Analog Devices DC2911A Quick setup guide

1
DEMO MANUAL DC2911A
Rev. 0
DESCRIPTION
LT4293, LT4321
IEEE 802.3bt and LTPoE++
Interoperable Powered Device
Demonstration circuit 2911A is an IEEE 802.3bt compli-
ant and LTPoE++ interoperable Power over Ethernet (PoE)
Powered Device (PD). It features the LT
®
4293 PD interface
controller and the LT4321 PoE ideal diode bridge controller.
The LT4293 provides LTPoE++, IEEE 802.3af (PoE,
Type1), IEEE 802.3at (PoE+, Type 2), and IEEE 802.3bt
(PoE++, Type 3 and 4) compliant interfacing. It utilizes an
external, low RDS(ON) (30mΩ typical) N-channel MOSFET
for the Hot Swap function to improve efficiency.
Power good (PWRGD) output indicates the PD control-
ler is ready to provide power to the downstream load.
This signal can be used to enable an isolated power sup-
ply. The T2P output indicates the available powerfrom
the Power Sourcing Equipment (PSE). This signal
All registered trademarks and trademarks are the property of their respective owners.
PERFORMANCE SUMMARY
BOARD PHOTOS
communicates allocated power from either LTPoE++
or IEEE 802.3bt-compliant PSEs to the downstream
PDcircuitry.
The LT4321 controls eight low RDS(ON) (57mΩ typical)
N-channel MOSFETs to further improve end-to-end power
delivery efficiency and ease thermal design. This solution
replaces the eight diodes typically found in a passive PoE
rectifier bridge.
The DC2911A accepts up to 90W of delivered power from
a PSE via the RJ45 connector (J1) or a local 48V DC
power supply using the auxiliary supply input. When both
supplies are connected, the auxiliary supply input has
priority over the PoE input.
Design files for this circuit board are available.
Description
Performance Summary
Board Photos
Typical Performance Characteristics
Quick Start Procedure
Schematic Diagram
PARAMETER CONDITIONS VALUE
Port Voltage (VPORT) At RJ45 37V to 57V
Auxiliary Voltage From AUX+ to AUX– Terminals 37V to 57V
Efficiency VPORT = 48V, IOUT = 1.5A 99.2% (Typical)
T2P Switching Frequency Connected to an IEEE 802.3bt or LTPoE++ PSE
That Allocates at Least 38.7W
840Hz (Typical)
Top Side Bottom Side

2
DEMO MANUAL DC2911A
Rev. 0
TYPICAL PERFORMANCE CHARACTERISTICS
Figure1. Thermal Pictures (Conditions: VPORT = 41.2V, VOUT = 40.8V, IOUT = 1.72A)
QUICK START PROCEDURE
Figure2. Efficiency (End-to-End)
POWER OVER ETHERNET (PoE) INPUT
1. Disconnect auxiliary supply if it is connected to AUX+
and AUX– inputs of the DC2911A.
2. Refer to Figure3 or Figure4 to evaluate the DC2911A
with a DC/DC converter. If a resistive or an active load
is used to evaluate the DC2911A, use the setup dia-
gram as shown in Figure5.
3. Default class shunt positions are at JP1 and JP2 on
the DC2911A board. In this configuration, any PSE
with enough power will turn on this PD. Choose a
power level from Table1 and select the corresponding
shuntpositions.
4. Connect the output of the LTPoE++ or IEEE
802.3btcompliant PSE to the RJ45 connector (J1) of
the DC2911A using a CAT5e or CAT6 Ethernet cable.
(See Note.)
5. After connection has been established, verify that the
LED (D3) is lit. This indicates the PSE has success-
fully detected and powered the PD.
6. Verify T2P response with a digital multimeter or an
oscilloscope. The T2P response to the type of PSE
connected to the DC2911A is provided in Table2.
