Power Over Ethernet (POE) Controller, 57 V/1.1 mA, 1 MHz Interface, 25V UVLO Threshold, QFN-38

LTC4274AIUHF-4#PBF - Power Over Ethernet (POE) Controller, 57 V/1.1 mA, 1 MHz Interface, 25V UVLO Threshold, QFN-38

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Product Overview

The LTC4274AIUHF-4#PBF is a single 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 a LTPoE++ PSE and LTPoE++ PD while remaining compatible and interoperable with existing type 1 (13W) and type 2 (25.5W) PDs. The LTC4274A feature set is a superset of the popular LTC4274. This PSE controller 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. This power management features include: a 14-bit current monitoring ADC, DAC-programmable current limit and versatile quick port shutdown. PD Discovery uses a proprietary dual-mode 4-point detection mechanism ensuring excellent immunity from false PD detection. The LTC4274A includes an I²C serial interface operable up to 1MHz.
  • Low power dissipation
  • 0.25R Sense resistance per channel
  • Very high reliability 4-Point PD detection
  • 2-point Forced voltage
  • 2-point Forced current
  • High capacitance legacy device detection
  • Midspan backoff timer
  • Supports 2-pair and 4-pair output power


Power Management, Communications & Networking, Automation & Process Control

Product Information

MSL 1 - Unlimited
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