POEPHYTEREV-I National Semiconductor, POEPHYTEREV-I Datasheet

POEPHYTEREV-I

Manufacturer Part Number

POEPHYTEREV-I

Description

BOARD EVAL LM5072, DP83848I

Manufacturer

National Semiconductor

Series

PHYTER®r

Datasheets

1.DP83848IVVNOPB.pdf (84 pages)

2.LM5072MHX-50NOPB.pdf (26 pages)

3.DP83848C-MAU-EK.pdf (18 pages)

Specifications of POEPHYTEREV-I

Main Purpose

Special Purpose DC/DC, Power Over Ethernet

Outputs And Type

1, Isolated

Power - Output

24W

Voltage - Output

3.3V

Current - Output

7.3A

Voltage - Input

39 ~ 57V

Regulator Topology

Flyback

Frequency - Switching

250kHz

Board Type

Fully Populated

Utilized Ic / Part

DP83848, LM5072

Lead Free Status / RoHS Status

Not applicable / Not applicable

Current page: 1 of 18
Download datasheet (15Mb)

POEPHYTEREV-I / -E User

Guide

Introduction

The POEPHYTEREV-I/-E evaluation board is a seamless de-

sign demonstrating National’s LM5072 PoE product (capable

of up to 24W) and DP83848I (single port 10/100Mb/s) Ether-

net PHYTER® product. While both the LM5072 and the

DP83848 Ethernet PHY device have many advanced and

enticing features, this specific board is designed to demon-

strate a subset of those features, specifically Power over

Ethernet. Two versions of this board are available. The –I

version has an RJ-45 connector that with integrated Ethernet

magnetics. The –E version has discrete RJ-45 connector and

Ethernet magnetics. The schematics of the board are avail-

able with this kit for duplication into an end application prod-

uct.

For additional features of the PoE and PHY devices, individ-

ual device evaluation boards are separately available. For

detailed information about the complete functions and fea-

tures of the LM5072 or DP83848 devices, refer to the relevant

datasheets. For applications where IEEE 802.3af must be

complied with and the power level is below 12.95W, refer to

Application

AN-1455.pdf). For detailed information about the Ethernet

PHYTER® circuit, refer to Application Note AN-1469

(www.national.com/an/AN/AN-1469.pdf).

This evaluation kit contains:

•

Scope of Applications

The POEPHYTEREV-I/-E evaluation kit (EK) is designed for

high power PD (PoE terminology - Powered Device) applica-

tions in which the maximum power exceeds the IEEE

802.3af’s 12.95W limit. The evaluation board features

National’s DP83848 10/100 Mb/s PHYTER® Ethernet Phys-

ical Layer Transceiver, so any equipment that provides a

standard IEEE 802.3, Clause 22 MII DTE interface; e.g.

SmartBits/Netcom box, is required as a data source for the

Ethernet device. The LM5072 is a 100V, high power PoE PD

and PWM controller. The evaluation board is capable of op-

erating with both PoE and auxiliary (AUX) power sources. The

dc-dc converter stage of the power supply is implemented in

the versatile flyback converter topology.

Important Note on Circuit Board

Versions

There are two versions of PCBs being built, which can be

identified by the PCB serial number printed along the left edge

of the top side the circuit board. One version is labelled

551012916-001 Rev A, the other 551013040-001 Rev A. The

first version cannot modify the 3.3V output to higher voltages

because it is directly connected to the PHY through inner lay-

ers. It is modified on the second version such that higher

output voltage can be produced without damaging the PHY

circuit. The factory default output setting for both versions is

POEPHYTEREV-I or –E Evaluation board

Printed copy of this User's Guide

Board schematic

End User Licensing Agreement (EULA)

Note

AN-1455

(www.national.com/an/AN/

202052

National Semiconductor

Application Note 1521

Youhao Xi Bradley Kennedy

April 4, 2008

3.3V. Contact National on support to modify the latter version

to other output voltage.

In the following, descriptions apply to both versions of the cir-

cuit boards unless specifically indicated.

