MAX5945EVSYS Maxim Integrated, MAX5945EVSYS Datasheet

MAX5945EVSYS

Manufacturer Part Number

MAX5945EVSYS

Description

Power Management IC Development Tools Evaluation Kit/Evaluation System for the MAX5945

Manufacturer

Maxim Integrated

Series

MAX5945r

Datasheet

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The MAX5945 evaluation kit (EV kit) is a fully assembled

and tested surface-mount circuit board featuring an

Ethernet four-port network power controller circuit for

-48V supply rail systems. The MAX5945 IEEE 802.3af-

compliant network power controller is available in a 36-

pin SSOP package. The circuit includes four n-channel

power MOSFETs used to form the main power-sourcing

equipment (PSE) circuit on the EV kit. The MAX5945 is

used in power-over-ethernet (POE) applications requiring

DC power over four Ethernet network ports. The EV kit

provides optical isolation for the I

interface. The isolated interface connects to a PC parallel

port (LPT) through a MAXSMBus interface board. The EV

kit can easily be reconfigured for interfacing to a user’s

stand-alone microcontroller for isolated or nonisolated

operation.

The MAX5945 EV kit requires a -32V to -60V power sup-

ply (-48V supply rail) capable of supplying 2A or more to

the EV kit for powering the power device (PD) through

the four 10/100 base-TX Ethernet network ports. The EV

kit demonstrates PD discovery, classification, current-

limit control and other functions of an IEEE 802.3af-com-

pliant PSE. The user must also supply two separate 3.3V

power supplies capable of supplying 100mA for the EV

kit’s digital logic and 3.3V (V

interface. The MAXSMBus interface board requires a

dedicated 9V power supply capable of supplying

250mA. The +9V power supply is not required for noniso-

lated operation.

The MAX5945 controls the -48V DC power to each of the

four Ethernet network ports by controlling each port’s

power MOSFET and sensing current through the respec-

tive port’s current-sense resistor. The current is fed to a

10/100 base-TX Voice-over-IP (VoIP) magnetic module at

each Ethernet network output port. The MAX5945 EV kit

provides a separate independent power channel for

each of the four Ethernet network output ports.

The EV kit demonstrates the full functionality of the

MAX5945 for each power channel such as configurable

operational modes, PD detection, PD classification, over-

current protection, current foldback, under/overvoltage

protection, and AC disconnect monitoring. All of these

features are configurable on the EV kit and additional test

points for voltage probing and current measurements

have been provided.

19-3832; Rev 0; 9/05

Windows is a registered trademark of Microsoft Corp.

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

MAX5945 Evaluation Kit/Evaluation System

________________________________________________________________ Maxim Integrated Products

General Description

) optically isolated 3-wire

C-compliant 3-wire

The MAX5945 EV kit software is Windows® 95/98/2000-

compatible and provides a user-friendly interface to

demonstrate the features of the MAX5945 while provid-

ing access to each register at the bit level. The program

is menu-driven and offers a graphic interface with control

buttons. The program also includes a macro engine to

allow automated evaluation and testing of the MAX5945

at the system level. The program’s macro output files can

be automatically saved.

Order the MAX5945EVSYS for a complete PC-based

evaluation of the MAX5945. Order the MAX5945EVKIT if

you already have a MAXSMBus interface board or do not

require PC-based evaluation of the MAX5945.

♦ IEEE 802.3af-Compliant Power-Sourcing

♦ Input Voltages

♦ Ethernet Network Ports

♦ Demonstrates Four Separate Independent Power

♦ Provides PD Detection and Classification

♦ Configurable DC/AC Load Removal Detection and

♦ Configurable Current Sensing

♦ Convenient Voltage and Current Test Points

♦ Four Output-Port LED Status Indicators

♦ Optically Isolated 3-Wire I

♦ Reconfigurable for Stand-Alone Operation or with

♦ Windows 95/98/2000-Compatible Software

♦ Fully Assembled and Tested

Note: The MAX5945EV kit software is provided with the

MAX5945EVKIT. However, the MAXSMBUS interface board is

required to interface the EV kit to the computer when using the

software.

MAX5945EVKIT

MAX5945EVSYS

Equipment (PSE) Circuit

Switch Controllers

Interface

External Microcontroller

Disconnect Monitoring

Four RJ-45 10/100 Base-TX Ethernet Network

Input Ports

Four RJ-45 10/100 Base-TX Ethernet Network

Output Power-Over-Ethernet Ports

-32V to -60V Providing 2A (-48V Power Circuit,

350mA/Port)

+3.3V Providing 100mA (Digital Logic Power)

V CC (+3.3V) Provides 100mA (Optical Interface)

+9V Provides 250mA (SMBus LPT Interface

Board)

PART

0°C to +70°C

RANGE

TEMP

Ordering Information

C-Compliant PC

PACKAGE

36 SSOP

Features

INTERFACE

Not included

MAXSMBus

SMBus

TYPE

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