LTC4274AIUHF-1#PBF

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Active power over Ethernet, or PoE, is one of the most important advances in communication technology today. It provides reliable power delivery to devices over a single Ethernet cable, expanding the possibilities of data communication solutions. This technology is used in a wide variety of applications, including wireless access points, IP cameras, VoIP phones, and more. The LTC4274AIUHF-1#PBF is a high performance, cost-effective PoE controller from Linear Technology. It offers engineers a number of features and benefits, making it an ideal choice for PoE applications.

FEATURES of LTC4274AIUHF-1#PBF

The LTC4274AIUHF-1#PBF is a PoE controller that integrates several key features and functions. It is designed for both IEEE802.3af-2003 and IEEE802.3at-2009 compliant applications. It features a high efficiency buck-boost converter that can operate from both input and output voltage rails. This allows the controller to provide power at both the "endpoint" and the "modem" of the Ethernet cable. It also features a high efficiency, integrated FET switch, eliminating the need for an external transistor to control the output current.

The controller also features a control loop with programmable current limits. This allows the controller to optimize the output current for specific application requirements. The controller also includes integrated voltage, current and temperature sensing capabilities, allowing it to constantly monitor power consumption and output efficiency. This ensures that the LTC4274AIUHF-1#PBF will successfully deliver power in a wide range of application environments.

WORKING PRINCIPLE of LTC4274AIUHF-1#PBF

The LTC4274AIUHF-1#PBF is essentially a closed-loop converter. The converter is used to convert the power supplied from the power source to the power consumed by the load. The controller is divided into two sections, the primary and secondary sections. The primary section is responsible for sensing the input voltage and controlling the output current. The secondary section is responsible for monitoring the output current and controlling the output voltage.

The primary section of the converter consists of an input voltage sensing circuit and an output current control loop. The input voltage sensing circuit senses the input voltage and provides control signals to the converter control loop. The control loop is responsible for regulating the output current by adjusting the duty cycle of the power switch. The secondary section consists of an output voltage sensing circuit and a feedback loop. The output voltage sensing circuit senses the output voltage and provides feedback signals to the converter control loop.

The feedback loop is responsible for regulating the output voltage by adjusting the duty cycle of the power switch. The duty cycle of the power switch is adjusted based on the output voltage sensed by the output voltage sensing circuit. Thus, the converter is able to maintain a constant output voltage over a wide range of input voltage levels.

APPLICATION FIELD of LTC4274AIUHF-1#PBF

The LTC4274AIUHF-1#PBF is an ideal PoE controller for applications that require power delivery over Ethernet cable. The controller is designed for use in Ethernet Power over Ethernet (PoE) applications in accordance with IEEE802.3af-2003 and IEEE802.3at-2009. It is suitable for a wide range of PoE applications, including IP cameras, wireless access points, VoIP phones, and other Ethernet-powered devices. It is also the perfect solution for low-power, low-cost PoE systems.

The controller offers designers a highly efficient, cost-effective solution that meets the requirements of IEEE802.3af-2003 and IEEE802.3at-2009. Its integrated FET switch eliminates the need for an external transistor, while its programmable current limits offer flexibility and efficiency. Finally, its integrated voltage, current, and temperature sensing capabilities ensure reliable performance in a wide range of operating environments.

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