LT4294IDD#PBF

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Introduction

Power over Ethernet (PoE) controllers are used to connect power to Ethernet networks and are a key component in Power-over-Ethernet (PoE) applications. The LT4294IDD#PBF is a PoE controller from Linear Technology that provides a broad range of features and functions to meet the requirements of the latest PoE standards.

LT4294IDD#PBF Application Field

The LT4294IDD#PBF is designed to meet the requirements of IEEE 802.3bt Type 3/4 applications. It is able to supply up to 100 watts of power with configurable current limits per port, allowing for the flexibile design of PoE interfaces. Additionally, the LT4294IDD#PBF is designed for Power Sourcing Equipment (PSE) applications and supports a broad range of PoE standards including the latest IEEE 802.3bt. It is designed to work with both Power over Ethernet Plus (PoE+) and Ultra PoE (UPOE) applications.

Due to its high-power capability, the LT4294IDD#PBF has proven effective in a variety of PoE applications, including IP surveillance cameras, access control systems, VoIP phones, and Wi-Fi access points. It is suitable for a variety of environments, including telecommunications, automotive, and consumer electronics.

LT4294IDD#PBF Working Principle

The LT4294IDD#PBF is a Dual-Port PoE controller that works in two major stages. In the first stage, the LT4294IDD#PBF detects the presence of a powered device and identifies the type of power required by the powered device. This is done by examining the configuration data sent by the powered device. If the configuration data matches one of the supported PoE standards, the LT4294IDD#PBF begins the second stage of operation.

In the second stage, the LT4294IDD#PBF provides the appropriate power levels to the powered device. The device supports both the IEEE 802.3bt Type 3/4 power levels, as well as legacy PoE and PoE+ standards, with configurable current limits. The device measures the power drawn by the powered device and regulates the output voltage in order to maintain a constant current level. The LT4294IDD#PBF also monitors temperature and power, ensuring safe operation and protecting against over-current faults.

Conclusion

The LT4294IDD#PBF from Linear Technology is a highly-effective dual-port PoE controller designed for use in the latest IEEE 802.3bt Type 3/4 applications. The device is able to provide up to 100 watts of power with configurable current limits, allowing for the flexible use of PoE interfaces. It supports a broad range of PoE standards, including legacy standards, and is suitable for a variety of different applications. The LT4294IDD#PBF operates by detecting the presence of a powered device, identifying the power needs, and providing the appropriate levels of power.

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