The MAX5984 is a single-port, power-sourcing equipment (PSE) power controller designed for IEEE® 802.3af/at-compliant PSEs. The device provides detection, classification, current limiting, and DC/AC open-load detection of powered devices (PDs). The MAX5984 operates in an autonomous mode, requiring no software programming, and integrates power MOSFETs and current-sense resistors. The device supports the next-generation 5-level, 2-event classification for detecting high-power PDs. The MAX5984 delivers up to 40W of power to a single port (5-level enabled) and provides high-capacitance detection for legacy PDs. The MAX5984 features input undervoltage lockout (UVLO), input overvoltage lockout, high-temperature detection, output slew-rate limiting during startup, and LED status indication. The MAX5984 is available in a space-saving 28-pin TQFN (5mm x 5mm) power package and operates over the extended (-40°C to +85°C) temperature range.
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