which is received by the photosensitive transistor. This, in turn, causes the transistor to switch on the power switch, allowing current to flow from the power supply to the output of the optoisolator. This is a very simple method of switching power from low voltage to high voltage, while maintaining complete electrical isolation between the two circuits.

The working principle of the PC827 optoisolator IC is based on the effect of light on semiconductor materials. The light-sensitive transistor switches on when light is shone on it, allowing current to flow, and it switches off when the light is removed. This process is repeated over and over again, as current is driven through the transistor. The cycle is repeated as often as the input voltage is applied, creating a steady output voltage.

In summary, the PC827 optoisolator IC is a type of transistor-photovoltaic output optoisolator which utilizes light or radiation to provide electrical isolation between components. It is rated for a peak output current of 50mA and a maximum voltage of 50V DC when on, and it can be used to switch power from a low voltage logic circuit to a higher voltage power circuit. The PC827 optoisolator works by the effect of light on semiconductor materials, which causes the photosensitive transistor to switch on or off as the light is shone on it.

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