MAX5971A Datasheet | Maxim Integrated

19-5142; Rev 0; 1/10 TION KIT EVALUA BLE AVAILA .. Single-Port, 40W, IEEE 802.3af/at PSE Controller with Integrated MOSFET Features S IEEE 802.3af/at pliant S Up to 40W for Single-Port PSE Applications S Integrated 0.5I Power MOSFET and Sense General Description The MAX5971A is a single-port, power-sourcing equipment (PSE) power controller designed for use in IEEE® 802.3af/at-pliant PSE. This device provides powered device (PD) discovery, classification, current limit, and DC and AC load-disconnect detections. The MAX5971A operates automatically without the need for any software programming and Features an integrated power MOSFET and sense resistor. The device also supports new Class 5 and 2-event classification for detection and classification of high-power PDs. The MAX5971A provides up to 40W to a single port (Class 5 enabled) and still provides highcapacitance detection for legacy PDs. The MAX5971A provides input undervoltage lockout (UVLO), input overvoltage lockout, overtemperature detection, output voltage slew-rate limit during startup, and LED status indication. The MAX5971A is available in a space-saving, 28-pin TQFN (5mm x 5mm) power package, and is rated for the extended (-40NC to +85NC) temperature range. Resistor S PD Detection and Classification S Programmable Current Limit for Class 5 PDs S High-Capacitance Detection for Legacy Devices S Supports Both DC and AC Load Removal Detections S Current Foldback and Duty Cycle-Controlled Current Limit S LED Indicator for Port Status S Direct Fast-Shutdown Control Capability S Space-Saving, 28-Pin TQFN (5mm x 5mm) Package Ordering Information PART MAX5971AETI+ TEMP RANGE -40NC to +85NC PIN-PACKAGE 28 TQFN-EP- Applications Single-Port PSE End-Point Applications Single-Port PSE Power Injectors (Midspan Applications) Switches/Routers Industrial Automation Equipment Wireless LAN Access Point/Wi MAX™ Base Station +Denotes a lead(Pb)-free/Ro HS-pliant package. -...