DEMO MANUAL DC2046A-A
LT4276, LT4321
PoE PD with Synchronous
Flyback and Ideal Diode Bridge
DESCRIPTION
Demonstration circuit 2046A-A is an Ethernet Alliance™
certified PoE powered device (PD) with an isolated power
supply using synchronous flyback topology, featuring the
LT®4276 and ideal diode bridge controller (LT4321).
sized power supply that utilizes a highly efficient flyback
topology with synchronous rectification. The LT4321
provides further efficiency improvement by minimizing
the bridge losses.
The LT4276 provides IEEE802.3af (PoE, Type 1),
IEEE802.3at (PoE+, Type 2), and LTPoE++™ PD interfacing
and power supply control. When the PD is fully powered,
the PD interface switches power over from the power
sourcing equipment (PSE) to the switcher through an
external, low resistance, high power N-channel FET. The
highly integrated LT4276 controls a high power, small-
The DC2046A-A supplies a 3.3V output at up to 6.8A. It
also demonstrates the use of an optional auxiliary power
supply input of 48V. When present, the auxiliary supply
becomes the dominant supply over PoE to provide power.
PERFORMANCE SUMMARY
Design files for this circuit board are available.
All registered trademarks and trademarks are the property of their respective owners.
Specifications are at TA = 25°C
PARAMETER
CONDITIONS
VALUE
Port Voltage (VPORT)
At Ethernet Port
37V to 57V
Auxiliary Voltage
From AUX+ to AUX– Terminals
37V to 57V
Output Voltage
3.3V (Typ)
Output Current
6.8A (Max)
VPORT = 42.5V, IOUT = 6.8A
Output Voltage Ripple
25mVP-P (Typ)
Output Regulation
±0.15% (Typ)
VPORT = 50V, IOUT = 6.8A, End to End
Efficiency
Switching Frequency
90% (Typ)
250kHz (Typ)
BOARD PHOTOS
Top Side
Bottom Side
Rev A
1
DEMO MANUAL DC2046A-A
TYPICAL PERFORMANCE CHARACTERISTICS
Top Side
Bottom Side
Figure 1. Thermal Pictures, VPORT = 57V, IOUT = 6.8A
92
3.6
90
88
3.5
84
VOUT (V)
EFFICIENCY (%)
86
82
80
3.4
3.3
78
76
72
0.7
3.2
VPORT = 42.5V
VPORT = 50V
VPORT = 57V
74
1.4
2.1
2.8 3.5 4.2 4.9
LOAD CURRENT (A)
5.6
6.3
7
dc2047a F02
Figure 2. Efficiency (End to End)
3.1
0.7
VPORT = 42.5V
VPORT = 50V
VPORT = 57V
1.4
2.1
2.8 3.5 4.2 4.9
LOAD CURRENT (A)
5.6
6.3
7
dc2047a F03
Figure 3. Output Voltage Regulation
Rev A
2
DEMO MANUAL DC2046A-A
TYPICAL PERFORMANCE CHARACTERISTICS
Figure 4. Stresses (VPORT = 57V, 3.3V/ 6.8A)
Figure 5. Output Voltage Ripple (VPORT = 42.5V, 3.3V/6.8A)
Figure 6. Load Transient Response (VPORT = 42.5V, 3.8A
to 6.8A to 3.8A)
Figure 7. Gain and Phase Margin of the Flyback Loop
(VPORT = 42.5V, 3.3V/0.7A)
Rev A
3
DEMO MANUAL DC2046A-A
QUICK START PROCEDURE
Demonstration circuit 2046A-A is easy to set up to evaluate the performance of the LT4276 in a PoE+ application.
Refer to Figure 8 for proper equipment setup and follow
the procedure below:
NOTE: When measuring the input or output voltage ripple,
care must be taken to avoid a long ground lead on the
oscilloscope probe. Measure the output voltage ripple by
touching the probe tip and probe ground directly across
the +VOUT and –VOUT terminals. See Figure 9 for proper
scope probe technique.
