HCPL-817-00AE

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Optoisolators, also known as optocouplers and photocouplers, are electronic components that use light to isolate two electrical circuits. The HCPL-817-00AE optocoupler is one of these devices and is used in a wide variety of applications. In this article, we will discuss the HCPL-817-00AE\'s application field and working principle.

The HCPL-817-00AE is a transistor output optocoupler with an integrated high efficiency red LED light source and Photovoltaic output. It provides a high degree of isolation between input and output, and meets isolation requirements across a wide range of applications. The HCPL-817-00AE features a high speed response (typical rise and fall times of 6 us to 30 us). It has excellent CMR immunity (Common Mode Rejection), low saturation output voltage (Io  5 mA), 3 kV peak isolation voltage, and an operating temperature range from -40°C to +85°C.

The HCPL-817-00AE is primarily used in power supply protection, motor controls, instrumentation, and a variety of other industrial and consumer applications. It enables the user to control the output of an electrical circuit without direct connection between the input and output, providing for safer operation, higher reliability, and reduced system costs.

The working principle behind the HCPL-817-00AE involves two components. First, an input phototransistor converts the input signal into an electrical current. The phototransistor is an NPN type transistor with an integrated light source capable of emitting light in response to an electrical signal. This light is directed onto the photovoltaic output, typically a photodiode such as a silicon PN diode, which converts the light energy into an electrical signal. This signal is then used to control the output voltage.

To ensure maximum performance, the input phototransistor and the photovoltaic output need to be aligned correctly. The proper alignment ensures that the light from the input phototransistor reaches the output Photodiode at the right intensity. To ensure proper alignment, the HCPL-817-00AE is designed with an integrated window between the input Phototransistor and output Photodiode.

The HCPL-817-00AE is a highly reliable optocoupler, designed for use in a variety of industrial and consumer applications. It offers excellent CMR immunity, highspeed response, and a wide operating temperature range. With its integrated windowed design, it also ensures proper alignment of the input phototransistor and the photovoltaic output for maximum performance.

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