Top Side Bottom Side
LOAD CURRENT (A)
0
0.3
0.6
0.9
1.2
1.5
1.8
98.4
98.7
99.0
99.3
99.6
EFFICIENCY (%)
DC2911A F02

3
DEMO MANUAL DC2911A
Rev. 0
Figure3. Setup Diagram for DC2911A with a DC/DC Converter, a Microprocessor, and an IEEE 802.3bt PSE
Figure4. Setup Diagram for DC2911A with a DC/DC Converter, a Microprocessor, and an LTPoE++ PSE
QUICK START PROCEDURE
DC/DC
CONVERTER
PSE TYPE
(TO μP)
OPTO
ENABLE
+
–
VIN
CAT5e
OR CAT6 CABLE
RJ45 RJ45
IEEE802.3bt
PSE
VIN
DC2911A F03
DC/DC
CONVERTER
PSE TYPE
(TO μP)
OPTO
ENABLE
+
–
VIN
CAT5e
OR CAT6 CABLE
RJ45 RJ45
LTPoE++
PSE
VIN
DC2911A F04

4
DEMO MANUAL DC2911A
Rev. 0
Table1. Single-Signature Classification, Power Levels and Jumper Selection
PD REQUESTED CLASS
PD REQUESTED POWER (AT THE PD INPUT)
RCLASS JUMPERSIEEE 802.3 LTPoE++
0 13W JP1 JP2
1 3.84W JP3 JP4
2 6.49W JP5 JP6
3 13W JP7 JP8
4 25.5W JP9 JP10
5 40W 38.7W JP11 JP12
6 51W 52.7W JP13 JP14
7 62W 70W JP15 JP16
8 71.3W 90W JP17 JP18
Table2. T2P Response vs PSE Type
PSE TYPE T2P RESPONSE
1 (PoE, 13W) Logic High
2 (PoE+, 25.5W) Logic Low
3 (PoE++, 51W) 50% Logic Low*
4 (PoE++, 71.3W) 25% Logic Low*
LTPoE++, 90W 75% Logic Low*
* T2P Frequency is 840Hz typical for Type 3, Type 4 and LTPoE++ PSEs
Figure5. Setup Diagram for DC2911A with a Resistive or an Active Load. Do Not Capacitively Load LAB_TEST_VOUT–
QUICK START PROCEDURE
RESISTIVE OR
ACTIVE LOAD
CAT5e
OR CAT6 CABLE
RJ45 RJ45
IEEE802.3bt
PSE
DC2911A F05
USE LAB_TEST_BOUT–
RESISTIVE OR
ACTIVE LOAD

5
DEMO MANUAL DC2911A
Rev. 0
AUXILIARY SUPPLY INPUT
1. Place and connect test equipment (voltmeter, amme-
ter, oscilloscope and electronic load) as shown in
Figure6.
2. Turn down the electronic load to a minimum value
and turn off the electronic load.
3. Connect the output of the auxiliary supply to the
DC2911A as shown in Figure6. Turn on the auxiliary
QUICK START PROCEDURE
supply and set its current limit to 2A. Then increase
its output voltage to 48V.
4. Once the LED (D3) on the DC2911A is lit, check the
output voltage using a voltmeter. Output voltage
should be within 37V to 57V.
5. Verify T2P response with an oscilloscope as shown
in Figure6. The T2P response during auxiliary power
operation is provided in Table3.
Figure6. Setup Diagram for Auxiliary Supply Input
DC/DC
CONVERTER
PSE TYPE
(TO μP)
OPTO
ENABLE
+
–
VIN
VIN
AUXILIARY
DC POWER
SUPPLY
+
–
DC2911A F06
Table3. T2P Response During Auxiliary Power Operation
PD CLASS T2P RESPONSE
0 – 4 Logic Low
5 – 8 75% Logic Low*
* T2P Frequency is 840Hz typical

6
DEMO MANUAL DC2911A
Rev. 0
QUICK START PROCEDURE
Table4. Interoperability (T2P Response*, PSE Allocated Power, Number of Class/Mark Events)
PD REQUESTED CLASS
(PD REQUESTED POWER)
