LTC4257CDD#PBF

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Power Over Ethernet (PoE) Controllers are the intelli gent and cost- effective solutions to provide power across a network. The LTC4257CDD#PBF is a PoE controller IC from Linear Technology, featuring low power consumption, low quiescent current, and a wide range of operating voltages that make it ideal for remote and/or RF-based applications.

The LTC4257CDD#PBF provides up to 4.6 A of continuous output current, features a Dynamic Power Management System (DPMS), and supports Power Source Equipment (PSE) and Power Device Equipment (PDE) applications. It also includes a built-in Thermal Shut Down system to protect the IC from over temperature conditions.

This IC consists of a low power start up circuit, a phase shift oscillator, and a low voltage disconnect circuit. The start up circuit provides a low voltage output which can be used to supply the bias voltage for the PSE and PDE applications. The phase shift oscillator is designed to convert the DC supply voltage into a high frequency voltage pulse, which is then used to power the PSE and PDE applications. The low voltage disconnect circuit ensures that the PSE or PDE application is shut down when the output voltage drops below a predetermined level. Finally, the Thermal Shut Down feature allows the IC to shut itself down if the temperature of the IC rises above a predetermined threshold.

The main features of the LTC4257CDD#PBF make it an ideal solution for applications such as Lighting, Security, Automation, Medical, and Industrial applications that require Power over Ethernet. Its wide operating voltage range and high current output characteristics make it an excellent choice for both DC-DC and AC-DC applications. Additionally, the thermal protection and low power consumption features make the IC suitable for applications with restricted power budgets.

The LTC4257CDD#PBF is an ideal solution for powering remote control and switch-mode PoE applications. Its small size and low power consumption make it well-suited for applications in harsh environments. Furthermore, its wide operating voltage range and adjustable output current ranges provide flexibility and longer life spans.

Overall, the LTC4257CDD#PBF is an ideal solution for high reliability and efficiency Power over Ethernet applications. With its low power consumption, wide operating voltages, and adjustable current output features, the LTC4257CDD#PBF is an excellent choice for PoE controllers in remote and/or RF-based applications requiring Power over Ethernet.

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