Features of the Evaluation Board

Seamless

PHYTER® single port 10/100 Mb/s Ethernet physical layer

transceiver and LM5072 High Power PoE PD and PWM con-

troller.

Ethernet

•

Power Over Ethernet

•

PCB Layout Considerations

•

Integrated or External magnetics and RJ45

Minimum configuration requirements:

mode selected

PWR_DWN/INT, MII/RMII Sel

Connections for the following interfaces:

On-board clock – Crystal/Oscillator Dual Footprint

Isolated output voltage: 3.3V

Maximum output current: 7.3A

Maximum output power: 24W

Input voltage ranges:

Measured maximum efficiency:

86% at 6A

Overall Board Size: 5.50” x 3.96” x 0.70”

Switching frequency: 250 kHz

Optional input common-mode filter

FR4 material

Trace symmetry within differential pair (±0.5")

Differential impedance 100 ohms, ±5%

Adjacent differential pairs spacing > 2X distance within a

differential pair, to minimize cross-talk and EMI

Trace length matching between differential pairs not

required

Uniform supply & ground plane

Void planes under magnetics, except for Chassis GND (at

RJ-45 edge only)

Combination of through-hole and surface mount

technology

Trace/space will be 0.007”/0.008” minimum

2 PHY Addresses - 01h (default) or 03h

Status LEDs – board power, others dependant on LED

Limited Strap Options – MDIX_EN, LED_CFG,

RESET_N jumper

PWR_DWN/INT jumper

MIl/RMII Interface (IEEE 802.3 standard)

RJ-45 Cat-V Ethernet cable connector

JTAG header

25MHz_OUT header

Header for “ribbon cable” connection to MII/RMII

PoE input voltage range: 39 to 57V

AUX input voltage range: 22 to 57V

DC to DC converter efficiency: 90% at 6A

Overall efficiency (including the input diode bridge):

design

solution,

incorporating

www.national.com

DP83848

Related parts for POEPHYTEREV-I

POEPHYTEREV-I Summary of contents

Page 1

... Board schematic • End User Licensing Agreement (EULA) Scope of Applications The POEPHYTEREV-I/-E evaluation kit (EK) is designed for high power PD (PoE terminology - Powered Device) applica- tions in which the maximum power exceeds the IEEE 802.3af’s 12.95W limit. The evaluation board features National’s DP83848 10/100 Mb/s PHYTER® Ethernet Phys- ical Layer Transceiver, so any equipment that provides a standard IEEE 802.3, Clause 22 MII DTE interface ...

Page 2

... JTAG access via 2x5 header Usage setup and Configuration This section contains information about the setup and con- figuration of the POEPHYTEREV-I/-E evaluation board, in- cluding descriptions of the card's interfaces, connectors, jumpers and LEDs. Power for the POEPHYTEREV board can be supplied by a number of means: • ...

Page 3

Software No device specific software is required for this board National does provide the integrity utility; a diagnostic and configura- tion package at: www.national.com/appinfo/networks/ethernet_utility.html An Important Note About the Maximum Power Capability and Cable Usage The maximum output power is ...

Page 4

www.national.com 4 ...

Page 5

5 www.national.com ...

Page 6

www.national.com 6 ...

Page 7

Connection and Proper Test Methods Figure 4 shows a photo of the evaluation board with the con- nection ports indicated. The PoE circuit occupies the lower part of the board within the rectangular outline. The RJ45 connectors, Ethernet magnetics and ...

Page 8

... AUX input voltage level sensed by the VIN pin of the LM5072. A more efficient and generally better performing AUX inrush limiter can be achieved with additional circuitry employing a bipolar transis- tor or MOSFET. Contact National Semiconductor for support. 8 ...

Page 9

... AUX source, if the output power level is re- duced. If full power is required under low AUX input voltage, the power transformer will need to be redesigned. Contact National Semiconductor for assistance. PoE Performance Characteristics PoE INPUT POWER UP SEQUENCE The PoE power up sequence is as follows. Note that the RTN pin (IC pin 8) is isolated from the +3 ...

