HCPL-4504#300

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Optoisolators, also known as opto-couplers or optical-isolators, are used mainly for electrical isolation between different circuits. The HCPL-4504#300 is a series of optoisolators that includes transistor, photovoltaic output optoisolators with high speed response times, high CMR and low output saturation voltage. It has the highest common mode transient immunity offered by Avago Technologies.

The HCPL-4504#300 optoisolator series consists of devices with a photodiode, LED as emitter and an open collector transistor as output. The photodiode connected in series with the LED causes the LED to turn on when there is current flowing in the loop. When the LED turns on, it radiates light onto the base of the NPN output transistor causing it to turn on, thus closing the circuit.

The applications of the HCPL-4504#300 optoisolators range from motor control, automotive applications, industrial control, robotics, medical equipment, measuring equipment, power tools and many more. It can prevent voltage surges, EMI and RFI. Furthermore it can be used for data connection of two on/off data sources with protection of up to 2500 Vrms across the isolation barrier for up to one minute duration.

The working principle of the HCPL-4504#300 optoisolators is based on the “photovoltaic effect”. In this effect, light striking a semiconductor junction generates a voltage potential across the junction. This creates a current flow in an external circuit which is connected across the junction. This current flow then in turn actuates an output device such as a relay. This process is known as opto-coupling.

The HCPL-4504#300 optoisolator series is designed for high speed, which is defined as the transition time of a device’s response to an input signal. The speed of the response can be determined from the data sheet of the device. These optoisolators use photo-sensitive silicon photodiodes that generates voltage upon the illumination. Additionally, the optoisolator uses an LED which casts light to the photodiodes when a current is drawn through it. This helps the switch to make quick and sensitive changes at very low input power.

Moreover, the HCPL-4504#300 optoisolators have several other performance characteristic advantages over other optoisolators. It has high common mode transient immunity which is up to 20kV/µs, high common mode rejection (CMR) up to 60dB, low output saturation voltage and wide operating temperature range from -55ºC to +125ºC. Such performance features makes the HCPL-4504#300 an ideal optoisolator for many applications.

In conclusion, the HCPL-4504#300 optoisolator series is widely used in a variety of applications due to its high speed response time, high common mode rejection and wide operating temperature range. It has excellent performance characteristics which make it the ideal choice for many applications.

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