PSE TYPE, CLASS (POWER)
AUXILIARY
POWER
SOURCE**
IEEE 802.3
TYPE 1
IEEE 802.3
TYPE 2
IEEE 802.3
TYPE 3
IEEE 802.3
TYPE 4 LTPoE++
CLASS 3
(13W)
CLASS 4
(25.5W)
CLASS 4
(25.5W)
CLASS 5
(40W)
CLASS 6
(51W)
CLASS 7
(62W)
CLASS 8
(71.3W) (38.7W) (52.7W) (70W) (90W)
CLASS 0−3
(Up to 13W)
Hi-Z
Up to 13W
1-Event
Hi-Z
Up to 13W
1-Event
Hi-Z
Up to 13W
1-Event
Hi-Z
Up to 13W
1-Event
Hi-Z
Up to 13W
1-Event
Hi-Z
Up to 13W
1-Event
Hi-Z
Up to 13W
1-Event
Hi-Z
Up to 13W
1-Event
Hi-Z
Up to 13W
1-Event
Hi-Z
Up to 13W
1-Event
Hi-Z
Up to 13W
1-Event
Low-Z
Aux. Power
N/A
CLASS 4
(25.5W)
Hi-Z
13W
1-Event
Low-Z
25.5W
2-Event
Low-Z
25.5W
3-Event
Low-Z
25.5W
3-Event
Low-Z
25.5W
3-Event
Low-Z
25.5W
3-Event
Low-Z
25.5W
3-Event
Low-Z
25.5W
2-Event
Low-Z
25.5W
2-Event
Low-Z
25.5W
2-Event
Low-Z
25.5W
2-Event
Low-Z
Aux. Power
N/A
CLASS 5
(40W)
Hi-Z
13W
1-Event
Low-Z
25.5W
2-Event
Low-Z
25.5W
3-Event
50%
40W
4-Event
50%
40W
4-Event
50%
40W
4-Event
50%
40W
4-Event
75%
38.7W
3-Event
75%
38.7W
3-Event
75%
38.7W
3-Event
75%
38.7W
3-Event
75%
Aux. Power
N/A
CLASS 6
(51W)
Hi-Z
13W
1-Event
Low-Z
25.5W
2-Event
Low-Z
25.5W
3-Event
Low-Z
25.5W
3-Event
50%
51W
4-Event
50%
51W
4-Event
50%
51W
4-Event
DENIED
75%
52.7W
3-Event
75%
52.7W
3-Event
75%
52.7W
3-Event
75%
Aux. Power
N/A
CLASS 7
(62W)
Hi-Z
13W
1-Event
Low-Z
25.5W
2-Event
Low-Z
25.5W
3-Event
Low-Z
25.5W
3-Event
50%
51W
4-Event
25%
62W
5-Event
25%
62W
5-Event
DENIED DENIED
75%
70W
3-Event
75%
70W
3-Event
75%
Aux. Power
N/A
CLASS 8
(71.3W)
Hi-Z
13W
1-Event
Low-Z
25.5W
2-Event
Low-Z
25.5W
3-Event
Low-Z
25.5W
3-Event
50%
51W
4-Event
50%
51W
4-Event
25%
71.3W
5-Event
DENIED DENIED DENIED
75%
90W
3-Event
75%
Aux. Power
N/A
↓
T2P Response* →
PSE Allocated Power →
Number of Classification Events →
75%
90W
3-Event
Note 1. Shade of blue indicates the PD has been demoted or denied power.
* Specified as the percentage of the period which T2P is low impedance with respect to GND.
** Auxiliary Power Supply must be sized to provide PD Requested Power.

7
DEMO MANUAL DC2911A
Rev. 0
PARTS LIST
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
3 2 C1, C5 CAP., 0.047μF, X7S, 100V, 10%, 0603 TDK, C1608X7S2A473K080AB
4 0 C2 CAP., OPTION, 0402 OPT
5 1 C3 CAP., 0.047μF, X7R, 100V, 10%, 0805 AVX, 08051C473KAT2A
6 1 C4 CAP., 22μF, ALUM., 100V, 20%, SMD 8mm ×10.2mm,
CE-BS SERIES
SUN ELECTRONIC INDUSTRIES CORPORATION,
100CE22BS
1 2 CG1, CG2 CAP., 1000pF, X7R, 2000V, 10% 1808 TDK, C4520X7R3D102K130KA
2 4 CT1, CT2, CT3, CT4 CAP, 0.01μF, X7R, 200V, 10%, 0805 AVX, 08052C103KAZ2A
7 1 D1 DIODE, TVS, 58V, 600W, 2-PIN SOD128, AEC-Q101 NEXPERIA, PTVS58VP1UTP
8 1 D2 DIODE, SCHOTTKY, 100V, 3A, 2-PIN SOD-128, AEC-Q101 NEXPERIA, PMEG10030ELPX
