NCP1081SPCGEVB Compact, high efficiency, 30W Reference platform with the NCP1081 Evaluation Board User's Manual http://onsemi.com EVAL BOARD USER’S MANUAL 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. Figure 1. Front Side of EVB Warnings Close to the switching MOSFET voltages on the board may exceed 200 V (@250 kHz). Temperature of board and its components may exceed 85C 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. Figure 2. Back Side of EVB 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 % Semiconductor Components Industries, LLC, 2011 December, 2011 − Rev. 0 1 Publication Order Number: EVBUM2028/D NCP1081SPCGEVB Table 2. BOARD CONNECTOR DESCRIPTION Connector Pin 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 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 J1 JOUT Description 12V 12 V Regulated Output GND GND Regulated Output 3 12 V Regulated Output Figure 3. Layout (Top) Figure 4. Layout (Bottom) http://onsemi.com 2 NCP1081SPCGEVB Figure 5. All Layers and Dimensiones Figure 6. Schematic http://onsemi.com 3 NCP1081SPCGEVB Table 3. BILL OF MATERIALS Designator Qua ntity Description Value U1 1 Power over Ethernet controller NCP1081 C1, C2, C3, C4, Cf1 5 Capacitor SMD 100n/50V Cf 1 Capacitor Polar Cfb1 1 Cfb2 Tolerance Footprint Manufacturer Manufacturer Part Number Substitution Allowed Lead Free TSSOPEP 20 ON Semiconductor NCP1081DEG No Yes 10% 0805-C-S Walsin 0805B104K500CT Yes Yes 10u/20V 10% C-TANT-B AVX TAJB106K020R Yes Yes Capacitor SMD 39n/50V 10% 0805-C-S AVX 08055C393KAT2A Yes Yes 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 http://onsemi.com 4 NCP1081SPCGEVB Table 3. BILL OF MATERIALS Designator Qua ntity Description Value Led 1 LED Q1 1 Q4 Tolerance Footprint Manufacturer Manufacturer Part Number Substitution Allowed Lead Free KP-2012S GC 0805-D-S EVERLIGHT 17-21SYGC/S530-E2/T R8 Yes Yes MOSFET N-CHANNEL Si7462DP SOPP8 Vishay Siliconix Si7462DP No Yes 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 PS2801-1F3-A SSOP4 CEL PS2801-1 No Yes U3 1 Programmable Shunt Voltage Reference TL432BID BZTG4 SOT23 Texas-Instruments TL432BIDBZTG4 No Yes ON Semiconductor MMSZ16T1G Vishay Si7113 Csi 1 Capacitor NC 0805-C-S Csn 1 Capacitor NC 1206-C Zbr1, Zbr2 2 SMD Zener NC SOD123 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 http://onsemi.com 5 NCP1081SPCGEVB ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). 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