LTC4266AIUHF-4#PBF

LINEAR TECHNOLOGY  LTC4266AIUHF-4#PBF  芯片, 供电控制器, 四路, 90W, 1MHZ, 38QFN

The is a quad Power Sourcing Equipment PSE Controller capable of delivering up to 90W of LTPoE++ power to a compatible LTPoE++ powered device PD. A proprietary detection/classification scheme allows mutual identification between LTPoE++ PSE and LTPoE++ PD while remaining compatible and interoperable with existing type 1 13W and type 2 25.5W PDs. The LTC4266A feature set is a superset of the popular LTC4266. It features low RON external MOSFETs and 0.25R sense resistors which are especially important at the LTPoE++ current levels to maintain the lowest possible heat dissipation. An advanced power management features include, 14-bit current monitoring ADCs, DAC-programmable current limit and versatile quick shutdown of preselected ports. Advanced power management host software is available under a no-cost license. PD discovery uses a proprietary dual-mode 4-point detection mechanism ensuring excellent immunity from false PD detection.

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Four independent PSE channels

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Compliant with IEEE 802.3at type 1 and 2

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Low power dissipation

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Very high reliability 4-Point PD detection

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2-point Forced voltage

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2-point Forced current

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High capacitance legacy device detection

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Midspan backoff timer