9 1 D3 LED, GREEN, WATER-CLEAR WURTH ELEKTRONIK, 150080VS75000
10 1 D4 DIODE, ZENER, 12V, 200mW, SOD-323 DIODES INC, MMSZ5242BS-7-F
11 7 E1-E7 TEST POINT, TURRET, 0.094 MTG. HOLE MILL-MAX 2501-2-00-80-00-00-07-0
13 2 J1, J2 CONN., MOD JACK, RJ45, FEMALE, R/A THT, 1 PORT, 8P8C STEWART CONN./BEL, SS-7188S-A-NF
12 18 JP1-JP18 CONN., HDR., MALE, 1 × 2, 2mm, THT, STR SULLINS CONNECTOR SOLUTIONS, NRPN021PAEN-RC
14 2 Q1, Q11 XSTR., MOSFET, N-CH, 100V, 36.6mΩ, 30A, 91W, LFPAK33 NEXPERIA, PSMN040-100MSE
15 8 Q3-Q10 XSTR., MOSFET, N-CH, 100V, 71mΩ, 18A, 65W, LFPAK33 NEXPERIA, PSMN075-100MSE
28 1 R10 RES., 52.3k, 1%, 1/10W, 0603 VISHAY, CRCW060352K3FKEA
29 2 R11, R18 RES., 0Ω, 1/10W, 0603 VISHAY, CRCW06030000Z0EA
30 1 R12 RES., 8.2Ω, 1/8W, 1%, 0805 VISHAY, CRCW08058R20FKEA
31 1 R13 RES., 3.3k, 1/10W, 5%, 0603 VISHAY, CRCW06033K30JNEA
32 2 R14, R15 RES., 100k, 1/10W, 5%, 0603 VISHAY, CRCW0603100KJNEA
33 0 R16, R17 RES., OPTION, 0805 OPT
34 1 R19 RES., 30k, 1/10W, 5%, 0603 VISHAY, CRCW060330K0JNEA
27 1 R9 RES., 174k, 1%, 1/10W, 0603 VISHAY, CRCW0603174KFKEA
16 2 RC1, RC6 RES., 1.00k, 1/8W, 1%, 0805 VISHAY, CRCW08051K00FKEA
23 1 RC11 RES., 64.9Ω, 1/8W, 1%, 0805 VISHAY, CRCW080564R9FKEA
24 1 RC13 RES., 118Ω, 1/8W, 1%, 0805 VISHAY, CRCW0805118RFKEA
17 2 RC2, RC8 RES., 140Ω, 1/8W, 1%, 0805 VISHAY, CRCW0805140RFKEA
18 2 RC3, RC10 RES., 76.8Ω, 1/8W, 1%, 0805 VISHAY, CRCW080576R8FKEA
19 2 RC4, RC12 RES., 49.9Ω, 1/8W, 1%, 0805 VISHAY, CRCW080549R9FKEA
20 1 RC5 RES., 34.8Ω, 1/8W, 1%, 0805 VISHAY, CRCW080534R8FKEA
21 1 RC7 RES., 37.4Ω, 1/8W, 1%, 0805 VISHAY, CRCW080537R4FKEA
22 1 RC9 RES., 46.4Ω, 1/8W, 1%, 0805 VISHAY, CRCW080546R4FKEA
25 1 RMPS RES., 3.0k, 5%, 1W, 2512 VISHAY, CRCW25123K00JNEG
26 8 RT1-RT8 RES., 75Ω, 1/10W, 5%, 0603 VISHAY, CRCW060375R0JNEA
38 2 SHUNTS ON JP1
AND JP2
CONN., SHUNT, FEMALE, 2 POS, 2mm WURTH ELEKTRONIK, 60800213421
35 1 T1 XFMR., 350μH, 1:1 ±2% WURTH ELEKTRONIK, 749022016
36 1 U1 I.C., LTPoE++/802.3bt PD CONTROLLER, DFN10, 3mm × 3mm ANALOG DEVICES, LT4293IDD
37 1 U2 I.C., PoE IDEAL DIODE BRIDGE CONTROLLER, QFN16-UF,
4mm × 4mm
ANALOG DEVICES, LT4321IUF
39 2 STENCILS, (TOP & BOTTOM) STENCIL DC2911A-1

8
DEMO MANUAL DC2911A
Rev. 0
SCHEMATIC DIAGRAM
5
5
4
4
3
3
2
2
1
1
D D CC B B A A
37V - 57V
1. ALL RESISTORS AND CAPACITORS ARE 0603 2. ALL RESISTORS TOLERANCE RATING ARE 5% NOTE 1: UNLESS OTHERWISE SPECIFIED
JUMPER SELECTIONS
RCLASS JUMPERS
JP1 JP3 JP5 JP7 JP9 JP11 JP13 JP15 JP17
JP2 JP4 JP6 JP8 JP10 JP12 JP14 JP16 JP18
RCLASS JUMPERS
USE VOUT+ AND VOUT- TERMINALS TO CONNECT TO A PWRGD ENABLED POWER SUPPLY ONLY. USE VOUT+ AND LAB_TEST_VOUT- TERMINALS FOR LAB TESTING WITH ELECTRONIC OR RESISTIVE LOAD ONLY. NOT NEEDED FOR FINAL CIRCUIT.
