Analog Devices INEAR TECHNOLOGY DC2583A Quick setup guide

1
dc2583af
DEMO MANUAL DC2583A
Description
LT4294, LT4321
IEEE 802.3bt Powered Device
Demonstration circuit 2583 is an IEEE802.3bt (Draft 2.3)
compliant Power over Ethernet (PoE) powered device
(PD). It features the LT
®
4294 PD interface controller and
the LT4321 PoE ideal diode bridge controller.
The LT4294 provides 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) (57mΩ typical) N-channel FET for the hot
swap function to improve efficiency. Additional features
include power good (PWRGD) and T2P output indica-
tors for interfacing with downstream electronics. The
PWRGD output indicates the PD controller is ready to
provide power to the downstream load. This signal can be
used to enable an isolated power supply. The T2P output
indicates the available power from the power sourcing
L, LT, LTC, LTM, Linear Technology, LTPoE++ and the Linear logo are registered trademarks of
Analog Devices, Inc. All other trademarks are the property of their respective owners.
BoarD photo
equipment (PSE) to the downstream load. This signal can
be used to limit the load and prevent overloading the PSE.
The LT4321 controls eight low RDS(ON) (57mΩ typical)
N-channel FETs to further improve end-to-end power
delivery efficiency and ease thermal design. This solu-
tion replaces the eight diodes typically found in a passive
PoE rectifier bridge.
The DC2583A accepts up to 71W 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 at
http://www.linear.com/demo/DC2583A
Top Side Bottom Side

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dc2583af
DEMO MANUAL DC2583A
typical performance characteristics
Figure 1. Thermal Pictures (Conditions: VPORT = 41.2V, VOUT = 40.8V, IOUT = 1.72A)
Figure 2. Efficiency (End-to-End)
performance summary
Specifications are at TA= 25°C
PARAMETER CONDITIONS MIN TYP MAX UNITS
Port Voltage (VPORT) At RJ45 37 57 V
Auxiliary Voltage From AUX+ to AUX– Terminals 37 57 V
Efficiency VPORT = 48V, IOUT = 1.2A 99.2 %
T2P Switching Frequency 840 Hz
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 (%)
DC2583 F02

3
dc2583af
DEMO MANUAL DC2583A
Quick start proceDure
Power Over Ethernet (PoE) Input
1. Disconnect auxiliary supply if it is connected to AUX+
and AUX– inputs of the DC2583A.
2. Refer to Figure 3 to evaluate the DC2583A with a
DC/DC converter. If a resistive or an active load is
used to evaluate the DC2583A, use the setup diagram
as shown in Figure 4.
3. Default class shunt positions are at JP1 and JP2 on
the DC2583A board. Choose a power level from Table
1 and select the corresponding shunt positions.
Table 1. Single-Signature Classification Codes, Power
Levels and Jumper Selection
PD CLASS
ALLOCATED CLASS
POWER AT THE PD INPUT RCLASS JUMPERS
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 JP11 JP12
6 51W JP13 JP14
7 62W JP15 JP16
8 71W JP17 JP18
*Class 0 is not defined for 802.3bt PDs.
4. Connect the output of the IEEE 802.3bt compliant PSE
(see note) to the RJ45 connector (J1) of the DC2583A
using a CAT5e or CAT6 Ethernet cable.
5. After connection has been established, verify that the
LED (D3) is lit. This indicates the PSE has successfully
detected and powered the PD.
6. Verify T2P response with a digital multimeter or an
oscilloscope. The T2P response for the type of PSE
connected to the DC2583A is provided in Table 2.
Note:An 802.3bt PSE has not yet been released. In
the interim, an LTPoE++
®
compliant PSE (DC1814A-D)
may be used to provide power to the DC2583A. The
LTPoE++ classification will not be 802.3bt compli-
ant, but the PSE will provide a compatible detection
and power output. Specifically, the T2P output of
the DC2583A is different from the behavior stated in
Table2 and will indicate connection to a Type 2 PSE.
Otherwise PD behavior will be unaffected.
Table 2. T2P Response
PSE T2P RESPONSE
NEGOTIATED PD
INPUT POWER
IEEE
Logic High 13W
Logic Low 25.5W
50% Logic High/50% Logic Low,
Toggle at 840Hz (typical)
51W
75% Logic High/25% Logic Low,
Toggle at 840Hz (typical)
71W
LTPoE++, 90W Logic Low 71W

