MAX5945EVKIT Maxim Integrated, MAX5945EVKIT Datasheet

MAX5945EVKIT

Manufacturer Part Number

MAX5945EVKIT

Description

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

Manufacturer

Maxim Integrated

Series

MAX5945r

Datasheet

1.MAX5945EVSYS.pdf (23 pages)

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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

Related parts for MAX5945EVKIT

MAX5945EVKIT Summary of contents

Page 1

... 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 2 C-compliant 3-wire require PC-based evaluation of the MAX5945. ♦ ...

Page 2

... MAX5945 Evaluation Kit/Evaluation System MAX5945EVSYS (MAX5945 EV System) Component List PART QTY MAX5945EVKIT 1 MAX5945 evaluation kit MAXSMBus 1 SMBus interface board DESIGNATION QTY DESCRIPTION 220µF ±20%, 100V electrolytic C1 1 capacitor (18mm x 16.5mm) Panasonic EEVFK2A221M 1.0µF ±10%, 6.3V X5R ceramic C2 capacitors (0603) Taiyo Yuden JMK107BJ105KA 10µ ...

Page 3

MAX5945 Evaluation Kit/Evaluation System DESIGNATION QTY DESCRIPTION 0.500Ω ±1% resistors (1206) R1–R4 4 IRC LR1206-01-R500-F R5, R8, 180Ω ±5% resistors (0603) 4 R56, R71 R6, R7, R9, 3kΩ ±5% resistors (0603) 8 R29, R30, R53, R54, R77 R10–R22, R26, R28, ...

Page 4

MAX5945 Evaluation Kit/Evaluation System SUPPLIER Central Semiconductor Diodes Incorperated Fairchild IRC Murata Panasonic Pulse Engineering Taiyo Yuden TDK Vishay Note: Indicate that you are using the MAX5945 when contacting these component suppliers. The MAX5945 EV kit is fully assembled and ...

Page 5

MAX5945 Evaluation Kit/Evaluation System 13) Connect the MAX5945 EV kit’s network input LAN port to the corresponding PD LAN connection as listed below: • PORT1_IN at J3 • PORT2_IN at J4 • PORT3_IN at J5 • PORT4_IN at J6 14) ...

Page 6

MAX5945 Evaluation Kit/Evaluation System MOSFET and sensing current through the respective port’s current-sense resistor. The current is fed to a 10/100 base-TX VoIP magnetic module connected to the respective Ethernet network output port’s RJ-45 jack. An IEEE 802.3af-compliant PD connects ...

Page 7

MAX5945 Evaluation Kit/Evaluation System Table 1. MAX5945 Slave Address Selection JU4 (BIT A3) JU3 (BIT A2) SHUNT SHUNT 2-3 2-3 2-3 2-3 2-3 2-3 2-3 2-3 2-3 1-2 2-3 1-2 2-3 1-2 2-3 1-2 1-2 2-3 1-2 2-3 1-2 2-3 ...

Page 8

MAX5945 Evaluation Kit/Evaluation System Jumper Selection The MAX5945 EV kit features several jumpers to recon- figure the EV kit for various PSE configurations and PD requirements. Additionally, jumpers and PC board pads are provided for connecting an external micro- controller. ...

Page 9

MAX5945 Evaluation Kit/Evaluation System 100Hz Oscillator Shutdown The MAX5945 EV kit features a jumper to set the EV kit’s on-board 100Hz oscillator modes of operation. Table 5 lists the selectable jumper options to configure the 100Hz oscillator. Table 5. Jumper ...

Page 10

MAX5945 Evaluation Kit/Evaluation System Table 7. AC Disconnect Jumper Functions PORT JUMPER SHUNT POSITION Port 1 JU15 Port 2 JU16 Port 3 JU17 Port 4 JU18 *See the Bypassing AC Disconnect and the DGND-to-GND Connection (Resistor R72) section. Table 8. ...

Page 11

MAX5945 Evaluation Kit/Evaluation System Table 10. Switch and Header J2 pin signals SWITCH SIGNAL SHDN1 S1 SHDN2 S2 SHDN3 S3 SHDN4 S4 S5 RESET None DGND SHDN and RESET Signals The MAX5945 EV kit features four pushbutton switches (S1, S2, ...

Page 12

MAX5945 Evaluation Kit/Evaluation System Figure 1. The MAX5945 Evaluation Software’s Main Window for Controlling the Software State, Configuring the MAX5945 Registers Using the Macro Engine and Displaying All the Registers In Binary and Hexadecimal Format The Locate Slave button is ...

Page 13

MAX5945 Evaluation Kit/Evaluation System Pulldown Menus and Saving Data Most of the main window’s available functions and a few more can be evaluated by using the pulldown menu. General-Purpose 2-Wire Interface Utility There are two methods for communicating with the ...

Page 14

MAX5945 Evaluation Kit/Evaluation System Figure 3. MAX5945 EV Kit Schematic (Controller Circuit) 14 ______________________________________________________________________________________ ...

Page 15

MAX5945 Evaluation Kit/Evaluation System Figure 4. MAX5945 EV Kit Schematic (Optical Coupler Circuit) ______________________________________________________________________________________ 15 ...

Page 16

MAX5945 Evaluation Kit/Evaluation System Figure 5. MAX5945 EV Kit Schematic (Network Interface) 16 ______________________________________________________________________________________ ...

Page 17

MAX5945 Evaluation Kit/Evaluation System 1 3 VDIG_F IN GND U6 C23 0.1µF MAX6106 C30 2 OUT 0.1µ R84 226kΩ LPA 1 LPA BPA 2 BPA 3 NA/HPA R85 R86 200kΩ 20kΩ INVA ...

Page 18

MAX5945 Evaluation Kit/Evaluation System Figure 7. MAX5945 EV Kit Component Placement Guide—Component Side 18 ______________________________________________________________________________________ ...

Page 19

MAX5945 Evaluation Kit/Evaluation System Figure 8. MAX5945 EV Kit PC Board Layout—Component Side ______________________________________________________________________________________ 19 ...

Page 20

MAX5945 Evaluation Kit/Evaluation System Figure 9. MAX5945 EV Kit PC Board Layout—GND Layer 2 20 ______________________________________________________________________________________ ...

Page 21

MAX5945 Evaluation Kit/Evaluation System Figure 10. MAX5945 EV Kit PC Board Layout—V CC Layer 3 ______________________________________________________________________________________ 21 ...

Page 22

MAX5945 Evaluation Kit/Evaluation System Figure 11. MAX5945 EV Kit PC Board Layout—Solder Side 22 ______________________________________________________________________________________ ...

Page 23

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 23 © 2005 Maxim Integrated Products MAX5945 Evaluation Kit is a registered trademark of Maxim Integrated Products, Inc ...

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