DC2047A-A High Efficiency PoE PD Interface with Integrated ...
Transcript of DC2047A-A High Efficiency PoE PD Interface with Integrated ...
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DEMO MANUALDC2047A-A
Description
LT4276, LT4321, LT4320 High Efficiency PoE PD Interface with Integrated
Switching Regulator and 9-57VDC/24VAC AUX Support
Demonstration circuit 2047A-A is an IEEE802.3at compli-ant Power over Ethernet (PoE) Powered Device (PD) with support for 9-57VDC and 24VAC auxiliary supply input. It features the LT®4276 PD interface and switching regulator controller, the LT4321 PoE ideal diode bridge controller, and the LT4320 ideal diode bridge controller.
The LT4276 provides IEEE802.3af (PoE, Type 1) and IEEE802.3at (PoE+, Type 2) compliant interfacing and power supply control. It utilizes an external, low RDS(ON) (57mΩ typical) N-channel FET for the hot swap function to improve efficiency. The LT4276 also provides a DC-DC converter configured as a highly efficient flyback topology with synchronous rectification.
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 solution replaces the eight diodes typically found in a passive PoE rectifier bridge.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Analog Devices, Inc. All other trademarks are the property of their respective owners.
performance summary
The LT4320 controls four N-channel FETs (9.6mΩ typical) to replace a diode bridge typically found at the auxiliary supply input. AC rectification and DC polarity correction are provided. This solution reduces voltage drop associ-ated with the diode bridge and enables the power supply operation as low as 9VDC at the auxiliary supply input. This improves end-to-end efficiency and reduces heat.
The DC2047A-A accepts up to 25.5W of delivered power from a Power Sourcing Equipment (PSE) via the RJ45 connector (J1) or a local AC/DC power supply using the auxiliary supply input. When both supplies are connected, the auxiliary supply input has priority over the PoE input. The DC2047A-A supplies a 12V output at up to 1.9A.
Design files for this circuit board are available at http://www.linear.com/demo/DC2047A-A
Specifications are at TA = 25°C
PARAMETER CONDITIONS VALUE
Port Voltage (VPORT) At RJ45 37V to 57V
Auxiliary Voltage (VAUX) From AUX+ to AUX– Terminals 9V to 57VDC/24VAC
Output Voltage (VOUT) 12V (Typical)
Output Current (IOUT) 1.9A (Max)
Output Voltage Ripple VPORT = 42.5V, IOUT = 1.9A 90mVP-P (Typical)
Load Regulation ±0.6% (Typical)
Efficiency VPORT = 42.5V, IOUT = 1.9A, End-to-End 88% (Typical)
Switching Frequency 250kHz (Typical)
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DEMO MANUALDC2047A-A
BoarD photo
Top Side
Bottom Side
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DEMO MANUALDC2047A-A
Top Side Bottom Side
Figure 1. Thermal Pictures (Conditions: VAUX = 57V, VOUT = 12V, IOUT = 1.9A)
9VAUX24VAUX42VAUX/VPORT57VAUX/VPORT
LOAD CURRENT (A)0 0.5 1 1.5 2
50
59
68
77
86
95
EFFI
CIEN
CY (%
)
9VAUX24VAUX42VAUX/VPORT57VAUX/VPORT
LOAD CURRENT (A)0 0.5 1 1.5 2
11.50
11.75
12.00
12.25
12.50
V (OU
T) (V
)
Figure 2. Efficiency (End-to-End) Figure 3. Load Regulation
typical performance characteristics
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DEMO MANUALDC2047A-A
typical performance characteristics
Figure 4. Output Voltage Ripple (Conditions: VAUX = 9V, VOUT = 12V, IOUT = 1.9A)
Figure 5. Load Transient Response (Conditions: VAUX = 9V, Load Step: 0.95A to 1.9A to 0.95A)
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DEMO MANUALDC2047A-A
Figure 6. Gain and Phase Margin of the Flyback DC/DC Converter (Conditions: VAUX = 9V, VOUT = 12V, IOUT = 1.9A)
CROSSOVER FREQUENCY GAIN MARGIN PHASE MARGIN
3.5kHz 12dB 58°
typical performance characteristics
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DEMO MANUALDC2047A-A
Quick start proceDurePower over Ethernet (PoE) Input
1. Disconnect auxiliary supply if it is connected to AUX+ and AUX– inputs of the DC2047A-A.
2. Place and connect test equipment (voltmeter, am-meter, oscilloscope, and electronic load) as shown in Figure 7.
3. Turn down the electronic load to a minimum value and turn off the electronic load.
4. Connect the DC power supply to the DC1567A. Turn on the DC power supply and set its current limit to 1A. Then increase its output voltage to 57V.