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dc2583af
DEMO MANUAL DC2583A
Figure 3. Setup Diagram for DC2583A with a DC/DC Converter, a Microprocessor and an IEEE 802.3bt PSE
Figure 4. Setup Diagram for DC2583A with a Resistive or an Active Load
Quick start proceDure
DC2583 F03
OPTO
IEEE 802.3bt
PSE LOAD
RJ45 RJ45
CAT5e
OR
CAT6 CABLE
+
VIN
–ENABLE
PSE TYPE
(TO µP)
DC/DC
CONVERTER
DC2583 F04
IEEE 802.3bt
PSE
RJ45 RJ45
CAT5e
OR
CAT6 CABLE
USE LAB_TEST_VOUT–
CONNECTION FOR
RESISTIVE OR ACTIVE LOAD
RESISTIVE OR
ACTIVE LOAD

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dc2583af
DEMO MANUAL DC2583A
Quick start proceDure
Auxiliary Supply Input
1. Place and connect test equipment as shown in Figure 5.
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
DC2583A as shown in Figure 5. Turn on the auxiliary
supply and set its current limit to 2A. Then increase its
output voltage to 48V.
4. Once the LED (D3) on the DC2583A is lit, check the
output voltage using a voltmeter. Output voltage should
be within 37-57V.
5. Verify T2P response with an oscilloscope as shown
in Figure 5. The T2P response during auxiliary power
operation is provided in Table 3.
Figure 5. Setup Diagram for Auxiliary Supply Input
LOAD
DC2583 F05
OPTO
+
VIN
–
+AUXILIARY
DC POWER
SUPPLY
–
ENABLE
PSE TYPE
(TO µP)
DC/DC
CONVERTER
Table 3. T2P Response During Auxiliary Power Operation
PD CLASS T2P RESPONSE
0–4 Logic Low
5–8 75% Logic High/25% Logic Low,
Toggle at 840Hz (typical)

6
dc2583af
DEMO MANUAL DC2583A
parts list
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Required Circuit Components
1 2 C1, C5 CAP., 0.047µF, X7S, 100V, 10%, 0603 TDK, C1608X7S2A473K080AB
2 0 C2 CAP., OPTION, 0402 OPT
3 1 C3 CAP., 0.047µF, X7R, 100V, 10%, 0805 AVX, 08051C473KAT2A
4 1 CG1 CAP., 1000pF, X7R, 2000V, 10%, 1808 TDK, C4520X7R3D102K130KA
5 4 CT1, CT2, CT3, CT4 CAP, CER, X7R 0.01µF 200V 10%, 0805 AVX, 08052C103KAZ2A
6 1 D2 DIODE, TVS, 58V, 600W, SOD128 NEXPERIA, PTVS58VP1UTP
7 1 D1 DIODE, SCHOTTKY, 100V, 3A NEXPERIA, PMEG10030
8 1 J1 CONN., MOD. JACK, FEMALE, 2.54mm, 8TERMINAL, 1 PORT,
R/A THRU-HOLE
STEWART CONNECTOR, SS-7188S-A-NF
9 2 Q1, Q11 MOSFET, N-CH, 100V, 36.6mΩ, 30A, 91W, LFPAK33 NEXPERIA, PSMN040-100MSE
10 8 Q3, Q4, Q5, Q6, Q7, Q8,
Q9, Q10
MOSFET, N-CH, 100V, 71mΩ, 18A, 65W, LFPAK33 NEXPERIA, PSMN075-100MSE
11 1 R9 RES., 174k, 1%, 0603 NIC, NRC06F1743TRF
12 1 R10 RES., 52.3k, 1%, 0603 NIC, NRC06F5232TRF
13 2 R11, R18 RES., 0Ω, 1/10W, 0603 VISHAY, CRCW06030000Z0EA
14 1 R12 RES., 8.2Ω, 1/5W, 5%, 0805 NIC, NRC10J8R2TRF
15 1 R13 RES., 3.3k , 1/10W, 5%, 0603 VISHAY, CRCW06033K30JNEA
16 2 R14, R15 RES., 100k, 1/10W, 5%, 0603 VISHAY, CRCW0603100KJNEA
17 0 R16, R17 RES., OPT, 0805 OPT
18 2 RC1, RC6 RES., 1.00k, 1/8W, 1%, 0805 VISHAY, CRCW08051K00FKEA
19 2 RC2, RC8 RES., 140Ω, 1/8W, 1%, 0805 VISHAY, CRCW0805140RFKEA
20 2 RC3, RC10 RES., 76.8Ω, 1/8W, 1%, 0805 VISHAY, CRCW080576R8FKEA
21 2 RC4, RC12 RES., 49.9Ω, 1/8W, 1%, 0805 VISHAY, CRCW080549R9FKEA
22 1 RC5 RES., 34.8Ω, 1/8W, 1%, 0805 VISHAY, CRCW080534R8FKEA
23 1 RC7 RES., 37.4Ω, 1/8W, 1%, 0805 VISHAY, CRCW080537R4FKEA
24 1 RC9 RES., 46.4Ω, 1/8W, 1%, 0805 PANASONIC, ERJ-6ENF46R4V
25 1 RC11 RES., 64.9Ω, 1/8W, 1%, 0805 VISHAY, CRCW080564R9FKEA
26 1 RC13 RES., 118Ω, 1/8W, 1%, 0805 VISHAY, CRCW0805118RFKEA
27 4 RT1, RT2, RT3, RT4 RES., 75Ω, 1/10W, 5%, 0603 VISHAY, CRCW060375R0JNEA
28 1 T1 TRANSFORMER, ETHERNET, 749022016 WURTH ELEKTRONIK, 749022016
29 0 T4 (ALTERNATE) TRANSFORMER, ETHERNET, EPG4260S-LF PCA EPG4260S-LF
30 0 T4 (ALTERNATE) TRANSFORMER, ETHERNET, ETH1-460LD COILCRAFT ETH1-460LD
31 1 U1 I.C., IEEE 802.3bt PD CONTROLLERS, DFN10, 3mm x 3mm LINEAR TECH., LT4294IDD#PBF
32 1 U2 I.C., PoE IDEAL DIODE BRIDGE CONTROLLER, QFN16-UF,
4mm x 4mm
LINEAR TECH., LT4321IUF#PBF

