HCPL-354-00AE

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An optoisolator, also known as an opto-coupler, optical isolator or optical coupler, is an electronic component designed to provide electrical insulation between two parts of a system while symbols mechanically linking them. This device will allow a physical connection (photo-voltage) between the two sections, without any electrical connection. The HCPL-354-00AE optoisolator is part of the family of optoisolators which includes transistor, photovoltaic outputs.

HCPL-354-00AE is an optocoupler typically used in low frequency applications such as motor control, current sensing, over-voltage protection and resistance detection. This optocoupler contains a light-emitting diode (LED) and a phototransistor, optically linked with a common-mode rejection ratio (CMRR) of 250kV/µs minimum. The optocoupler is capable of supporting input voltage of up to 5.5V and has a minimum open-collector output current of 15mA. Its wide range of features make it ideal for many applications.

Regarding its application field, the HCPL-354-00AE optoisolator can be used in various industrial and consumer applications such as motor control, current sensor, digital signal transmission, embedded systems, PLC and harsh environment applications. Moreover, this optoisolator can be employed in automotive and medical applications, and static converters and programmable controllers where current and voltage levels must be monitored or limited and digital circuits need to be isolated.

The working principle of the HCPL-354-00AE optoisolator is based on the optical conduction of a light input signal through a light-emitting diode (LED), then converting it into an electrical output signal by a phototransistor equipped with an optical filter. The LED is connected to the input signal, while the phototransistor is connected to the output. Light emitted by the LED passes through the optical filter, impacting on the phototransistor, and generating an open-collector current output. This current is proportional to the LED current and to the input voltage. The whole circuit will provide electrical insulation between the input and output parts, as only a photo-voltage traverses the optical filter with no electric link between the two parts.

In summary, the HCPL-354-00AE optoisolator is a part of the optoisolator family, with transistor, photovoltaic outputs. It is mainly used in low-frequency applications such as motor control and signal transmission, as well as in automotive, medical and many other industrial and consumer applications. It works based on the optical conduction of a light input signal through a LED into an electrical output signal by a phototransistor, providing electrical insulation between the input and output parts via photo-voltage.

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