5. Connect the output of the DC1567A to the RJ45 con-nector (J1) of the DC2047A using a CAT5e or CAT6 Ethernet cable.
6. After the LED (D4) on the DC2047A is lit, check the output voltage using a voltmeter. Output voltage should be within 12.0V ±0.2V.
7. Turn on the electronic load and increase its load cur-rent up to 1.9A. Observe the output voltage regulation, efficiency, and other parameters.
8. Verify T2P response with a voltmeter as shown in Figure 7. The T2P response to the type of PSE connected to the DC2047A-A is provided in Table 1.
DC1567AIEEE 802.3at
(Type 2, PoE+)PSE
DC POWERSUPPLY
CAT5eor CAT6CABLE
+
–
+
–
VOLTMETER
ELECTRONICLOAD
AMMETER
+
–
+
–
+
–
VOLTMETER+
–
Figure 7. Setup Diagram for PoE Input
Table 1. T2P Response vs PSE TypePSE T2P RESPONSE NEGOTIATED PD INPUT POWER
IEEELogic High 13W
Logic Low 25.5W
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DEMO MANUALDC2047A-A
Quick start proceDureAuxiliary Supply Input
1. Place and connect test equipment (voltmeter, ammeter, oscilloscope, and electronic load) as shown in Figure 8.
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 DC2047A as shown in Figure 8. Turn on the auxiliary supply and set its current limit to 1A. Then increase its output voltage to 48V.
4. Once the LED (D4) on the DC2047A is lit, check the output voltage using a voltmeter. Output voltage should be within 12.0V ±0.2V.
5. Turn on the electronic load and increase its load cur-rent up to 1.9A. Observe the output voltage regulation, efficiency, and other parameters.
6. Verify T2P response with a voltmeter as shown in Figure 8. The T2P response during auxiliary power operation is: Logic Low.
VOLTMETER
ELECTRONICLOAD
AMMETER
+
–
+
–
+
–
VOLTMETER+
–
AUXILIARYSUPPLY
+ –
Figure 8. Setup Diagram for Auxiliary Supply Input
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DEMO MANUALDC2047A-A
parts listITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
DC2047A General BOM
1 1 CG1 CAP, CER, X7R 1000pF 2KV 10% 1808 MURATA GR442QR73D102KW01L
2 1 CG2 CAP, CER, X7R 0.01µF 100V 20% 1206 AVX 12061C103MAT2A
3 0 C1 CAP, CER, OPT 2kV 1812 OPT
4 0 C5 CAP, ELEC, OPT 5.0×5.9 OPT
5 1 C6 CAP, ELEC, 10µF 100V 10% 6.3×7.7 SUNCON 100CE10BS
6 2 C7, C29 CAP, CER, X7S 4.7µF 100V 10% 1210 TDK C3225X7S2A475K200AB
7 1 C10 CAP, CER, X7R 100nF 100V 10% 0805 TDK C2012X7R2A104K125AE
8 2 C11, C12 CAP, CER, X7R 0.047µF 100V 10% 0603 KEMET C0603C473K1RACTU
9 1 C13 CAP, CER, X7R 22µF 10V 20% 1206 MURATA GRM31CR71A226ME15
10 1 C14 CAP, CER, X7R 1µF 100V 10% 0805 MURATA GRJ21BC72A105KE1L
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 1812 MURATA GR443DR73D472KW01L
15 1 C26 CAP, CER, X7R 100pF 16V 10% 0402 AVX 0402YC101KAT2A
16 1 C27 CAP, CER, X7R 4.7nF 6.3V 10% 0402 MURATA GRM155R70J472KA01D
17 1 C28 CAP, ELEC, 680µF 63V 20% 12.5×25 PANASONIC EEU-FR1J681L
18 1 C31 CAP, CER, X7R 0.1µF 100V 10% 0805 MURATA GRM188R72A104KA35
19 4 D2, D16, D19, D23 DIODE, TVS, PTVS58VS1UR 58V SOD123 NXP PTVS58VS1UR
20 1 D3 DIODE, ZENER, MMSZ5252BS 24V SOD323 DIODES INC MMSZ5256BS-7-F
21 1 D4 DIODE, LED ROHM SML-010FTT86L
22 1 D13 DIODE, SCHOTTKY, BAT46WJ,115 100V SOD323 NXP BAT46WJ,115
23 1 D15 DIODE, SCHOTTKY, PMEG10010ELRX 100V SOD123 NXP PMEG10010ELRX
24 1 D17 DIODE, SCHOTTKY, BAT54WS 30V SOD323 DIODE INC BAT54WS-7-F
25 3 D20, D21, D22 DIODE, SILICON, MMSD4148 100V SOD123 FAIRCHILD SEMI MMSD4148
26 8 E2, E3, E4, E5, E7, E9, E11, E12
TP, TURRET, MILL-MAX-2501 0.094" MILL-MAX 2501-2-00-80-00-00-07-0
27 1 J1 CONN, INTEGRATED JACK, 7499511611A WURTH 7499511611A