802.3bt REQ. POWER
40W 51W 62W 71.3W
38.7W 52.7W 70W 90W
LTPoE++ REQ. POWER
13W 3.84W
6.49W 13W 25.5W
PD CLASS
0 1 2 3
4 5
6
7 8
VPORTP
VPORTN
PWRGD
REVISION HISTORY
DESCRIPTION DATEAPPROVEDECO REV
ERIC H.1ST PROTOTYPE 81-92-111
__
REVISION HISTORY
DESCRIPTION DATEAPPROVEDECO REV
ERIC H.1ST PROTOTYPE 81-92-111
__
REVISION HISTORY
DESCRIPTION DATEAPPROVEDECO REV
ERIC H.1ST PROTOTYPE 81-92-111
__
SIZE
DATE:
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TITLE:
APPROVALS
PCB DES.
APP ENG.
CUSTOMER NOTICE
ADI HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT ADI APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO ADI AND
SCHEMATIC
SUPPLIED FOR USE WITH ADI PARTS.
SCALE = NONE
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1 2
IEEE 802.3bt COMPLIANT, LTPoE++
ERIC H.
N/A
LT4293IDD, LT4321IUF DEMO CIRCUIT 2911A
KIM T.
INTEROPERABLE POWERED DEVICE
SIZE
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ADI HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT ADI APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO ADI AND
SCHEMATIC
SUPPLIED FOR USE WITH ADI PARTS.
SCALE = NONE
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1 2
IEEE 802.3bt COMPLIANT, LTPoE++
ERIC H.
N/A
LT4293IDD, LT4321IUF DEMO CIRCUIT 2911A
KIM T.
INTEROPERABLE POWERED DEVICE
SIZE
DATE:
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TITLE:
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PCB DES.
APP ENG.
CUSTOMER NOTICE
ADI HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT ADI APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO ADI AND
SCHEMATIC
SUPPLIED FOR USE WITH ADI PARTS.
SCALE = NONE
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IEEE 802.3bt COMPLIANT, LTPoE++
ERIC H.
N/A
LT4293IDD, LT4321IUF DEMO CIRCUIT 2911A
KIM T.
INTEROPERABLE POWERED DEVICE
D2
PTVS58VP1UTP
2 1
JP14
RMPS 2W 2512 3.0k
R11
0
TP5
JP18
JP1
RC5 34.8
0805 1%
JP3
JP8
RC12 49.9
0805 1%
RC11 64.9
0805 1%
RC8 140
0805 1%
D1
PMEG10030ELPX
21
C3
47nF
X7R 100V 0805S
R16
*
1% 0805S RCLS
R14 100k
RC6 1.00k
0805 1%
C1 0.047uF 100V 0603
JP15
TP1
E7
LAB_TEST_VOUT-
Q1
PSMN040-100MSE
6
4
5 8
71
2
3
JP2
Q11
PSMN040-100MSE
6
4
5 8 7
1
2 3
+
C4 22uF 100V
R19 30k
RC13 118
0805 1%
C2 OPT 0402S
E2
VOUT-
RC3 76.8
0805 1%
RC7 37.4
0805 1%
E5
AUX+
R15 100k
TP3
RC2 140
0805 1%
JP5
R13 3.3k
JP6
U1
LT4293IDD
GND
1
AUX
2
RCLASS
3
RCLASS++
4
GND
5T2P 6
PWRGD 7
HSSRC 8
HSGATE 9
VPORT 10
EP
11
R10 52.3k TP4
E1
VOUT+
JP13
R17 OPT 0805S 1%
RCLS++
JP16
JP17
RC4 49.9
0805 1%
R9 1% 174k
JP10
RC10 76.8
0805 1%
E3
T2P
RC9
0805 1%
46.4
RC1 1.00k
0805 1%
D3 GRN
1 2
JP4
E4
PWRGD
JP7 JP11 JP9
TP2
D4
MMSZ5242BS, 12V
2 1
R12 8.2 0805S
E6
AUX-
JP12
RCLASS++
RCLASS
RCLASS++
RCLASS
VPORTN

9
DEMO MANUAL DC2911A
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog
Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications
subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
SCHEMATIC DIAGRAM
5
5
4
4
3
3
2
2
1
1
D D CC B B A A
OUT TO PHY
37V - 57V
IN FROM PSE
VPORTP
VPORTN
PWRGD
SIZE
DATE:
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APP ENG.
