K847PH

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The K847PH optoisolator combines the isolation of an optical barrier to separate electrical input and output signals with the switching speed of a transistor. An optoisolator, also known as an opto-coupler, opto-isolator or optical isolator, is a device used to transfer electrical signals between two isolated circuits while preventing high voltages, noise or surges from passing between them. The K847PH optoisolator is a Photovoltaic Output device which uses a photodiode to convert an incoming electrical signal into a digital output signal.

An optoisolator consists of a semiconductor LED mounted on a chip and surrounded by a hermetically sealed package which shields the LED from dust, air, and moisture. The K847PH optoisolator includes a photodiode and transformer coupled amplifier which senses and amplifies the photodiode\'s output current. The current then drives a transistor, which switches on or off in response to the electrical input signal and radiates an output voltage.

The K847PH application filed is widespread, ranging from industrial, consumer, automotive and medical applications. For instance, it is used to isolate a microcontroller from switching voltages and to provide switchable protection, as in engine control modules. It can sense light through a built-in optical sensor and control speed of an AC motor. It can also be used to switch AC or DC load from a microcontroller or as a switchable surge protection for semiconductors.

The working principle of the K847PH is based on a photodiode which converts incoming electrical signals into light. When light is received, a transistor is triggered which switches on or off depending on the input signal. The output voltage is then generated from a transformer-coupled amplifier. The isolation provided by the photodiode ensures that noise, surges, and other interference won\'t be passed along in the transmission.

The K847PH also features a high isolation voltage (V_iso) up to 3750V_rms (5kV peak). This provides a way to protect circuits from hazardous conditions which may be induced by using high voltage sources and helps to ensure the stability of the switching device. The operating temperature range of the K847PH is also very wide, ranging from -40°C to 105°C.

In summary, the K847PH optoisolator is a Photovoltaic Output device used in a wide range of applications which provides a clean signal transfer between two isolated circuits. It features a high isolation voltage up to 3750V_rms (5kV peak) and an extended operating temperature range, making it ideal for use in harsh conditions. The working principle is based on the photodiode which converts electrical signals into light which activates the transistor and generates the output voltage.

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