28 1 J2 CONN, RJ45 JACK, SS-6488S-A-NF STEWART CONNECTOR SS-6488S-A-NF
29 1 L2 IND, 8.2µH WURTH 7443330820
30 1 L3 IND, CMC, 3.3mH WURTH 744272332
31 1 L3 (ALTERNATE) IND, CMC, 3.3mH PCA ELECTRONICS EPA4411-LF
32 1 L4 IND, 22µH BOURNS PM43-220M-RC
33 1 L5 IND, 2.2µH 0805 MURATA LQM21PN2R2NGCD
34 9 Q1, Q11, Q12, Q13, Q14, Q15, Q16, Q17, Q18
MOSFET, N-CH, PSMN075-100MSE 100V LFPAK33 NXP PSMN075-100MSE
35 1 Q4 MOSFET, N-CH, BSC109N10NS3 G 100V SUPERSO8 INFINEON BSC109N10NS3 G
36 1 Q5 TRANSISTOR, PNP, PBSS5140T 40V SOT23 NXP PBSS5140T
37 1 Q6 TRANSISTOR, NPN, PBSS4140T 40V SOT23 NXP PBSS4140T
38 1 Q7 TRANSISTOR, PNP, FMMT723 100V SOT23 DIODES INC FMMT723TA
39 4 Q8, Q9, Q10, Q19 MOSFET, N-CH, PSMN011-60MS 60V LFPAK33 NXP PSMN011-60MS
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DEMO MANUALDC2047A-A
parts listITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
40 4 RT1, RT2, RT3, RT4 RES, CHIP, 75Ω 5% 0603 NIC NRC06J750TRF
41 1 R5 RES, CHIP, 8.2Ω 5% 0805 NIC NRC10J8R2TRF
42 1 R6 RES, CHIP, 3.3k 5% 0603 NIC NRC06J332TRF
43 1 R7 RES, CHIP, 1Ω 5% 0805 NIC NRC101R0TRF
44 3 R12, R28, R34 RES, CHIP, 0Ω SHUNT 0603 NIC NRC06ZOTRF
45 1 R13 RES, CHIP, 100Ω 5% 0603 VISHAY CRCW0603100RJNEA
46 1 R14 RES, CHIP, 15mΩ 1% 2010 VISHAY WSL2010R0150FEA
47 1 R15 RES, CHIP, 15Ω 5% 0603 NIC NRC06J150TRF
48 1 R33 RES, CHIP, 0Ω SHUNT 0805 NIC NRC06ZOTRF
49 1 R17 RES, CHIP, 2.00k 1% 0603 NIC NRC06F2001TRF
50 2 R18, R26 RES, CHIP, 10k 5% 0603 NIC NRC06J103TRF
51 1 R21 RES, CHIP, 158k 1% 0603 NIC NRC06F1583TRF
52 1 R22 RES, CHIP, 107k 1% 0603 NIC NRC06F1071TRF
53 2 R27, R31 RES, CHIP, 10Ω 5% 0402 NIC NRC04J100TRF
54 1 R29 RES, CHIP, 931k 1% 0603 NIC NRC06F9313TRF
55 0 R32 RES, CHIP, OPT 1% 1812 OPT
56 1 ISO1 OPTO, TRANSISTOR OUTPUT OPTOCOUPLER, SO4 TOSHIBA TLP291(GR-TP,SE)
57 1 T3 XFMR, SMD GATE DRIVE, EPA4271GE PCA EPA4271GE
58 0 T3 (ALTERNATE) XFMR, SMD GATE DRIVE, PE-68386NL PULSE PE-68386NL
59 0 T4 XFMR, SMD GATE DRIVE, OPT OPT
60 1 U1 IC, PD AND SWITCHER CONTROLLER, LT4276BIUFD QFN28
LINEAR TECH LT4276BIUFD
61 1 U3 IC, PoE IDEAL DIODE BRIDGE CONTROLLER, LT4321IUF QFN16
LINEAR TECH LT4321IUF
62 1 U4 IC, IDEAL DIODE BRIDGE CONTROLLER, LT4320IDD DFN8
LINEAR TECH LT4320IDD
63 4 MH1-MH4 STAND-OFF, NYLON 0.50" TALL (SNAP ON) KEYSTONE 8833
64 1 STENCIL STENCIL DC2047A
DC2047A-A
1 2 C2,C3 CAP, CER, X5R 10µF 16V 10% 1206 MURATA GRM31CR61C106KA88
2 1 C4 CAP, ELEC, 22µF 16V 20% 5.0×5.9 PANASONIC 16SVP22M
3 1 C8 CAP, CER, U2J 220pF 630V 5% 1206 MURATA GRM31A7U2J221JW31D
4 1 C9 CAP, CER, U2J 220pF 630V 5% 1206 MURATA GRM31A7U2J221JW31D
5 1 C16 CAP, CER, X7R 1µF 25V 10% 0805 MURATA GRM21BR71E105KA99L
6 1 C22 CAP, CER, X7R 3.3nF 25V 10% 0603 AVX 06033C332KAT2A
7 1 C24 CAP, CER, X7R 0.1µF 25V 10% 0603 MURATA GRM188R71E104KA01D
8 1 C25 CAP, CER, X7R 100pF 25V 10% 0603 AVX 06033C101KAT2A
9 0 D18 DIODE, SCHOTTKY, OPT SOD323 OPT
10 1 L1 IND, 180nH COILCRAFT DO1813P-181HC
11 1 Q2 MOSFET, N-CH, TPH5200FNH 250V SOP ADVANCE TOSHIBA TPH5200FNH
12 1 R2 RES, CHIP, 1.5k 5% 0805 NIC NRC06J152TRF
13 1 R3 RES, CHIP, 62Ω 5% 1206 PANASONIC ERJ-8GEYJ620V
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DEMO MANUALDC2047A-A
parts listITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
14 1 R4 RES, CHIP, 62Ω 5% 1206 PANASONIC ERJ-8GEYJ620V
15 1 R8 RES, CHIP, 130Ω 5% 1206 NIC NRC12J131TRF
16 1 R9 RES, CHIP, 130Ω 5% 1206 NIC NRC12J131TRF
17 1 R10 RES, CHIP, 4.75k 1% 0603 NIC NRC06F4751TRF
18 1 R11 RES, CHIP, 5.23k 1% 0603 VISHAY, CRCW06035K23FKEA
19 1 R16 RES, CHIP, 0Ω SHUNT 0805 VISHAY CRCW08050000Z0EA
20 0 R19 RES, CHIP, OPT 1% 0805 OPT