1. Place test equipment (voltmeter, ammeter, power supplies, and electronic load) as shown in Figure 8.
b. Or, connect a 37V to 57V capable power supply (power
supply in Figure 8) across VPORTP and VPORTN.
c. If evaluating the auxiliary power supply (auxiliary
supply in Figure 8), connect a 37V to 57V capable
power supply across AUX+ to AUX–.
3. Check for the proper output voltage of 3.3V.
4. Once the proper output voltage is confirmed, adjust the
load within the operating range and observe the output
voltage regulation, ripple voltage, efficiency, and other
parameters.
2. Input supplies:
a. Connect a PoE+ capable PSE with a CAT-5 cable to
the RJ45 connector, J1. See Figure 8.
(408) 432-1900
www.analog.com
Figure 8. Proper Measurement Equipment Setup
Figure 9. Measurement Input or Output Ripple
Rev A
4
DEMO MANUAL DC2046A-A
PARTS LIST
ITEM
QTY
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
Cap, Cer, X7R 1000pF 2kV 10% 1808
Murata GR442QR73D102KW01L
DC2046A General BOM
1
1
CG1
2
1
CG2
Cap, Cer, X7R 0.01µF 100V 20% 1206
AVX 12061C103AT2A
3
0
C1
Cap, Cer, OPT 2kV 1812
OPT
4
0
C5
Cap, Cer, X7U OPT 6.3V 10% 1210
OPT
5
1
C6
Cap, Elec, 10µF 100V 10% 6.3x7.7
SunCon 100CE10BS
6
1
C7
Cap, Cer, X7R 2.2µF 100V 10% 1210
Murata GRM32ER72A225KA35
7
1
C10
Cap, Cer, X7R 10nF 100V 20% 0603
Murata GRM188R72A103KA01D
8
1
C11
Cap, Cer, X7R 0.047µF 100V 20% 0603
KEMET C0603C473M1RACTU
9
1
C12
Cap, Cer, X7R 0.047µF 100V 10% 0805
Murata GRM21BR72A473KA01L
10
1
C13
Cap, Cer, X7R 10µF 10V 10% 1206
Murata GRM31CR71A106KA01L
11
0
C15, C18, C19,
C21
Cap, Cer, X5R OPT 2kV 20% 1812
OPT
12
1
C17
Cap, Cer, X7R 1µF 25V 10% 0603
Murata GRM188R71E105KA12
13
1
C20
Cap, Cer, X7R 2.2nF 25V 10% 0603
Murata GRM188R71E222KA01
14
1
C23
Cap, Cer, X7R 4.7nF 2kV 10% 1812
Murata GR443DR73D472KW01L
15
1
C26
Cap, Cer, X5R 100pF 16V 10% 0402
AVX 0402YC101KAT2A
16
0
C27
Cap, Cer, X7R OPT 6.3V 10% 0402
OPT
17
1
D1
Diode, Schottky, B2100 100V SMB
Diodes Inc B2100-13-F
18
1
D2
Diode, TVS, PTVS58VS1UR 58V SOD123
NXP PTVS58VS1UR
19
1
D3
Diode, Zener, MMSZ5252BS 24V SOD323
Diodes Inc MMSZ5252BS
20
1
D4
Diode, LED Green
ROHM SML-010FTT86L
21
1
D13
Diode, Schottky, NXP, BAT46W 100V SOD323
NXP BAT46WJ,115
22
1
D15
Diode, Diode Inc, BAV19WS 120V SOD323
Diodes Inc BAV19WS
23
1
D16
