onsemi NCP1081SPCGEVB Compact High Efficiency 30W Reference Platform User Manual
- June 13, 2024
- onsemi
Table of Contents
onsemi NCP1081SPCGEVB Compact High Efficiency 30W Reference Platform
Board Details
The NCP1081SPCGEVB implements a PoE power splitter that converts the voltage
on the Ethernet cable to a lower voltage. The board is equipped with 2 RJ45
connectors, one connector serves as the data and power input and the other
connector is the data output. Ethernet data is untouched by the board and
simply forwarded.
Warnings
Close to the switching MOSFET voltages on the board may exceed 200 V (@250
kHz). Temperature of board and its components may exceed 85°C during normal
operation. The Evaluation board was designed to operate correctly under these
conditions.
The input voltage should never exceed 57 V nor should the evaluation board be
loaded with loads higher than the specified 30 W. Exceeding the specified
input and output values could permanently damage the board.
Table 1. EVALUATION BOARD SPECIFICATIONS
| Characteristic | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage, PoE Input | 36 | − | 57 | V |
| Output Voltage | − | 12 | − | V |
| Output Current | − | − | 2.5 | A |
| Oscillator Frequency | − | 250 | − | kHz |
| Output Ripple | − | − | 170 | mV |
| Efficiency | − | − | 88 | % |
Table 2. BOARD CONNECTOR DESCRIPTION
| Connector | Pin | Description |
|---|---|---|
| J4 | 1 | TX+/BI_DA+, Data and Power Input, Pair 1, Mode A |
| 2 | TX−/BI_DA−, Data and Power Input, Pair 1, Mode A | |
| 3 | RX+/BI_DB+, Data and Power Input, Pair 2, Mode A | |
| 4 | NC/BI_DC+, Data and Power Input, Pair 1, Mode B | |
| 5 | NC/BI_DC+, Data and Power Input, Pair 1, Mode B | |
| 6 | RX−/BI_DB−, Data and Power Input, Pair 2, Mode A | |
| 7 | NC/BI_DD+, Data and Power Input, Pair 2, Mode B | |
| 8 | NC/BI_DD−, Data and Power Input, Pair 2, Mode B | |
| J1 | 1 | TX+/BI_DA+, Data Output |
| 2 | TX−/BI_DA−, Data Output | |
| 3 | RX+/BI_DB+, Data Output | |
| 4 | NC/BI_DC+, Data Output | |
| 5 | NC/BI_DC+, Data Output | |
| 6 | RX−/BI_DB−, Data Output | |
| 7 | NC/BI_DD+, Data Output | |
| 8 | NC/BI_DD−, Data Output | |
| JOUT | 12V | 12 V Regulated Output |
| GND | GND Regulated Output | |
| 3 | 12 V Regulated Output |
NCP1081SPCGEVB
Table 3. BILL OF MATERIALS
Designator| Quantity| Description| Value| Tolerance|
Footprint| Manufacturer| Manufacturer Part Number|
Substitution Allowed| Lead Free
---|---|---|---|---|---|---|---|---|---
U1| 1| Power over Ethernet controller| NCP1081| | TSSOPEP 20| ON
Semiconductor| NCP1081DEG| No| Yes
C1,
C2,
C3,
C4,
Cf1
| 5| Capacitor SMD| 100n/50V| 10%| 0805-C-S| Walsin| 0805B104K500CT| Yes| Yes
Cf| 1| Capacitor Polar| 10u/20V| 10%| C-TANT-B| AVX| TAJB106K020R| Yes| Yes
Cfb1| 1| Capacitor SMD| 39n/50V| 10%| 0805-C-S| AVX| 08055C393KAT2A| Yes| Yes
Cfb2| 1| Capacitor SMD| 12n/50V| 10%| 0805-C-S| AVX| 08055C123KAT2A| Yes| Yes
Cgnd| 1| Capacitor SMD| 2200p/2kV| 10%| 1812| Walsin| 1812B222K202LT| Yes| Yes
Cline, Cpd1, Cpd2| 3| Capacitor SMD| 100n/100V| 10%| 1206-C| AVX|
12061C104KAT2A| Yes| Yes
Cout| 1| Capacitor Polar| 68u/25V/5 5mR| 10%| C-TANT-E| AVX| TPME686K025R0055|
No| Yes
Cpd| 1| Capacitor Polar| 100u/63V| 20%| CRD10.0L 17.0RM5.0| Hitano| EXR101M63|
No| Yes
Csn1| 1| Capacitor SMD| 100p/200V| 10%| 0805-C-S| AVX| 08052A101JAT2A| Yes|
Yes
Csn2| 1| Capacitor SMD| 470p/200V| 10%| 0805-C-S| AVX| 08052C47KJAT2A| Yes|
Yes
Css| 1| Capacitor SMD| 47n/50V| 10%| 0805-C-S| AVX| 08055C473KAT2A| Yes| Yes
Cvdd h| 1| Capacitor SMD| 2.2u/16V| (+80%)
to
(-20%)
| 0805-C-S| AVX| 0805YC225MAT2A| Yes| Yes
