LTC4263CDE-1#PBF

LINEAR TECHNOLOGY  LTC4263CDE-1#PBF  芯片, 电源控制器, PSE, 110HZ, 48V, 14DFN

The is a high power single PSE Controller for use in power over Ethernet systems. The internal current limit and short-circuit protection are designed to provide up to 30W of PSE output power for power hungry PoE applications such as WAPs, security cameras and RFID readers. The LTC4263-1 includes IEEE 802.3af® compliant PD detection circuitry along with selectable AC and DC disconnect sensing, allowing seamless operation in conventional IEEE 802.3af® systems as well as propriety, high power applications. The LTC4263-1 simplifies PSE implementation, needing only a single supply and a small number of passive support components. Onboard control algorithms provide complete PSE functionality without the need of a microcontroller and built-in foldback and thermal shutdown provide comprehensive fault protection. An LED pin indicates the state of the port and detection backoff timing is configurable for either endpoint or midspan operation.

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Fully autonomous operation without a microcontroller

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Internal MOSFET with thermal protection

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Precision inrush control with internal sense resistor

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Forced current PD detection for noise immunity

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AC and DC Disconnect sensing

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Legacy PD detection

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Robust short-circuit protection

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Pin-selectable detection backoff for Midspan PSEs

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LED Driver indicates port on and blinks status codes