Diode, TVS, PTVS58VS1UR 58V SOD123
NXP PTVS58VS1UR
24
1
D17
Diode, Schottky, BAT54WS 30V SOD323
Diodes Inc BAT54WS
25
1
D19
Diode, TVS, PTVS58VS1UR 58V SOD123
NXP PTVS58VS1UR
26
7
E1, E2, E3, E4,
E9, E10, E12
TP, Turret, PAD150-094 0.094"
MILL-MAX 2501-2-00-80-00-00-07-0
27
1
J1
Conn, Integrated Jack, 7499511001
Würth 7499511001
28
1
J2
Conn, RJ45 Jack, SS-6488-NF-K1
Stewart Connector SS-6488-NF-K1
Alternate SS-6488S-A-NF
29
1
L2
IND, 10µH
Coilcraft DO1608C-103
30
1
L4
IND, 100µH
Coilcraft DO1608C-104
31
9
Q1, Q11, Q12,
Q13, Q14, Q15,
Q16, Q17, Q18
MOSFET, N-CH, PSMN075-100MSE 100V LFPAK33
NXP PSMN075-100MSE
32
1
Q5
Transistor, PNP, MMBT3906 40V SOT23
Fairchild MMBT3906
33
1
Q6
Transistor, NPN, MMBT3904 40V SOT23
Fairchild MMBT3904
34
1
Q7
Transistor, PNP, FMMT723 100V SOT23
Diodes Inc FMMT723TA
34
0
Q7 (Alternate)
Transistor, PNP, PBSS9110T 100V SOT23
NXP PBSS9110T
35
4
RT1, RT2, RT3,
RT4
Res, Chip, 75 5% 0603
NIC NRC06J750TRF
Rev A
5
DEMO MANUAL DC2046A-A
PARTS LIST
ITEM
QTY
36
1
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
R5
Res, Chip, 8.2 5% 0805
NIC NRC10J8R2TRF
37
1
R6
Res, Chip, 3.3K 5% 0603
NIC NRC06J332TRF
38
1
R7
Res, Chip, 20Ω 5% 0805
VISHAY CRCW080520R0JNEA
39
1
R12
Res, Chip, 0 5% 0603
NIC NRC06ZOTRF
40
1
R13
Res, Chip, 100 5% 0603
VISHAY CRCW0603100RFKEA
41
1
R15
Res, Chip, 15 5% 0603
NIC NRC06J150TRF
42
1
R17
Res, Chip, 2k 1% 0603
NIC NRC06F2001TRF
43
1
R18
Res, Chip, 10k 5% 0603
YAGEO RC0603JR-0710KL
44
1
R21
Res, Chip, 174k 1% 0603
VISHAY CRCW0603174KFKEA
45
1
R22
Res, Chip, 107k 1% 0603
NIC NRC06F1073TRF
46
1
R27
Res, Chip, 0 5% 0402
NIC NRC04ZOTRF
47
1
R28
Res, Chip, 0 5% 0603
NIC NRC06ZOTRF
48
1
R29
Res, Chip, 52.3k 1% 0603
VISHAY CRCW060352K3FKEA
49
0
R32
Res, Chip, OPT 5% 1812
OPT
50
1
T3
XFMR, SMD Gate Drive, PE-68386NL
PULSE PE-68386NL
50
0
T3 (Alternate)
XFMR, SMD Gate Drive, EPA4271GE
PCA EPA4271GE
51
0
T4
XFMR, SMD Gate Drive, OPT
OPT
52
1
U3
IC, PoE Ideal Bridge Controller, LT4321IUF QFN16
ANALOG DEVICES LT4321IUF
DC2046A-A BOM
1
1
C2
Cap, Cer, X7R 22µF 6.3V 10% 1206
Murata GRM31CR70J226KE19
2
1
C3
Cap, Cer, X7R 22µF 6.3V 10% 1206
Murata GRM31CR70J226KE20
3
1
C4
Cap, Elec, 68µF 4V 20% 5.0X5.3
Panasonic 4SVPA68MAA
4
1
C8
Cap, Cer, U2J 1nF 630V 5% 1206
Murata GRM31A7U2J222JW31
5
1
C9