21 1 R20 RES, CHIP, 35.7Ω 1% 0805 VISHAY CRCW080535R7FKEA
22 1 R23 RES, CHIP, 20k 5% 0603 VISHAY CRCW060320K0JNEA
23 1 R24 RES, CHIP, 30k 5% 0603 VISHAY CRCW060330K0JNEA
24 1 R25 RES, CHIP, 47k 5% 0603 NIC NRC06J473TRF
25 0 R30 RES, CHIP, OPT 5% 0805 OPT
26 0 R35 RES, CHIP, OPT 5% 2512 OPT
27 1 T1 XFMR, PWR TRAN, 750315422 WURTH 750315422
28 0 T1 (ALTERNATE) XFMR, PWR TRAN, EPC3601 PCA ELECTRONICS EPC3601G-LF
29 1 FAB, PRINTED CIRCUIT BOARD DEMO CIRCUIT 2047A
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DEMO MANUALDC2047A-A
schematic Diagram5 5
4 4
3 3
2 2
1 1
DD
CC
BB
AA
VPO
RTP
T2P
-VO
UT
+VO
UT
VPO
RTN
___
GN
D
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COM
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37V-
57V
12V/
1.9A
AND
9V-5
7V A
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UPPO
RT
+VO
UT
+VO
UT
VPO
RTP
+VO
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VCC
VCC
VPO
RTP
VPO
RTN
AUX+
AUX-
AUX_
REC
TIFI
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AUX_
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HIS
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-050
7
Milp
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CA 95
035
Phon
e: (4
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32-1
900
1630
McC
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HIGH
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Fax:
(408
)434
-050
7
Milp
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CA 95
035
Phon
e: (4
08)4
32-1
900
1630
McC
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Conf
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sday
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tembe
r 08,
2016
13
HIGH
EFF
ICIE
NCY
POE
PD IN
TERF
ACE
WIT
H IN
TEGR
ATED
SW
ITCH
ING
REGU
LATO
R
K. H
TOO
K. H
TOO
N/A
LT42
76BI
UFD,
LT4
321IU
F, L
T432
0IDD
DEMO
CIR
CUIT
2047
A-A
D13
BAT4
6WJ,
115
1 2
Q1
PSM
N07
5-10
0MSE
6
4
58 7123
8.2u
HL2
Wur
th74
4333
0820
180n
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CO
ILC
RAF
TD
O18
13P-
181H
C
3.3n
F
C22
1uF
C16
0805
R33 0
D21
MM
SD41
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PBSS
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23
R20
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0805
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58VS
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21
R23
20K
22uH
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43-2
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1
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2512
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4.75
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PTC
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1
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23
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6
4
5
87
123
R22
107K
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R17
2.00
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220p
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9
1206
R6
3.3K
OPT
C21
R19
OPT 08
05
R9
130
1206
R3
62 1206
E9
C10
100n
F10
0V
4.7u
F10
0V12
10X7
S
C29
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BSC
109N
10N
S3 G
100V
6
4
5
87
123
100p
F
C25
R15 15
R30
OPT
0805
R5
8.2
0805
R27 10
R31
10
D18
OPT
2 1
EPA4
271G
E
T31 3
6 4
C2
X5R
16V
1206
10uF
E4
D17
BAT5
4WS
21
E2
4.7u
F10
0V12
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S
C7
R7
1
R14
15m
2010
E12
R4
62 1206
+10
uF10
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3x7.