CUSTOMER NOTICE
ADI HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT ADI APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO ADI AND
SCHEMATIC
SUPPLIED FOR USE WITH ADI PARTS.
SCALE = NONE
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IEEE 802.3bt COMPLIANT, LTPoE++
ERIC H.
N/A
LT4293IDD, LT4321IUF DEMO CIRCUIT 2911A
KIM T.
INTEROPERABLE POWERED DEVICE
SIZE
DATE:
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APPROVALS
PCB DES.
APP ENG.
CUSTOMER NOTICE
ADI HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT ADI APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO ADI AND
SCHEMATIC
SUPPLIED FOR USE WITH ADI PARTS.
SCALE = NONE
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2 2
IEEE 802.3bt COMPLIANT, LTPoE++
ERIC H.
N/A
LT4293IDD, LT4321IUF DEMO CIRCUIT 2911A
KIM T.
INTEROPERABLE POWERED DEVICE
SIZE
DATE:
.VER.ONCI
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TITLE:
APPROVALS
PCB DES.
APP ENG.
CUSTOMER NOTICE
ADI HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT ADI APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO ADI AND
SCHEMATIC
SUPPLIED FOR USE WITH ADI PARTS.
SCALE = NONE
www.analog.com
1
Thursday, November 29, 2018
2 2
IEEE 802.3bt COMPLIANT, LTPoE++
ERIC H.
N/A
LT4293IDD, LT4321IUF DEMO CIRCUIT 2911A
KIM T.
INTEROPERABLE POWERED DEVICE
RT6 75
Q8 PSMN075-100MSE
6
4
5
8
7
1
2
3
RT2 75
VPORTP
RT8 75
J2
SS-7188S-A-NF
1
2
3
4
5
6 7
8
910
RT5 75
CT4 0.01uF 100V 0805S
Q9 PSMN075-100MSE
6
4
5
8
7
1
2
3
C5 0.047uF 100V
Q4 PSMN075-100MSE
6
4
5
8
7
1
2
3
CG1 1000pF 2KV 1808
T1
749022016
D- 3
TD 1
X+
14
X-
16
D+ 11
D- 9
D- 6
D+ 8
X-
13
TD 4
D+ 5
D+ 2
TX
15 TD 10
TD 7
D- 12
TX
18
X+
17
X-
19
TX
21
X+
20
X-
22
TX
24
X+
23
CG2 1000pF 2KV 1808
U2
LT4321IUF
TG36
1
IN36
2
IN45
3
TG45
4
TG78
5
IN78
6
BG78
7
BG45
8
OUTP 12
EN 11
EN 10
OUTN 9
TG12 16
IN12 15
BG12 14
BG36 13
EP 17
CT2 0.01uF 100V 0805S
Q3 PSMN075-100MSE
6
4
5
8
7
1
2
3
RT7 75
RT1 75 RT4
75
CT3 0.01uF 100V 0805S
CT1 0.01uF 100V 0805S
Q6 PSMN075-100MSE
6
4
5
8
7
1
2
3
Q7 PSMN075-100MSE
6
4
5
8
7
1
2
3
R18 0
Q5 PSMN075-100MSE
6
4
5
8
7
1
2
3
RT3 75
Q10 PSMN075-100MSE
6
4
5
8
7
1
2
3
J1
SS-7188S-A-NF
1 2
3
4
5
6 7
8
910
TG36 POE_CT36 POE_CT45
TG45
TG12
BG12
TG36
BG36
TG45
BG45
TG78
BG78
POE_CT36 POE_CT45 POE_CT78
VPORTP
VPORTN
TG78
POE_CT78
BG78
BG45
TG12
POE_CT12
BG12
BG36
POE_CT12
POE_CT78
POE_CT45
POE_CT36
POE_CT12

10
DEMO MANUAL DC2911A
Rev. 0
 ANALOG DEVICES, INC. 2019
09/19
www.analog.com
ESD Caution
ESD (electrostatic discharge) sensitive device. Charged devices and circuit boards can discharge without detection. Although this product features patented or proprietary protection
circuitry, damage may occur on devices subjected to high energy ESD. Therefore, proper ESD precautions should be taken to avoid performance degradation or loss of functionality.