Cap, Cer, U2J 100pF 630V 5% 1206
Murata GRM31A7U2J101JW31
6
1
C16
Cap, Cer, X7R 1µF 25V 10% 0805
Murata GRM21BR71E105KA99L
7
1
C22
Cap, Cer, X7R 4.7nF 25V 10% 0603
Murata GRM18871E472KA01D
8
1
C24
Cap, Cer, X7R 0.1µF 25V 20% 0603
Murata GRM188R71E104KA01D
9
1
C25
Cap, Cer, X7R 470pF 25V 5% 0603
AVX 06033A471JAT2A
10
1
D18
Diode, Diode Inc, B0540WS-7 40V SOD323
Diode Inc B0540WS-7
11
1
E11
TP, Turret, PAD150-094 0.094"
MILL-MAX 2501-2-00-80-00-00-07-0
12
1
L1
IND, 180nH
Coilcraft DO1813P-181HC
13
1
L3
IND, CMC, 3.3mH
Würth 744 272 332
13
0
L3 (Alternate)
IND, CMC, 3.3mH
PCA EPA4411
14
1
Q2
MOSFET, N-CH, PSMN2R4-30MLD 30V LFPAK33
NXP PSMN2R4-30MLD
15
0
Q3
MOSFET, N-CH, OPT SOT23
OPT
16
1
Q4
MOSFET, N-CH, 200V TDSON-8
Infineon BSZ900N20NS3
17
1
R2
Res, Chip, 360 5% 0805
NIC NRC10J381TRF
18
1
R3
Res, Chip, 200 5% 1206
Vishay CRCW1206200RFKEA
19
1
R4
Res, Chip, 200 5% 1206
Vishay CRCW1206200RFKEA
20
1
R8
Res, Chip, 5.1 5% 1206
NIC NRC12J5R1TRF
Rev A
6
DEMO MANUAL DC2046A-A
PARTS LIST
ITEM
QTY
21
0
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
R9
Res, Chip, OPT 5% 1206
OPT
22
1
R10
Res, Chip, 6.49k 1% 0603
Vishay CRCW06036K49FKEA
23
1
R11
Res, Chip, 6.81k 1% 0603
Vishay CRCW06036K81FKEA
24
1
R14
Res, Chip, 40m 1% 1206
Vishay WSL1206R0400FEA
25
0
R16
Res, Chip, OPT, Shunt, 0805
OPT
26
0
R19
Res, Chip, OPT 1% 0805
OPT
27
1
R20
Res, Chip, 35.7Ω 1% 0805
Vishay CRCW080535R7FKEA
28
0
R23
Res, Chip, OPT 5% 0603
OPT
29
1
R24
Res, Chip, 8.25k 1% 0603
Vishay CRCW06038K25FKEA
30
1
R25
Res, Chip, 47k 5% 0603
NIC NRC06J473TRF
31
1
R26
Res, Chip, 10k 5% 0603
YAGEO RC0603JR-0710KL
32
1
R30
Res, Chip, 47Ω 5% 0805
Vishay CRCW080547R0JNEA
33
0
R31
Res, Chip, OPT, Shunt, 2512
OPT
34
1
T1
XFMR, Flyback Tran, 750310743
Würth 750310743
34
0
T1 (Alternate)
XFMR, Flyback Tran, EPC3408G
PCA EPC3408G
35
0
T2
XFMR, Flyback Tran, OPT
OPT
36
1
U1
IC, PD & Switcher Controller, LT4276BIUFD QFN28
ANALOG DEVICES LT4276BIUFD
37
1
U2
38
1
OPTO, MOC207 SO8
Fairchild MOC207M
FAB, Printrd Circuit Board
Demo Circuit 2046A
Rev A
7
A
B
C
D
REV
4
E4
VAUX_P
AUX-
GND
VPORTN
VPORTN
5
R32
OPT
E10
E12
E9
37V-57V
VPORTP
VPORTP
VPORTP
DATE
4
1
3.3mH
744272332
L3
1-7-2015
3
2
2
VPRI_SW3
VPRI_P 4
T2
*
6
5
8
7
VSEC_SW
VSEC_P
OPTIONAL COMPONENTS
C21
OPT
C19
OPT
VSEC_P VAUX_P 1
37V-57V
E1
KAUNG H.