7
C6
0.04
7uF
C12 100V
D15
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21E1
1
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2.2u
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Mur
ata
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2R2N
GC
D
4.7n
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220p
FC
8
1206
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F
C17
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F
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100V
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2
1
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V16
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R11
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6
1 4
2 3
R26
10K
R24
30K
R29
931K
D4
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D
+C
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PT16
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9
OPT
C1
OPT
C15
expo
sed
pad,
sol
der s
ide
U1
LT42
76BI
UFD
VPORT28
HSGATE26
HSSRC25
SWVCC23
DNC22
VCC21
VIN24
PG20
FB31
14
ISE
N-
16
ISE
N+
17
SG18
AU
X2
RC
LAS
S++
3
RC
LAS
S4
GND19
VCC6
VCC7
VCC8
T2P5
SFST11
RLDCMP15
VCC9
GND1
ITH
B13
FFSDLY12
NC27
ROSC10
GND_EP29
4.7n
FC
27
6.3V
D19
PTVS
58VS
1UR
21
22uF
C13
10V
1206
R34
0
L3
3.3m
H74
4272
332
12 3
4
OPT
C18
C3
10uF
X5R
16V
1206
R32
OPT
R8
130
1206
ISO
1TL
P291
, GR
L
1 2
4 3
100p
FC
26
16V
0402
0.1u
FC
24
R2 1.5K
R13
100
VPR
I_SG
SG
VPRI
_SW
PG
VSEC
_SWVS
EC_P
VPRI
_P
PG
VPR
I_SG
VSEC
_SG
VSEC
_SG
FBVS
EC_P
VAU
X_P
FB
12dc2047aafa
DEMO MANUALDC2047A-A
schematic Diagram5 5
4 4
3 3
2 2
1 1
DD
CC
BB
AA
OU
T T
OPH
Y
IN F
RO
MPo
E+PS
E
PoE
IDEA
L D
IOD
E B
RID
GE
AND
9V-5
7V A
UX S
UPPO
RT
VPO
RTN
VPO
RTP
REVI
SION
HIS
TORY
DESC
RIPT
ION
DATE
APPR
OVED
ECO
REV
KAUN
G H.
PROD
UCTI
ON1
36-
23-2
016
REVI
SION
HIS
TORY
DESC
RIPT
ION
DATE
APPR
OVED
ECO
REV
KAUN
G H.
PROD
UCTI
ON1
36-
23-2
016
REVI
SION
HIS
TORY
DESC
RIPT
ION
DATE
APPR
OVED
ECO
REV
KAUN
G H.
PROD
UCTI
ON1
36-
23-2
016
SIZE
DATE
:
IC N
O.RE
V.
SHEE
TOF
TITL
E:
APPR
OVAL
S
PCB
DES.
APP
ENG.
TEC
HN
OLO
GY
Fax:
(408
)434
-050
7
Milp
itas,
CA 95
035
Phon
e: (4
08)4
32-1
900
1630
McC
arth
y Blvd
.