7
dc2583af
DEMO MANUAL DC2583A
parts list
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Hardware: For Demo Board Only
1 1 C4 CAP., ALUM. ELECT., 22µF, 100V, 20% SUN ELECTRONIC, 100CE22BS
2 1 CG2 CAP., 1000pF, X7R, 2000V, 10%, 1808 TDK, C4520X7R3D102K130KA
3 1 D3 LED, GREEN, 560nm, 3x2mm, 1206 ROHM, SML-010FTT86L
4 1 D4 DIODE, 12V, 200mW, SOD-323 DIODES INC, MMSZ5242BS-7-F
5 7 E1, E2, E3, E4, E5, E6, E7 TURRET, 0.094" MTG. HOLE MILL-MAX 2501-2-00-80-00-00-07-0
6 1 J2 CONN., MOD. JACK, FEMALE, 2.54mm, 8TERMINAL, 1 PORT,
R/A THRU-HOLE
STEWART CONNECTOR, SS-7188S-A-NF
7 18 JP1-JP18 CONN., HEADER, 1X2, 2mm SULLINS, NRPN021PAEN-RC
8 1 R19 RES., 30k, 1/10W, 5%, 0603 VISHAY, CRCW060330K0JNEA
9 1 RMPS1 RES., 3.0k, 2W, 1%, 2512 TE CONNECTIVITY 35213K0FT
10 4 RT5, RT6, RT7, RT8 RES., 75Ω, 1/10W, 5%, 0603 VISHAY, CRCW060375R0JNEA
11 2 XJP1, XJP2 SHUNT, 2mm SAMTEC, 2SN-BK-G
12 1 PCB, DC2583A DEMO CIRCUIT 2583A
13 2 STENCILS, DC2583A (TOP & BOTTOM) STENCIL DC22583A

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dc2583af
DEMO MANUAL DC2583A
schematic Diagram
37V - 57V
DEMO CIRCUIT 2583A
1. ALL RESISTORS AND CAPACITORS ARE 0603 2. ALL RESISTORS TOLERANCE RATING ARE 5%
NOTE 1: UNLESS OTHERWISE SPECIFIED
JUMPER SELECTIONS
PD CLASS RCLASS JUMPERSPOWER
0 1 2 3 4 5 6 7 8
13W 3.84W 6.49W 13W 25.5W 40W 51W 62W 71W
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.
VPORTP
VPORTN
PWRGD
SIZE
DATE:
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PCB DES.
APP ENG.
TECHNOLOGY Fax: [phone]
Milpitas, CA 95035 Phone: [phone] McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY 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 LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
1
Wednesday, May 24, 2017
1 2
IEEE 802.3bt POWERED DEVICE
KAUNG H.
KAUNG H.
N/A
LT4294IDD, LT4321IUF
SIZE
DATE:
.VER.ONCI
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: [phone]
Milpitas, CA 95035 Phone: [phone] McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY 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 LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
1
Wednesday, May 24, 2017
1 2
IEEE 802.3bt POWERED DEVICE
KAUNG H.
KAUNG H.
N/A
LT4294IDD, LT4321IUF
SIZE
DATE:
.VER.ONCI
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: [phone]
Milpitas, CA 95035 Phone: [phone] McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY 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 LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
1
Wednesday, May 24, 2017
1 2
IEEE 802.3bt POWERED DEVICE
KAUNG H.
KAUNG H.
N/A
LT4294IDD, LT4321IUF
REVISION HISTORY
DESCRIPTION DATEAPPROVEDECO REV
KAUNG H.PRODUCTION 71-42-501
__
REVISION HISTORY
DESCRIPTION DATEAPPROVEDECO REV
KAUNG H.PRODUCTION 71-42-501
__
REVISION HISTORY
DESCRIPTION DATEAPPROVEDECO REV
KAUNG H.PRODUCTION 71-42-501
__
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
08051%
RC8 140
0805 1%
D1
PMEG10030ELPX
2 1
C3
47nF
X7R 100V 0805
R16* 1%
0805
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
D3
LED
12
+
C4
22uF
100V
R19 30K
RC13 118
08051%
C2 OPT 0402
E2
VOUT-
RC3 76.8
0805 1%
RC7 37.4
08051%
E5
AUX+
R15
100K
TP3
RC2 140
0805 1%
JP5
R13 3.3K
JP6
R10
52.3K
U1
LT4294IDD
GND
1
AUX
2
RCLASS
3
RCLASS++
4
GND
5T2P 6
PWRGD 7
HSSRC 8
HSGATE 9
VPORT 10
GND
11
TP4
E1
VOUT+
JP13
R17 OPT 0805 1% RCLS++
JP16
JP17
RC4 49.9
0805 1%
R9 1% 174K JP10
RC10 76.8
0805 1%
E3
T2P
RC9
08051%
46.4
RC1 1.00K
0805 1%
JP4
E4
PWRGD
JP7
JP11 JP9
TP2
D4
MMSZ5242BS, 12V
2 1
R12 8.2 0805
E6
AUX-
JP12
RCLASS++
RCLASS
PWRGD
VPORTN
RCLASS
RCLASS++
PWRGD