PRODUCTION
AUX+
APPROVED
DESCRIPTION
R29
52.3K
R21
174K
C26
100pF
0402
25V
0.047uF
100V
C12
D1
B2100
1
Q1
PSMN075-100MSE
3
2
1
R5
8.2
0805
8
7
6
5
4
3
OPT
T4
4
1
VSEC_SG
ASSEMBLY VERSION
DC2046A-A
DC2046A-B
DC2046A-C
DC2046A-D
DC2046A-E
DC2046A-F
VPRI_SG2
C18
OPT
C15
OPT
2
OUTPUT
3.3V/6.8A
5V/4.7A
12V/1.9A
24V/0.95A
5V/7A
5V/2.3A
R17
2.00K
RCLASS
RCLASS++
AUX
FB31
D17
BAT54WS
U1
LT4276BIUFD
LT4276BIUFD
LT4276BIUFD
LT4276BIUFD
LT4276AIUFD
LT4276CIUFD
R20
35.7
0805
R19
4
3
2
14
U1
LT4276BIUFD
R10
6.49K
10uF
100V
6.3x7.7
Coilcraft
DO1608C-103
+C6
L2
10uH
HSS
OPT
0805
PG
D16
PTVS58VS1UR
C10
10nF
0603
100V
R6
3.3K
4
1
1
2
ECO
4
28
VPORT
26
HSGATE
3
Q7
FMMT723
R11
6.81K
VCC
L4
DO1608C-104
C13 100uH
10uF
1206
10V
C7
2.2uF
100V
1210
X7R
3
2
3
1
2
D15
BAV19WS
1
R7
20
0805
exposed pad, solder side
107K
R22
ITHB
ISEN-
ISEN+
SG
OPT
R23
13
16
17
R27
0402
0
8.25K
R24
4.7nF
C22
C27
OPT
0402
4
3
T3
10K
R26
470pF
C25
1uF
C17
1
VPRI_SG
2
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
C23
4.7nF
2KV
5
7
6
SCALE = NONE
2
C20
2.2nF
R8
5.1
1206
C8
1nF
1206
D13
2
BAT46WJ,115
3
Q5
MMBT3906
4
10K
R18
15
R15
2
47K
R25
E2
T2P
___
E3
D4
LED
R2
360
-VOUT
3.3V/6.8A
+VOUT
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
E11
C16
1uF
0805
25V
R16
OPT
0805
+VOUT
+VOUT
R30
47
0805
1
DATE:
N/A
SIZE
1
SHEET 1
LT4276BIUFD, LT4321IUF
DEMO CIRCUIT 2046A-A
Wednesday, April 01, 2015
IC NO.
4
OF 2
REV.
HIGH EFFICIENCY POE PD INTERFACE WITH INTEGRATED SWITCHING REGULATOR
3
C5
OPT
+VOUT
D18
B0540WS-7
68uF
4V
4SVPA68MAA
+C4
Q6
MMBT3904
Q2
PSMN2R4-30MLD
C3
22uF
X7R
6.3V
1206
L1
180nH
COILCRAFT
DO1813P-181HC
R31
OPT
2512
TITLE: SCHEMATIC
6VSEC_SG
4
C2
22uF
X7R
6.3V
1206
VSEC_P
VSEC_SW
APPROVALS
U2
MOC207
1
3
PE-68386NL
R14
40m
1206
100
R13
R9
OPT
1206
6
7
8
10
9
1
5
Q4
BSZ900N20NS3
VPRI_SW
R4
200
1206
VAUX_P
C9
100pF
1206
R3
200
1206
CUSTOMER NOTICE
C24
0.1uF
R12
0
OPT
1
Q3
D19
PTVS58VS1UR
VPRI_P
T1
750310743
C1
OPT
2
2
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
PCB DES. K. HTOO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APP ENG. K. HTOO
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
VCC
1
20 PG
5
1
2
T2P
5
VCC
VCC
VCC
VCC
6
7
8
9
NC
DNC
GND
GND_EP
GND