LTC
Conf
iden
tial-F
or C
usto
mer
Use
Onl
y
CUST
OMER
NOT
ICE
LINE
AR T
ECHN
OLOG
Y HA
S MA
DE A
BES
T EF
FORT
TO
DESI
GN A
CIRC
UIT
THAT
MEE
TS C
USTO
MER-
SUPP
LIED
SPE
CIFI
CATI
ONS;
HOW
EVER
, IT R
EMAI
NS T
HE C
USTO
MER'
S RE
SPON
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LITY
TO
VERI
FY P
ROPE
R AN
D RE
LIAB
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PERA
TION
IN T
HE A
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PLIC
ATIO
N. C
OMPO
NENT
SUB
STIT
UTIO
N AN
D PR
INTE
DCI
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ARD
LAYO
UT M
AY S
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FICA
NTLY
AFF
ECT
CIRC
UIT
PERF
ORMA
NCE
OR R
ELIA
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TY. C
ONTA
CT L
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RTE
CHNO
LOGY
APP
LICA
TION
S EN
GINE
ERIN
G FO
R AS
SIST
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.
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CIR
CUIT
IS P
ROPR
IETA
RY T
O LI
NEAR
TEC
HNOL
OGY
AND
SCHE
MAT
IC
SUPP
LIED
FOR
USE
WIT
H LI
NEAR
TEC
HNOL
OGY
PART
S.SC
ALE
= NO
NE
www.
linea
r.com 3
Thur
sday
, Sep
tembe
r 08,
2016
23
HIGH
EFF
ICIE
NCY
POE
PD IN
TERF
ACE
WIT
H IN
TEGR
ATED
SW
ITCH
ING
REGU
LATO
R
K. H
TOO
K. H
TOO
N/A
LT42
76BI
UFD,
LT4
321IU
F, L
T432
0IDD
DEMO
CIR
CUIT
2047
A-A
SIZE
DATE
:
IC N
O.RE
V.
SHEE
TOF
TITL
E:
APPR
OVAL
S
PCB
DES.
APP
ENG.
TEC
HN
OLO
GY
Fax:
(408
)434
-050
7
Milp
itas,
CA 95
035
Phon
e: (4
08)4
32-1
900
1630
McC
arth
y Blvd
.
LTC
Conf
iden
tial-F
or C
usto
mer
Use
Onl
y
CUST
OMER
NOT
ICE
LINE
AR T
ECHN
OLOG
Y HA
S MA
DE A
BES
T EF
FORT
TO
DESI
GN A
CIRC
UIT
THAT
MEE
TS C
USTO
MER-
SUPP
LIED
SPE
CIFI
CATI
ONS;
HOW
EVER
, IT R
EMAI
NS T
HE C
USTO
MER'
S RE
SPON
SIBI
LITY
TO
VERI
FY P
ROPE
R AN
D RE
LIAB
LE O
PERA
TION
IN T
HE A
CTUA
LAP
PLIC
ATIO
N. C
OMPO
NENT
SUB
STIT
UTIO
N AN
D PR
INTE
DCI
RCUI
T BO
ARD
LAYO
UT M
AY S
IGNI
FICA
NTLY
AFF
ECT
CIRC
UIT
PERF
ORMA
NCE
OR R
ELIA
BILI
TY. C
ONTA
CT L
INEA
RTE
CHNO
LOGY
APP
LICA
TION
S EN
GINE
ERIN
G FO
R AS
SIST
ANCE
.
THIS
CIR
CUIT
IS P
ROPR
IETA
RY T
O LI
NEAR
TEC
HNOL
OGY
AND
SCHE
MAT
IC
SUPP
LIED
FOR
USE
WIT
H LI
NEAR
TEC
HNOL
OGY
PART
S.SC
ALE
= NO
NE
www.
linea
r.com 3
Thur
sday
, Sep
tembe
r 08,
2016
23
HIGH
EFF
ICIE
NCY
POE
PD IN
TERF
ACE
WIT
H IN
TEGR
ATED
SW
ITCH
ING
REGU
LATO
R
K. H
TOO
K. H
TOO
N/A
LT42
76BI
UFD,
LT4
321IU
F, L
T432
0IDD
DEMO
CIR
CUIT
2047
A-A
SIZE
DATE
:
IC N
O.RE
V.
SHEE
TOF
TITL
E:
APPR
OVAL
S
PCB
DES.
APP
ENG.
TEC
HN
OLO
GY
Fax:
(408
)434
-050
7
Milp
itas,
CA 95
035
Phon
e: (4
08)4
32-1
900
1630
McC
arth
y Blvd
.
LTC
Conf
iden
tial-F
or C
usto
mer
Use
Onl
y
CUST
OMER
NOT
ICE
LINE
AR T
ECHN
OLOG
Y HA
S MA
DE A
BES
T EF
FORT
TO
DESI
GN A
CIRC
UIT
THAT
MEE
TS C
USTO
MER-
SUPP
LIED
SPE
CIFI
CATI
ONS;
HOW
EVER
, IT R
EMAI
NS T
HE C
USTO
MER'
S RE
SPON
SIBI
LITY
TO
VERI
FY P
ROPE
R AN
D RE
LIAB
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PERA
TION
IN T
HE A
CTUA
LAP
PLIC
ATIO
N. C
OMPO
NENT
SUB
STIT
UTIO
N AN
D PR
INTE
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T BO
ARD
LAYO
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AY S
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FICA
NTLY
AFF
ECT
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TY. C
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INEA
RTE
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TION
S EN
GINE
ERIN
G FO
R AS
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.
