HCPL-2731#300

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The HCPL-2731#300 is an opto-isolator made by Avago Technologies. It is one of the many opto-isolators in the company’s ‘HCP’ line of products, and is a type of Transistor, Photovoltaic Output opto-isolator. In this article, we explain the general context in which its application fits and its working principle.

Application Field

Opto-isolators are commonly used in applications that require signal isolation for two independent sources. With the HCPL-2731#300, this isolation is achieved via a p-n junction Photo-Voltaic (PV) output. This device offers a typical coupling capacitance of 0.5pF in a single channel package which allows for high-speed devices used in high-speed signal isolations. Typical applications for the HCPL-2731#300 include:

• Power supply voltage monitoring
• Field device monitoring
• System power control
• Circuit protection
• Industrial automation
• Data acquisition systems
• Military & aerospace

Working Principle

The HCPL-2731#300 opto-isolator is a typical Transistor, Photovoltaic Output (TPO) opto-isolator. It consists of an integrated infrared LED and a p-n junction photocell, typically made out of silicon. When the LED – which is connected to the primary side – is powered by an external source, it emits an infrared light which is then detected by the photocell on the secondary side.

This signal is converted into a voltage proportional to the intensity of the incident light, and further amplified by an output buffer. This allows the signal to be sent over longer distances and with greater reliability compared to conventional opto-isolator devices. This makes the HCPL-2731#300 ideal for applications that require high speed signal isolation.

The HCPL-2731#300 features a wide dynamic range, making it suitable for a variety of applications. Its low on-state resistance and fast switching speed make it well suited for a wide range of applications. For example, it can be used in circuit protection by isolating a sensitive circuit from a potentially damaging external source. Furthermore, the HCPL-2731#300 can be used in industrial automation to isolate low voltage signals from hazardous high voltage sources.

The HCPL-2731#300 opto-isolator is a very reliable and versatile device that is suitable for many different types of applications. It is easy to set up and requires minimal maintenance. With its broad dynamic range and low on-state resistance, it is capable of providing reliable signal isolation in a wide range of environments. The HCPL-2731#300 is an ideal choice for applications that require a high speed, reliable signal isolation.

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