MAX5971A

Single-Port, 40W, IEEE 802.3af/at PSE Controller with Integrated MOSFET

40W, Single-Port, IEEE 802.3af/at-Compliant PSE Controller with Integrated 0.5Ω Power MOSFET and Sense Resistor


Please check latest availability status for a specific part variant.

Description

The MAX5971A is a single-port, power-sourcing equipment (PSE) power controller designed for use in IEEE® 802.3af/at-compliant PSE. This device provides powered device (PD) discovery, classification, current limit, 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 high-capacitance 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 (-40°C to +85°C) temperature range.
MAX5971A: Typical Operating Circuit MAX5971A: Typical Operating Circuit Enlarge+

Key Features

  • IEEE 802.3af/at Compliant
  • Up to 40W for Single-Port PSE Applications
  • Integrated 0.5Ω Power MOSFET and Sense Resistor
  • PD Detection and Classification
  • Programmable Current Limit for Class 5 PDs
  • High-Capacitance Detection for Legacy Devices
  • Supports Both DC and AC Load Removal Detections
  • Current Foldback and Duty Cycle-Controlled Current Limit
  • LED Indicator for Port Status
  • Direct Fast-Shutdown Control Capability
  • Space-Saving, 28-Pin TQFN (5mm x 5mm) Package

Applications/Uses

  • Industrial Automation Equipment
  • Single-Port PSE End-Point Applications
  • Single-Port PSE Power Injectors (Midspan Applications)
  • Switches/Routers
  • Wireless LAN Access Points/WiMAX™ Base Station
Part NumberComplianceHigh Power ModeChannelsPort Current ReadoutLoad DisconnectPackage/PinsOper. Temp.
(°C)
Budgetary
Price
See Notes
MAX5971A 
IEEE 802.3af
IEEE 802.3at
Yes1No
AC/DC
DC
TQFN/28
-40 to +85$4.51 @1k
See All Power Sourcing Equipment (8)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


MAX5971AEVKIT: Evaluation Kit for the MAX5971A

Technical Documents

App Note 6220 40W Single Port MAX5971A Current Sensing
App Note 6161 25.5W-80W Class 5 Single Port PoE Power Injector

Quality and Environmental Data

Product Reliability Reports: MAX5971A.pdf 
Lead-Free Package Tin (Sn) Whisker Reports
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

Quality Management System >
Environmental Management System >

 
Status:
Package:
Temperature:

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