Legal Terms and Conditions
By using the evaluation board discussed herein (together with any tools, components documentation or support materials, the “Evaluation Board”), you are agreeing to be bound by the terms and
conditions set forth below (“Agreement”) unless you have purchased the Evaluation Board, in which case the Analog Devices Standard Terms and Conditions of Sale shall govern. Do not use the Evaluation
Board until you have read and agreed to the Agreement. Your use of the Evaluation Board shall signify your acceptance of the Agreement. This Agreement is made by and between you (“Customer”)
and Analog Devices, Inc. (“ADI”), with its principal place of business at One Technology Way, Norwood, MA 02062, USA. Subject to the terms and conditions of the Agreement, ADI hereby grants to
Customer a free, limited, personal, temporary, non-exclusive, non-sublicensable, non-transferable license to use the Evaluation Board FOR EVALUATION PURPOSES ONLY. Customer understands and
agrees that the Evaluation Board is provided for the sole and exclusive purpose referenced above, and agrees not to use the Evaluation Board for any other purpose. Furthermore, the license granted
is expressly made subject to the following additional limitations:Customer shall not (i) rent, lease, display, sell, transfer, assign, sublicense, or distribute the Evaluation Board;and (ii) permit any Third
Party to access the Evaluation Board. As used herein, the term “Third Party”includes any entity other than ADI, Customer, their employees, affiliates and in-house consultants. The Evaluation Board is
NOT sold to Customer;all rights not expressly granted herein, including ownership of the Evaluation Board, are reserved by ADI. CONFIDENTIALITY. This Agreement and the Evaluation Board shall all
be considered the confidential and proprietary information of ADI. Customer may not disclose or transfer any portion of the Evaluation Board to any other party for any reason. Upon discontinuation of
use of the Evaluation Board or termination of this Agreement, Customer agrees to promptly return the Evaluation Board to ADI. ADDITIONAL RESTRICTIONS. Customer may not disassemble, decompile
or reverse engineer chips on the Evaluation Board. Customer shall inform ADI of any occurred damages or any modifications or alterations it makes to the Evaluation Board, including but not limited
to soldering or any other activity that affects the material content of the Evaluation Board. Modifications to the Evaluation Board must comply with applicable law, including but not limited to the RoHS
Directive. TERMINATION. ADI may terminate this Agreement at any time upon giving written notice to Customer. Customer agrees to return to ADI the Evaluation Board at that time. LIMITATION OF
LIABILITY. THE EVALUATION BOARD PROVIDED HEREUNDER IS PROVIDED “AS IS”AND ADI MAKES NO WARRANTIES OR REPRESENTATIONS OF ANY KIND WITH RESPECT TO IT. ADI SPECIFICALLY
DISCLAIMS ANY REPRESENTATIONS, ENDORSEMENTS, GUARANTEES, OR WARRANTIES, EXPRESS OR IMPLIED, RELATED TO THE EVALUATION BOARD INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTY OF MERCHANTABILITY, TITLE, FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS. IN NO EVENT WILL ADI AND ITS
LICENSORS BE LIABLE FOR ANY INCIDENTAL, SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES RESULTING FROM CUSTOMER’S POSSESSION OR USE OF THE EVALUATION BOARD, INCLUDING
BUT NOT LIMITED TO LOST PROFITS, DELAY COSTS, LABOR COSTS OR LOSS OF GOODWILL. ADI’S TOTAL LIABILITY FROM ANY AND ALL CAUSES SHALL BE LIMITED TO THE AMOUNT OF ONE
HUNDRED US DOLLARS ($100.00). EXPORT. Customer agrees that it will not directly or indirectly export the Evaluation Board to another country, and that it will comply with all applicable United States
federal laws and regulations relating to exports. GOVERNING LAW. This Agreement shall be governed by and construed in accordance with the substantive laws of the Commonwealth of Massachusetts
(excluding conflict of law rules). Any legal action regarding this Agreement will be heard in the state or federal courts having jurisdiction in Suffolk County, Massachusetts, and Customer hereby submits
to the personal jurisdiction and venue of such courts. The United Nations Convention on Contracts for the International Sale of Goods shall not apply to this Agreement and is expressly disclaimed.