LTC4263IDE#PBF

LINEAR TECHNOLOGY  LTC4263IDE#PBF  芯片, 电源控制器, PSE, 110HZ, 48V, 14DFN

The is a 1-channel autonomous PSE Controller with internal switch for use in IEEE 802.3af® compliant power over Ethernet systems. It includes an on board power MOSFET, internal inrush, current limit and short-circuit control, IEEE 802.3af® compliant PD detection and classification circuitry and selectable AC or DC disconnect sensing. Onboard control algorithms provide complete IEEE 802.3af® compliant operation without the need of a microcontroller. The LTC4263 simplifies PSE implementation, needing only a single 48V supply and a small number of passive support components. Programmable on board power management circuitry permits multiple LTC4263s to allocate and share power in multi-port systems, allowing maximum utilization of the 48V power supply, all without the intervention of a host processor. The port current limit can be configured to automatically adjust to the detected PD class. Detection backoff timing is configurable for either Endpoint or Midspan operation.

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Fully autonomous operation without microcontroller

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Internal MOSFET with thermal protection

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Power management works across multiple ports with simple RC network

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Precision inrush control with internal sense resistor

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Powered device PD detection and classification

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AC and DC Disconnect sensing

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Robust short-circuit protection

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Pin-selectable detection backoff for Midspan PSEs

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Classification dependent ICUT current threshold

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LED Driver indicates port on and blinks status codes