9
dc2583af
DEMO MANUAL DC2583A
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
schematic Diagram
A
DEMO CIRCUIT 2583A
NOTE 2: UNLESS OTHERWISE SPECIFIED 1. ALL RESISTORS AND CAPACITORS ARE 0603 2. ALL RESISTORS TOLERANCE RATING ARE 5%
OUT TO PHY
37V-57V
IN FROM PSE
VPORTP
VPORTN
PWRGD
SIZE
DATE:
.VER.ONCI
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: [phone]
Milpitas, CA 95035 Phone: [phone] McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY 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 LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
1
Wednesday, May 24, 2017
2 2
IEEE 802.3bt POWERED DEVICE
KAUNG H. KAUNG H.
N/A
LT4294IDD, LT4321IUF
SIZE
DATE:
.VER.ONCI
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: [phone]
Milpitas, CA 95035 Phone: [phone] McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY 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 LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
1
Wednesday, May 24, 2017
2 2
IEEE 802.3bt POWERED DEVICE
KAUNG H. KAUNG H.
N/A
LT4294IDD, LT4321IUF
SIZE
DATE:
.VER.ONCI
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: [phone]
Milpitas, CA 95035 Phone: [phone] McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY 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 LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
1
Wednesday, May 24, 2017
2 2
IEEE 802.3bt POWERED DEVICE
KAUNG H. KAUNG H.
N/A
LT4294IDD, LT4321IUF
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 0805
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
CT2
0.01uF
100V 0805
Q3
PSMN075-100MSE
6
4
5
8
7
1
2
3
RT7 75
RT1 75 RT4
75
CT3
0.01uF
100V 0805
EP
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
BG1214
BG3613
17
OUTN
CT1
0.01uF
100V 0805
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
POE_CT12
VPORTP
VPORTN
TG78
POE_CT78
BG78
BG45
TG12
POE_CT12
BG12
BG36
POE_CT12
POE_CT78
POE_CT45
POE_CT36

10
dc2583af
DEMO MANUAL DC2583A
 LINEAR TECHNOLOGY CORPORATION 2017
LT 0517 • PRINTED IN USA
DEMONSTRATION BOARD IMPORTANT NOTICE
Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions:
This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT
OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete
in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety
measures typically found in finished commercial goods. As a prototype, this product does not fall within the scope of the European Union
directive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations.
If this evaluation kit does not meet the specifications recited in the DEMO BOARD manual the kit may be returned within 30 days from the date
of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU
OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS
FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS INDEMNITY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR
ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.
The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user releases LTC from all claims
arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and all
appropriate precautions with regard to electrostatic discharge. Also be aware that the products herein may not be regulatory compliant or
agency certified (FCC, UL, CE, etc.).
No License is granted under any patent right or other intellectual property whatsoever. LTC assumes no liability for applications assistance,
customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind.
LTC currently services a variety of customers for products around the world, and therefore this transaction is not exclusive.
Please read the DEMO BOARD manual prior to handling the product. Persons handling this product must have electronics training and
observe good laboratory practice standards. Common sense is encouraged.
This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact a LTC application
engineer.
Mailing Address:
Linear Technology
1630 McCarthy Blvd.
Milpitas, CA 95035
Copyright © 2004, Linear Technology Corporation

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