MAX5971AEVKIT Maxim Integrated, MAX5971AEVKIT Datasheet

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MAX5971AEVKIT

Manufacturer Part Number
MAX5971AEVKIT
Description
Power Management IC Development Tools
Manufacturer
Maxim Integrated
Series
MAX5971r
Datasheet
The MAX5971A evaluation kit (EV kit) is a fully assembled
and tested surface-mount circuit board featuring an
Ethernet single-port power-sourcing equipment (PSE)
circuit for -54V supply rail systems. The IEEE
at-compliant MAX5971A 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 power-over-Ethernet (PoE) applications
requiring DC power over a single Ethernet network port.
The EV kit requires a -32V to -60V power supply (-54V
supply 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
network port by sensing current through the port and
controlling the IC’s internal power MOSFET. The current
is fed to a 1 x 1 gigabit MagJack
Ethernet output port.
The EV kit demonstrates the full functionality of the IC’s
operational modes, such as configurable high-power
modes (programmable up to 40W), PD detection, PD
classification,
back, undervoltage/overvoltage protection, and AC-/
DC-disconnect monitoring. All these features are configu-
rable on the EV kit, with additional test points for voltage
probing and current measurements provided. The EV kit
can also be configured for midspan or end-point network
operation.
IEEE is a registered service mark of the Institute of Electrical
and Electronics Engineers, Inc.
MagJack is a registered trademark of Bel Fuse Inc.
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.
overcurrent
_________________________________________________________________ Maxim Integrated Products 1
General Description
protection,
M
module at the EV kit’s
current
M
802.3af/
fold-
MAX5971A Evaluation Kit
S IEEE 802.3af/at-Compliant PSE Circuit
S High-Power Class 5 Mode Configurable Up to 40W
S -32V to -60V Input Voltage Providing 1A
S Ethernet Network Ports
S Demonstrates IC’s Internal Power Switch and
S Demonstrates Standard and Legacy PD Detection
S Configurable for Midspan or End-Point Mode
S Configurable AC/DC Load-Removal Detection and
S Convenient Voltage and Current Test Points
S Demonstrates the EV Kit Circuit’s Output Port
S Proven PCB Layout
S Fully Assembled and Tested
Ordering Information
DESIGNATION
Current Sensing
and Classification
Disconnect Monitoring
LED-Status Indicator
C2, C3, C5
RJ45 10/100/1000BASE-TX Ethernet Network
Data Input Port
RJ45 10/100/1000BASE-TX Ethernet Network
PSE Output Port
Evaluates: MAX5971A
C12
C1
C4
C6
QTY
1
3
1
1
1
appears at end of data sheet.
47FF Q20%, 100V electrolytic
capacitor (12.5mm x 13.5mm)
Panasonic EEEFK2A470AQ
0.1FF Q10%, 100V X7R ceramic
capacitors (0603)
Murata GRM188R72A104KA35B
0.47FF Q10%, 100V X7R ceramic
capacitor (0805)
Murata GRM21BR72A474KA73B
0.1FF Q10%, 16V X7R ceramic
capacitor (0603)
Murata GRM188R71C104K
1000pF Q10%, 50V X7R ceramic
capacitor (0603)
Murata GRM188R71H102K
Component List
DESCRIPTION
19-5740; Rev 0; 1/11
Features

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MAX5971AEVKIT Summary of contents

Page 1

... IEEE is a registered service mark of the Institute of Electrical and Electronics Engineers, Inc. MagJack is a registered trademark of Bel Fuse Inc. _________________________________________________________________ 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. MAX5971A Evaluation Kit Evaluates: MAX5971A S IEEE 802 ...

Page 2

... Diodes Incorporated Fairchild Semiconductor Murata Electronics North America, Inc. Panasonic Corp. Vishay Note: Indicate that you are using the MAX5971A when contacting these component suppliers. _________________________________________________________________ Maxim Integrated Products 2 MAX5971A Evaluation Kit DESCRIPTION DESIGNATION R3, R10–R13, TP1, TP3–TP6, TP9, TP10 TP11, TP13 *EP = Exposed pad ...

Page 3

... Use an isolated oscilloscope for probing with respect to VEE or RTN. 8) Pressing pushbutton switch SW1 shuts down the PSE output DC power and resets U1. _________________________________________________________________ Maxim Integrated Products 3 MAX5971A Evaluation Kit Evaluates: MAX5971A Quick Start Detailed Description of Hardware The MAX5971A EV kit features a 10/100/1000BASE-TX Ethernet single-port PSE controller circuit for -54V sup- ply rail systems. The EV kit’ ...

Page 4

... Internally pulled high Connected to VEE through Installed resistor R12 *Default position. _________________________________________________________________ Maxim Integrated Products 4 MAX5971A Evaluation Kit Evaluates: MAX5971A power Class 5 mode. Jumper JU1 sets the IC’s ILIM1 configuration and jumper JU2 sets the ILIM2 configura- tion. Table 1 lists the jumper options for the modes used to detect a valid PD connected to the PSE Ethernet out- put port ...

Page 5

... Monitoring and DC Disconnect Monitoring sections in the MAX5971A IC data sheet for additional information. Table 7 lists the jumper options for the oscillator and AC/ DC configurations. Refer to the MAX5971A IC data sheet for more information. _________________________________________________________________ Maxim Integrated Products 5 MAX5971A Evaluation Kit Evaluates: MAX5971A MIDSPAN PIN Internally pulled high ...

Page 6

... Installed Connected to VEE Connected to VEE through Not installed* capacitor C6 *Default position. Table 8. Switch SW1 Operational Modes (EN) SWITCH POSITION Not pressed Pressed *Default position. _________________________________________________________________ Maxim Integrated Products 6 MAX5971A Evaluation Kit Evaluates: MAX5971A RESISTOR R3 R9 Not installed Installed Installed Not installed EN PIN ...

Page 7

... Figure 1. MAX5971A EV Kit Schematic—Controller Circuit _________________________________________________________________ Maxim Integrated Products 7 MAX5971A Evaluation Kit Evaluates: MAX5971A ...

Page 8

... Figure 2. MAX5971A EV Kit Component Placement Guide— Component Side Figure 4. MAX5971A EV Kit PCB Layout—Solder Side _________________________________________________________________ Maxim Integrated Products 8 MAX5971A Evaluation Kit Evaluates: MAX5971A 1.0’’ Figure 3. MAX5971A EV Kit PCB Layout—Component Side 1.0’’ 1.0’’ ...

Page 9

... Ordering Information PART MAX5971AEVKIT+ +Denotes lead(Pb)-free and RoHS compliant. _________________________________________________________________ Maxim Integrated Products 9 MAX5971A Evaluation Kit Evaluates: MAX5971A TYPE EV Kit ...

Page 10

... 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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