27
22
19
29
1
25
HSSRC
12
FFSDLY
21
VCC
23
SWVCC
SFST
11
3
2
2
18
SG
24
VIN
ROSC
10
PG
RLDCMP
15
1
5
6
7
8
1
2
3
8
7
6
5
3
2
1
1
2
2
1
8
1
REVISION HISTORY
A
B
C
D
DEMO MANUAL DC2046A-A
SCHEMATIC DIAGRAM
Rev A
A
B
C
D
IN FROM
PoE+
PSE
CG2
0.01uF
100V
1206
J1
SHIELD
SHIELD
5
Q12
DATA1-1
Q11
7499511001
18
17
8
7
5
4
6
3
2
Q14
PSMN075-100MSE
4BG12
Q13
DATA1-2
PSMN075-100MSE
4TG12
1nF 2kV
TRD1-
11
4TG36
13
14
15
16
9
7
8
2
1
3
5
6
4
10
12
Q15
Q16
DATA2-1
4
PSMN075-100MSE
4BG36
DATA1-1
DATA1-2
DATA2-1
DATA2-2
DATA1-1
DATA1-2
DATA2-1
DATA2-2
RT1
75
RT3
75
CG1
1000pF
1808
2KV
RT2
75
RT4
75
1
2
3
4
5
6
7
8
SS-6488S-A-NF
J2
3
4BG45
PSMN075-100MSE
Q18
DATA2-2
PSMN075-100MSE
4TG45
Q17
PSMN075-100MSE
4BG78
PSMN075-100MSE
4TG78
3
VPORTN
VPORTP
3
4
TG45
TG45
IN45
IN36
TG36
OUT
TO
PHY
BG12
EP
9
17
10
11
VPORTP
VPORTN
CUSTOMER NOTICE
OUTN
OUTN
EN
EN
OUTP
12
0
R28
APPROVALS
D3
MMSZ5252BS
24V
2
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.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
2
SCALE = NONE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
PCB DES. K. HTOO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APP ENG. K. HTOO
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
2
DATA2-1
1
DATA1-2
TG36
U3
LT4321IUF
PoE IDEAL DIODE BRIDGE
PSMN075-100MSE
VC1
VC2
VC3
VC4
TRD4-
TRCT4
TRD4+
TRD3-
TRCT3
TRD3+
TRD2-
TRCT2
TRD2+
4 X 75 Ohms
4 X 12nF
TRD1+
TRCT1
4
9
10
1
8
7
6
5
3
2
1
8
7
6
5
3
2
1
8
7
6
5
3
2
1
8
7
6
5
3
2
1
8
7
6
5
3
2
1
8
7
6
5
3
2
1
8
7
6
5
3
2
1
8
7
6
5
3
2
1
DATA1-1
15
TG12
16
5
TG12
6
TG78
BG36
TG78
IN12
IN78
13
BG36
DATA2-2
1
2
14
BG12
BG78
7
BG78
BG45
8
BG45
D2
PTVS58VS1UR
4
REV
DESCRIPTION
DATE
1-7-2015
APPROVED
KAUNG H.
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
PRODUCTION
1
REVISION HISTORY
DATE:
N/A
SIZE
1
SHEET 2
LT4276BIUFD, LT4321IUF
DEMO CIRCUIT 2046A-A
Tuesday, March 31, 2015
IC NO.
4
OF 2
REV.
HIGH EFFICIENCY POE PD INTERFACE WITH INTEGRATED SWITCHING REGULATOR
TITLE: SCHEMATIC
C11
0.047uF
100V
1
ECO
1
2
5
A
B
C
D
DEMO MANUAL DC2046A-A
SCHEMATIC DIAGRAM
Rev A
9
DEMO MANUAL DC2046A-A
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.
Rev A
10
11/18
www.analog.com
ANALOG DEVICES, INC. 2015 - 2018