Cvddl| 1| Capacitor SMD| 470n/50V| 10%| 0805-C-S| AVX| 08055C474KAZ2A| No| Yes
T3| 1| PoE Plus Transformer| SM-00112| | EFD20| NUFLUX| SM-00112| No| Yes
Dbr1, Dbr2, Dbr3, Dbr4, Dbr5, Dbr6,| 6| SMD Schottky Rectifier| MBRS110 0T3G|
| 403A-03| ON Semiconductor| MBRS1100T3G| No| Yes
Dbw, Dgate| 2| SMD
Switching Diode
| BAS16HT 1G| | SOD323| ON Semiconductor| BAS16HT1G| Yes| Yes
Dsec| 1| SMD Schottky Rectifier| 12CWQ06 FNPBF| | DPAK| Vishay| 12CWQ06FNPBF|
No| Yes
Dsn, Dsn1| 2| SMD Ultrafast Rectifiers| MURS120 T3G| | 403A-03| ON
Semiconductor| MURS120T3G| No| Yes
Zbr3, Zbr4| 2| SMD Zener| MMSZ16T 1G| | SOD123| ON Semiconductor| MMSZ16T1G|
Yes| Yes
Zline| 1| SMD TVS Zener| 1SMA58A T3G| | SMA| ON Semiconductor / Multicomp|
1SMA58AT3G / SMAJ58A| Yes| Yes
Ztvs| 1| SMD TVS Zener| 1SMB100 AT3G| | 403A-03| ON Semiconductor / Multicomp|
1SMB100AT3G / SMAJ58A| Yes| Yes
J1, J4| 2| 8 Position 8 Contact (8P8C) modular jack communication s connector|
RJ45| | 95501-288
1
| MOLEX| 95501-2881| Yes| Yes
L1| 1| Drum Core Choke| 10uH/3A| | 10X12| Prismatic| 9404037403| No| Yes
Table 3. BILL OF MATERIALS
Desig- nator| Qua ntity| Description| Value| Toler-
ance| Footprint| Manufacturer| Manufacturer Part Number|
Substitution Allowed| Lead Free
---|---|---|---|---|---|---|---|---|---
Led| 1| LED| KP-2012S GC| | 0805-D-S| EVERLIGHT| 17-21SYGC/S530-E2/T R8| Yes|
Yes
Q1| 1| MOSFET N-CHANNEL| Si7462DP| | SOPP8| Vishay Siliconix| Si7462DP| No|
Yes
Q4| 1| MOSFET N-CHANNEL| FDS3992| | SO-8| Fairchild| FDS3992| No| Yes
Qgate| 1| Transistor PNP| BFT92| | SOT23| Philips| BFT92| Yes| Yes
Rbias 1, Rsl| 2| Resistor SMD| 5.1k| 5%| 0805-R-S| Walsin| WR08X512JTL| Yes|
Yes
Rbias 2| 1| Resistor SMD| 20k| 1%| 0805-R-S| Walsin| WR08X2002FTL| Yes| Yes
Rbr3, Rbr4, Rosc| 3| Resistor SMD| 150k| 1%| 0805-R-S| Walsin| WR08X1503FTL|
Yes| Yes
Rbw, Rsn2| 2| Resistor SMD| 75| 1%| 0805-R-S| Walsin| WR08X750JTL| Yes| Yes
Rclas s| 1| Resistor SMD| 30.1| 1%| 0805-R-S| Yageo| RC0805FR-0730R1L| Yes|
Yes
Rcs| 1| Resistor SMD| 0.1/3W| 1%| 2512-S| Bourns| CRA2512-FZ-R100ELF| Yes| Yes
Rdet1| 1| Resistor SMD| 24.9k| 1%| 0805-R-S| Walsin| WR08X2492FTL| Yes| Yes
Rdet2| 1| Resistor SMD| 845| 1%| 0805-R-S| Yageo| RC0805FR-07845RL| Yes| Yes
Rfb1| 1| Resistor SMD| 15k| 1%| 0805-R-S| Walsin| WR08X1502FTL| Yes| Yes
Rfb2| 1| Resistor SMD| 3.92k| 1%| 0805-R-S| Walsin| WR08X3921FTL| Yes| Yes
Rfb3| 1| Resistor SMD| 820| 1%| 0805-R-S| Yageo| RC0805FR-07820RL| Yes| Yes
Rgate| 1| Resistor SMD| 10| 1%| 0805-R-S| Walsin| WR08X10R0FTL| Yes| Yes
Rilim1| 1| Resistor SMD| 44.2K| 1%| 0805-R-S| Walsin| WR08X4422FTL| Yes| Yes
Rinru sh| 1| Resistor SMD| 121k| 1%| 0805-R-S| Walsin| WR08X1213FTL| Yes| Yes
Rled| 1| Resistor SMD| 1k| 5%| 0805-R-S| Yageo| RC080JR-07KL| Yes| Yes
Rsn1| 1| Resistor SMD| 330E /1W| 5%| 2512-S| Walsin| WR25X331JTL| Yes| Yes
T1, T2| 2| WE-LAN SMD-10/100 BASE T| POE+ 350uH OCL 720mA IDC| 2%| SMD| Wurth-
Elektronik| 749012011| No| Yes
U2| 1| HIGH ISOLATION VOLTAGE SSOP PHOTOCOUP LER| PS2801-1- F3-A| | SSOP4|
CEL| PS2801-1| No| Yes
U3| 1| Programmable Shunt Voltage Reference| TL432BID BZTG4| | SOT23| Texas-
Instruments| TL432BIDBZTG4| No| Yes
Csi| 1| Capacitor| NC| | 0805-C-S| | | |
Csn| 1| Capacitor| NC| | 1206-C| | | |
Zbr1, Zbr2| 2| SMD Zener| NC| | SOD123| ON Semiconductor| MMSZ16T1G| |
Rbr1, Rbr2| 2| Resistor SMD| NC| | 0805-R-S| | | |
Rdet1 ’| 1| Resistor SMD| NC| | 0805-R-S| | | |
Rsn| 1| Resistor SMD| NC| | 2512-S| | | |
Q2, Q3| 2| P-Channel 30V (D-S) MOSFET| NC| | POWERP ACK 1212-8| Vishay|
Si7113| |
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