LT4276CIUFD#PBF

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The LT4276CIUFD#PBF is a power management integrated circuits (PMIC) which appears in many electronics designs today. It is a family of Power Over Ethernet (PoE) Controllers, offering a wide range of features for a wide range of applications. This article will explain the application field and working principle of the LT4276CIUFD#PBF.

What is a Power Over Ethernet (PoE) Controller?

A Power Over Ethernet (PoE) Controller is a device that is used to provide power to devices over Ethernet cables. PoE is the term used to describe the process of delivering power to networked devices over the Ethernet cables that typically carry data. The main benefit of PoE is that it eliminates the need for dedicated power supplies for networked devices, as the power can be delivered over the same cables as the data.

Application field of LT4276CIUFD#PBF

Because of its wide range of features, the LT4276CIUFD#PBF is suitable for a wide range of applications. It is commonly used in systems that require the ability to power and control multiple power domains. This can include networking, industrial and automotive applications, where the number of power supplies may be limited and the need for efficient power handling is important.

The LT4276CIUFD#PBF is designed to deliver up to 28.5W of power over a single Ethernet cable, making it suitable for powering a wide range of devices. Furthermore, it supports a variety of inputs, such as USB and DC, which allows it to be integrated into an even wider range of applications.

Working Principle of LT4276CIUFD#PBF

The LT4276CIUFD#PBF is designed to provide reliable and efficient power over an Ethernet connection. It is capable of negotiating between different power sources to decide which is most suitable for powering the connected device. This is done by using a technique called Power-Negotiation Pulsing.

Power-Negotiation Pulsing is a technique used by PoE controllers to identify the availability of power. It works by sending a series of low-resistance pulses across the cable. The device will detect this pulse, and then attempt to negotiate with the power source to decide if it can get the necessary power from the source.

Once the negotiation is successful, the controller will send a confirmatory signal back to the power source. This is known as Power-Signaling. The power source then has confirmation that the power will be available and can begin providing the power to the device.

Conclusion

The LT4276CIUFD#PBF is a Power Over Ethernet (PoE) Controller, specifically designed to provide reliable and efficient power over an Ethernet connection. It is suitable for a wide range of applications, providing up to 28.5W of power over a single Ethernet cable. It also uses a technique called Power-Negotiation Pulsing for sending and receiving power-negotiation signals.

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