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CIR
CUIT
IS P
ROPR
IETA
RY T
O LI
NEAR
TEC
HNOL
OGY
AND
SCHE
MAT
IC
SUPP
LIED
FOR
USE
WIT
H LI
NEAR
TEC
HNOL
OGY
PART
S.SC
ALE
= NO
NE
www.
linea
r.com 3
Thur
sday
, Sep
tembe
r 08,
2016
23
HIGH
EFF
ICIE
NCY
POE
PD IN
TERF
ACE
WIT
H IN
TEGR
ATED
SW
ITCH
ING
REGU
LATO
R
K. H
TOO
K. H
TOO
N/A
LT42
76BI
UFD,
LT4
321IU
F, L
T432
0IDD
DEMO
CIR
CUIT
2047
A-A
DAT
A1-2
D3
MM
SZ52
52BS
24V
21
CG
110
00pF
1808
2KV
Q17
PSM
N07
5-10
0MSE
6
4
5
87
123
D2
PTVS
58VS
1UR
21
Q11
PSM
N07
5-10
0MSE
6
4
5
87
123
DAT
A2-1
RT4
75
DAT
A2-2
R28 0
Q18
PSM
N07
5-10
0MSE
6
4
5
87
123
CG
20.
01uF
100V
1206
Q12
PSM
N07
5-10
0MSE
6
4
5
87
123
Q13
PSM
N07
5-10
0MSE
6
4
5
87
123
J2 SS-6
488S
-A-N
F
1 2 3 4 5 6 7 8
9 10
Q14
PSM
N07
5-10
0MSE
6
4
5
87
123
C11
0.04
7uF
100V
Q15
PSM
N07
5-10
0MSE
6
4
5
87
123
RT1
75
1 2 3 6 4 5 7 8
4 X
12n
F
4 X
75
Ohm
s
1nF
2kV
YLOW
ORG
GRN
J1 7499
5116
11A
TRD
1+11
TRC
T112
TRD
1-10
TRD
2+4
TRC
T26
TRD
2-5
TRD
3+3
TRC
T31
TRD
3-2
TRD
4+8
TRC
T47
TRD
4-9
VC
214
VC
113
VC
315
VC
416
SH
IELD
21S
HIE
LD22
LED
Y-
17
LED
Y+
18
LED
O19
LED
G20
Q16
PSM
N07
5-10
0MSE
6
4
5
87
123
RT3
75
EP
U3
LT43
21IU
F
TG36
1
IN36
2
IN45
3
TG45
4
TG785
IN786
BG787
BG458
OU
TP12
EN
11
EN
10
OU
TN9
TG1216
IN1215
BG1214
BG3613
17O
UTN
DAT
A1-1
RT2
75
DA
TA2-
1
DA
TA2-
2
DAT
A1-1
DAT
A1-2
BG12
BG36
DAT
A1-2
TG36
TG45
DAT
A2-1
DAT
A1-1
DAT
A2-2
TG12
BG45
TG45
BG36
TG36
BG12
TG78
BG78
VPOR
TN
BG78
DATA2-2
TG78
DAT
A2-1
DATA1-1
DAT
A1-2
TG12
BG45
VPOR
TN
VPOR
TP
13dc2047aafa
DEMO MANUALDC2047A-A
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
5 5
4 4
3 3
2 2
1 1
DD
CC
BB
AA
VIN2
VIN1
AND
9V-5
7V A
UX S
UPPO
RT
9V-5
7VDC
24VA
C
AU
X+
AU
X-
AU
X_R
EC
TIFI
ED
+
AU
X_R
EC
TIFI
ED
-
SIZE
DATE
:
IC N
O.RE
V.
SHEE
TOF
TITL
E:
APPR
OVAL
S
PCB
DES.
APP
ENG.
TEC
HN
OLO
GY
Fax:
(408
)434
-050
7
Milp
itas,
CA 95
035
Phon
e: (4
08)4
32-1
900
1630
McC
arth
y Blvd
.
