MAX5971BEVKIT+ Maxim Integrated, MAX5971BEVKIT+ Datasheet

MAX5971BEVKIT+

Manufacturer Part Number

MAX5971BEVKIT+

Description

Power Management IC Development Tools

Manufacturer

Maxim Integrated

Series

MAX5971r

Datasheet

1.MAX5971BEVKIT.pdf (22 pages)

Specifications of MAX5971BEVKIT+

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The MAX5971B evaluation kit (EV kit) is a fully assembled

and tested surface-mount PCB featuring an Ethernet

single-port power-sourcing equipment (PSE) circuit for

-54V supply rail systems. The IEEE

MAX5971B PSE controller IC, in a 28-pin TQFN package,

features an internal n-channel power MOSFET forming

the main PSE circuit on the EV kit. The IC is used in

single-port power-over-Ethernet (PoE) applications.

The EV kit provides optical isolation for the IC’s I

compatible 2-wire interface. The isolated interface can

connect to a PC’s USB port through an on-board

USB interface circuit. The EV kit can be reconfigured

for interfacing to a user’s stand-alone microcontroller

for isolated or nonisolated operation. In stand-alone

operation, the user must supply a separate +3.3V

power supply capable of supplying 35mA. The EV

kit requires a -32V to -60V power supply (-54V sup-

ply rail) capable of supplying 1A or more to the EV

kit for powering the powered device (PD) through the

10/100/1000BASE-TX Ethernet network port. The EV

kit demonstrates PD discovery, classification, current-

limit control, and other functions of an IEEE 802.3af/at-

compliant PSE.

The IC controls the -54V DC power to the Ethernet net-

work port by sensing current through the port and con-

trolling the IC’s internal power MOSFET. Current is fed

to a 1Gb x 1Gb MagJack

The EV kit demonstrates the full functionality of the IC,

such as configurable operational modes, port current

information through the I

(programmable up to 40W), PD detection (including

legacy PD detection), PD classification, overcurrent

protection, current foldback, undervoltage/overvoltage

protection, and AC-/DC-disconnect monitoring. All these

features are configurable on the EV kit, with additional

test points for voltage probing and current measure-

ments provided. The EV kit can also be configured for

midspan or end-point network operation. The EV kit soft-

ware is Windows

Vista

to demonstrate the IC features while providing access

to each register at the bit level. The program is menu

driven, offers a graphical user interface (GUI) with con-

trol buttons, and includes a macro engine for automated

evaluation and testing of the IC at the system level. The

program’s macro output files can be automatically saved.

Order the EV kit for a complete PC-based evaluation

of the IC. To evaluate the MAX5971A IC, order the

MAX5971A EV kit.

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

or visit Maxim’s website at www.maxim-ic.com.

compatible, providing a user-friendly interface

_________________________________________________________________ Maxim Integrated Products 1

2000, Windows XP

General Description

C interface, high-power modes

module Ethernet output port.

802.3af/at-compliant

, and Windows

C-

MAX5971B Evaluation Kit

IEEE is a registered service mark of the Institute of Electrical

and Electronics Engineers, Inc.

MagJack is a registered trademark of Bel Fuse Inc.

Windows, Windows XP, and Windows Vista are registered

trademarks of Microsoft Corp.

Ordering Information

IEEE 802.3af/at-Compliant PSE Circuit

Port Current Read-Out Through I

High-Power Class 5 Mode Configurable Up to 40W

-32V to -60V Input Voltage Providing 1A

Ethernet Network Ports

Demonstrates MAX5971B Internal Power Switch

and Current Sensing

Demonstrates Standard and Legacy PD Detection

and Classification

Configurable for Midspan or End-Point Mode

Configurable AC/DC Load-Removal Detection and

Disconnect Monitoring

Convenient Voltage and Current Test Points

Demonstrates IC’s Output-Port LED Status

Indicators

Optically Isolated I

Interface

Reconfigurable for Stand-Alone Operation or with

an External Microcontroller (Requires +3.3V, 35mA

Supply)

Windows 2000-, Windows XP-, and Windows Vista

(32-Bit)-Compatible Software

Proven PCB Layout

Fully Assembled and Tested

Evaluates: MAX5971B

RJ45 10/100/1000BASE-TX Ethernet Network

Data Input Port

RJ45 10/100/1000BASE-TX Ethernet Network

PSE Output Port

appears at end of data sheet.

C-Compatible 2-Wire PC

C Interface

19-5783; Rev 0; 3/11

Features

Related parts for MAX5971BEVKIT+

MAX5971BEVKIT+ Summary of contents

Page 1

... Order the EV kit for a complete PC-based evaluation of the IC. To evaluate the MAX5971A IC, order the MAX5971A EV kit. _________________________________________________________________ Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. MAX5971B Evaluation Kit Evaluates: MAX5971B IEEE 802 ...

Page 2

... C211, C212 2 Murata GRM1885C1H100J or TDK C1608C0G1H100J 1FF Q10%, 10V X5R ceramic capacitor (0603) C214 1 Murata GRM188R61A105K or TDK C1608X5R1A105K _________________________________________________________________ Maxim Integrated Products 2 Evaluates: MAX5971B Component List DESIGNATION QTY DESCRIPTION 2.2FF Q10%, 6.3V X5R ceramic capacitor (0603) C216 1 Murata GRM188R60J225K or TDK C1608X5R0J225K ...

