MAX5969DETE+T【PDF 1/16 页】IC CTRLR INTERFCE W/MOSFT 16TQFN

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IEEE 802.3af/at-Compliant, Powered Device Interface

Controller with Integrated Power MOSFET

_______________________________________________________________ Maxim Integrated Products 1

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxims website at www.maxim-ic.com.

General Description

The MAX5969D provides a complete interface for a

powered device (PD) to comply with the IEEE

?/DIV>

802.3af/

at standard in a power-over-Ethernet (PoE) system. The

MAX5969D provides the PD with a detection signa-

ture, classification signature, and an integrated isolation

power switch with inrush current control. During the

inrush period, the MAX5969D limits the current to less

than 180mA before switching to the higher current limit

(720mA to 880mA) when the isolation power MOSFET

is fully enhanced. The device features an input UVLO

with wide hysteresis and long deglitch time to compen-

sate for twisted-pair cable resistive drop and to assure

glitch-free transition during power-on/-off conditions. The

MAX5969D can withstand up to 100V at the input.

The MAX5969D supports a 2-event classification method

as specified in the IEEE 802.3at standard and provide a

signal to indicate when probed by a Type 2 power sourc-

ing equipment (PSE). The device detects the presence

of a wall adapter power source connection and allow a

smooth switch over from the PoE power source to the

wall power adaptor.

The MAX5969D also provides a power-good (PG) signal,

two-step current limit and foldback, overtemperature pro-

tection, and di/dt limit. The MAX5969D is available in a

16-pin, 5mm x 5mm TQFN power package. This device is

rated over the -40NC to +85NC extended temperature range.

Features

S IEEE 802.3af/at Compliant

S 2-Event Classification or an External Wall Adapter

Indicator Output

S Simplified Wall Adapter Interface

S PoE Classification 05

S 100V Input Absolute Maximum Rating

S Inrush Current Limit of 180mA Maximum

S Current Limit During Normal Operation Between

720mA and 880mA

S Current Limit and Foldback

S Legacy UVLO at 36V

S Overtemperature Protection

S Thermally Enhanced, 5mm x 5mm, 16-Pin TQFN

Applications

IEEE 802.3af/at Powered Devices

IP Phones, Wireless Access Nodes, IP Security

Cameras

WiMAXK Base Stations

19-5926; Rev 0; 6/11

+Denotes a lead(Pb)-free/RoHS-compliant package.

*EP = Exposed pad.

Ordering Information

WiMAX is a trademark of WiMAX Forum.

IEEE is a registered service mark of the Institute of Electrical

and Electronics Engineers, Inc.

PART

TEMP RANGE

PIN-PACKAGE

MAX5969DETE+

-40NC to +85NC

16 TQFN-EP*

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