LTC
Conf
iden
tial-F
or C
usto
mer
Use
Onl
y
CUST
OMER
NOT
ICE
LINE
AR T
ECHN
OLOG
Y HA
S MA
DE A
BES
T EF
FORT
TO
DESI
GN A
CIRC
UIT
THAT
MEE
TS C
USTO
MER-
SUPP
LIED
SPE
CIFI
CATI
ONS;
HOW
EVER
, IT R
EMAI
NS T
HE C
USTO
MER'
S RE
SPON
SIBI
LITY
TO
VERI
FY P
ROPE
R AN
D RE
LIAB
LE O
PERA
TION
IN T
HE A
CTUA
LAP
PLIC
ATIO
N. C
OMPO
NENT
SUB
STIT
UTIO
N AN
D PR
INTE
DCI
RCUI
T BO
ARD
LAYO
UT M
AY S
IGNI
FICA
NTLY
AFF
ECT
CIRC
UIT
PERF
ORMA
NCE
OR R
ELIA
BILI
TY. C
ONTA
CT L
INEA
RTE
CHNO
LOGY
APP
LICA
TION
S EN
GINE
ERIN
G FO
R AS
SIST
ANCE
.
THIS
CIR
CUIT
IS P
ROPR
IETA
RY T
O LI
NEAR
TEC
HNOL
OGY
AND
SCHE
MAT
IC
SUPP
LIED
FOR
USE
WIT
H LI
NEAR
TEC
HNOL
OGY
PART
S.SC
ALE
= NO
NE
www.
linea
r.com 3
Thur
sday
, Sep
tembe
r 08,
2016
33
HIGH
EFF
ICIE
NCY
POE
PD IN
TERF
ACE
WIT
H IN
TEGR
ATED
SW
ITCH
ING
REGU
LATO
R
K. H
TOO
K. H
TOO
N/A
LT42
76BI
UFD,
LT4
321IU
F, L
T432
0IDD
DEMO
CIR
CUIT
2047
A-A
SIZE
DATE
:
IC N
O.RE
V.
SHEE
TOF
TITL
E:
APPR
OVAL
S
PCB
DES.
APP
ENG.
TEC
HN
OLO
GY
Fax:
(408
)434
-050
7
Milp
itas,
CA 95
035
Phon
e: (4
08)4
32-1
900
1630
McC
arth
y Blvd
.
LTC
Conf
iden
tial-F
or C
usto
mer
Use
Onl
y
CUST
OMER
NOT
ICE
LINE
AR T
ECHN
OLOG
Y HA
S MA
DE A
BES
T EF
FORT
TO
DESI
GN A
CIRC
UIT
THAT
MEE
TS C
USTO
MER-
SUPP
LIED
SPE
CIFI
CATI
ONS;
HOW
EVER
, IT R
EMAI
NS T
HE C
USTO
MER'
S RE
SPON
SIBI
LITY
TO
VERI
FY P
ROPE
R AN
D RE
LIAB
LE O
PERA
TION
IN T
HE A
CTUA
LAP
PLIC
ATIO
N. C
OMPO
NENT
SUB
STIT
UTIO
N AN
D PR
INTE
DCI
RCUI
T BO
ARD
LAYO
UT M
AY S
IGNI
FICA
NTLY
AFF
ECT
CIRC
UIT
PERF
ORMA
NCE
OR R
ELIA
BILI
TY. C
ONTA
CT L
INEA
RTE
CHNO
LOGY
APP
LICA
TION
S EN
GINE
ERIN
G FO
R AS
SIST
ANCE
.
THIS
CIR
CUIT
IS P
ROPR
IETA
RY T
O LI
NEAR
TEC
HNOL
OGY
AND
SCHE
MAT
IC
SUPP
LIED
FOR
USE
WIT
H LI
NEAR
TEC
HNOL
OGY
PART
S.SC
ALE
= NO
NE
www.
linea
r.com 3
Thur
sday
, Sep
tembe
r 08,
2016
33
HIGH
EFF
ICIE
NCY
POE
PD IN
TERF
ACE
WIT
H IN
TEGR
ATED
SW
ITCH
ING
REGU
LATO
R
K. H
TOO
K. H
TOO
N/A
LT42
76BI
UFD,
LT4
321IU
F, L
T432
0IDD
DEMO
CIR
CUIT
2047
A-A
SIZE
DATE
:
IC N
O.RE
V.
SHEE
TOF
TITL
E:
APPR
OVAL
S
PCB
DES.
APP
ENG.
TEC
HN
OLO
GY
Fax:
(408
)434
-050
7
Milp
itas,
CA 95
035
Phon
e: (4
08)4
32-1
900
1630
McC
arth
y Blvd
.
LTC
Conf
iden
tial-F
or C
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DEMO MANUALDC2047A-A
© LINEAR TECHNOLOGY CORPORATION 2016
LT 0917 REV A • 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