Page 3

... Miniature PC test point, red TP11, TP13 2 Miniature PC test points, black Single-port PSE controller U1 1 (28 TQFN-EP) Maxim MAX5971BETI+ TinyLogic is a registered trademark of Fairchild Semiconductor. _________________________________________________________________ Maxim Integrated Products 3 DESCRIPTION DESIGNATION Evaluates: MAX5971B Component List (continued) QTY DESCRIPTION High-voltage linear regulator TDFN-EP) ...

Page 4

... VEE or RTN. Note: In the following sections, software-related items are identified by bolding. Text in bold refers to items directly from the EV kit software. Text in bold and underlined refers to items from the Windows operating system. _________________________________________________________________ Maxim Integrated Products 4 Evaluates: MAX5971B PHONE 843-946-0238 201-432-0463 ...

Page 5

... The network output port’s yellow and green status LEDs on J2 should be lit. 16) Four other example macros allow quick testing of the manual mode, auto mode, semiauto mode, _________________________________________________________________ Maxim Integrated Products 5 Evaluates: MAX5971B and with DC and/or AC load-disconnect detection. These macros are: • ...

Page 6

... Reset button. All other configuration changes on this tab take place after the Update MAX5971B button has been pressed. _________________________________________________________________ Maxim Integrated Products 6 To view a specific port event or status after updating, select the Events and Status tab. The port’s operating ...

Page 7

... The status bar at the bottom left of the main window indi- cates the USB interface circuit status. The center status bar indicates the current EV kit and macro engine status. _________________________________________________________________ Maxim Integrated Products 7 Evaluates: MAX5971B Autoread and Run-Macro State Controls When the Auto Read checkbox is checked, the program continuously updates the main window registers and is oper- ating in the autoread state ...

Page 8

... Pressing the Run button runs the macro to completion, with the output displayed in the Macro Script Output edit field. Each edit box can be sized relative to _________________________________________________________________ Maxim Integrated Products 8 Evaluates: MAX5971B the other half using the splitter bar above the Script Output text ...

Page 9

... The EV kit can be reinitialized to the startup screen settings by first closing the Advanced User Interface utility, resetting the SMBus is a trademark of Intel Corp. _________________________________________________________________ Maxim Integrated Products 9 Evaluates: MAX5971B IC by pressing the reset pushbutton switch (SW1), and relaunching the software. ...

Page 10

... PCB pad connects to the network system ground. Note that the 10/100/1000BASE-TX magnetic output module RJ45 jack (J2) is rated for up to 700mA of ________________________________________________________________ Maxim Integrated Products 10 Evaluates: MAX5971B current. See the 35W or More Power Operation Without an Ethernet Connection section for operation at or above 35W. ...

Page 11

... Note: The EV kit’s provided 3_3V is at +3.3V. The OPTO_GND, GND, and VEE planes are isolated by the optical couplers. ________________________________________________________________ Maxim Integrated Products 11 Evaluates: MAX5971B Since the GND is more positive than VEE or RTN, use an isolated oscilloscope when probing signals with respect to VEE or RTN ...

Page 12

... Table 7. OSC and AC-/DC-Disconnect-Detection Functions (JU6) SHUNT POSITION OSC PIN Installed Connected to VEE Connected to VEE Not installed* through capacitor C6 *Default position. ________________________________________________________________ Maxim Integrated Products 12 Evaluates: MAX5971B ILIM2 PIN (JU2) THRESHOLD (mA) Not installed Not installed Installed Installed Table 3. Green LED Status (J2) ...

Page 13

... Table 10 lists the selectable jumper options. ________________________________________________________________ Maxim Integrated Products 13 The 10/100/1000BASE-TX magnetic output module RJ45 jack (J2) is rated for up to 700mA of current and cannot be used for PSE operation at greater than 35W power. ...

Page 14

... Nonisolated (Cut open) ** Nonisolated *Default set by PCB trace. **See the External +3.3V Operation section for configuring the EV kit in nonisolated mode. ________________________________________________________________ Maxim Integrated Products 14 Evaluates: MAX5971B EN PIN Internally pulled high Connected to VEE through resistor R16 AD0 PIN SLAVE ADDRESS Connected to VEE ...

Page 15

... Figure 5a. MAX5971B EV Kit Schematic—Controller Circuit (Sheet ________________________________________________________________ Maxim Integrated Products 15 Evaluates: MAX5971B ...

Page 16

... Figure 5b. MAX5971B EV Kit Schematic—LDO and Optical Coupler Circuit (Sheet ________________________________________________________________ Maxim Integrated Products 16 Evaluates: MAX5971B ...

Page 17

... Figure 5c. MAX5971B EV Kit Schematic—USB Interface Circuit (Sheet ________________________________________________________________ Maxim Integrated Products 17 Evaluates: MAX5971B ...

Page 18

... Figure 6. MAX5971B EV Kit Component Placement Guide—Component Side ________________________________________________________________ Maxim Integrated Products 18 Evaluates: MAX5971B 1.0” ...

Page 19

... Figure 7. MAX5971B EV Kit PCB Layout—Component Side ________________________________________________________________ Maxim Integrated Products 19 Evaluates: MAX5971B 1.0” ...

Page 20

... Figure 8. MAX5971B EV Kit PCB Layout—Solder Side ________________________________________________________________ Maxim Integrated Products 20 Evaluates: MAX5971B 1.0” ...

Page 21

... Ordering Information PART MAX5971BEVKIT# #Denotes RoHS compliant. ________________________________________________________________ Maxim Integrated Products 21 Evaluates: MAX5971B TYPE EV KIT ...

Page 22

... 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 © ...

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