Page 10

Horizontal Resolution: 50 ms/div. Trace 1: PoE input voltage across the VIN and VEE pins. 20V/div. Trace 2: Voltage across the RTN and VEE pins, namely the voltage across the Hot Swap MOSFET. 20V/div. Trace 3: The input current. 0.2A/div. ...

Page 11

Horizontal Resolution: 1 µs/div. Trace 1: Current sense voltage across RE15. 0.5V/div. Trace 2: The input current from the AUX power source. 100 mA/div FIGURE 8. Cycle-by-cycle Peak Current Limit under 48V PoE Input and Output Dead Short Condition Figure ...

Page 12

Horizontal Resolution: 5 µs/div. Trace 1: The AUX input current ripples (AC coupled). 10 mA/div. Trace 2: The FFT of Trace 1 showing the peak value of the harmonics. Hor- izontal 500 kHz/div. Vertical 2.5 mA/div. FIGURE 12. AUX Input ...

Page 13

Bill of Materials ITEM PART NUMBER BR1 CBR1-D020S BR2 CBR1-D020S CE1 C2012X7R1E474K CE2 NU CE3 NU CE4 C5750X7R2A475M CE6 C5750X7R2A475M CE6 EEV-HA2A220P CE7 C3216X5R0J226M CE8 C3216X5R0J226M CE9 C3216X5R0J226M CE10 C3216X5R0J226M CE11 C2012X7R1E474K CE12 NU CE13 NU CE14 NU CE15 C3216X5R0J226M ...

Page 14

ITEM PART NUMBER TP3 5012K-ND TP4 5012K-ND TP7 5012K-ND TP8 5012K-ND TP12 NU Q1A SI7898DP Q1B NU Q2 BSC022N03SG QE5 SI2301 QE6 SI2301 RE1A CRCW12068R20J RE1B CRCW12068R20J RE1C CRCW12068R20J RE1D CRCW12068R20J RE2A CRCW12068R20J RE2B CRCW12068R20J RE2C CRCW12068R20J RE2D CRCW12068R20J RE3 ...

Page 15

ITEM PART NUMBER UE3 LMV431A ZE1 CMZ5944B ZE2 SMAJ58A ZE3 CMPZ4619 ITEM PART NUMBER C10 C11 C12 C13 C14 C15 C16 C17 C18 C20 C21 C22 C23 C49 C50 C53 C54 ...

Page 16

ITEM PART NUMBER J10 NU J11 NU J13 CN-PHONE8P8C-RA-SHLD J15 J16 J18 NU R1 CRCW060333R0J R2 CRCW060333R0J R3 CRCW060333R0J R4 CRCW060333R0J R5 CRCW060333R0J R6 CRCW060333R0J R7 CRCW06032201F R8 CRCW06032201F R9 CRCW06032201F R10 CRCW06032201F R11 CRCW06032201F R12 CRCW06032201F R13 CRCW06032201F R14 ...

Page 17

ITEM PART NUMBER R51 CRCW12060R0J R52 CRCW12060R0J R53 CRCW12060R0J R54 CRCW12060R0J R55 CRCW12060R0J R56 CRCW12060R0J R57 CRCW12060R0J U1 DP83848-IVV U4 ETH1-230LD U10 NU UE13 0838-1X1T-W6 Y1 FOXSLF/250F-20 Note: NU stands for Not Used, namely not populated. ...

Page 18

... For more National Semiconductor product information and proven design tools, visit the following Web sites at: Products Amplifiers www.national.com/amplifiers Audio www.national.com/audio Clock Conditioners www.national.com/timing Data Converters www.national.com/adc Displays www.national.com/displays Ethernet www.national.com/ethernet Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators www.national.com/switchers LDOs www ...

Related keywords

POEPHYTEREV-I datasheet
POEPHYTEREV-I data sheet
POEPHYTEREV-I pdf datasheet
POEPHYTEREV-I component
POEPHYTEREV-I part
POEPHYTEREV-I distributor
POEPHYTEREV-I RoHS
POEPHYTEREV-I datasheet download