ON Semiconductor NCP1083QBCGEVB User manual

Semiconductor Components Industries, LLC, 2011
December, 2011 −Rev. 0
1Publication Order Number:
EVBUM2006/D
NCP1083QBCGEVB
Compact, high efficiency,
30W Reference platform
with the NCP1083
Evaluation Board
User's Manual
Board Details
The NCP1083QBCGEVB implements a PoE module that
converts the power from the Ethernet cable to a lower
voltage. The board also supports getting its power from and
auxiliary input, in case PoE network is not available
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.
Figure 1. Front Side of EVB
Figure 2. Back Side of EVB
Table 1. EVALUATION BOARD SPECIFICATIONS
Characteristic Min Typ Max Unit
Input Voltage, PoE Input 36 −57 V
Input Voltage, Auxiliary Input 24 −57 V
Output Voltage −12 −V
Output Current − − 2.5 A
Oscillator Frequency −250 −kHz
Output Ripple − − 170 mV
Efficiency − − 88 %
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EVAL BOARD USER’S MANUAL

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Table 2. BOARD CONNECTOR DESCRIPTION
Connector Pin Description
P1 1 nClassAT, Notification Towards External Processor that IEEE802.3at, 2nd Event Classification
Has Completed
2Not Connected
3Vin, PoE, Pair 1
4Vin, PoE, Pair 1
5Vin, PoE, Pair 2
6Vin, PoE, Pair 2
7Vaux, Positive Auxiliary Input Supply
8Vaux_gnd, Auxiliary Input Supply Ground
Jout 1 12 V Regulated Output
212 V Regulated Output
312 V Regulated Output
4GND Regulated Output
5GND Regulated Output
6GND Regulated Output
Figure 3. Layout Front Figure 4. Layout Back
Figure 5. Silkscreen Front Figure 6. Silkscreen Back

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Figure 7. Schematic
Table 3. BILL OF MATERIALS
Desig-
nator
Qua
ntity
Description Value Toler-
ance
Footprint Manufacturer Manufacturer Part
Number
Substitution
Allowed
Lead
Free
U1 1 Power over
Ethernet
controller
NCP1083 TSSOPEP
20
ON Semiconductor NCP1083DEG No Yes
Cf1 1 Capacitor
SMD
0.1u/50V 10% 0805-C-S Walsin 0805B104K500CT Yes Yes
Cline,
Cpd1
2 Capacitor
SMD
100n/100V 10% 1206-C AVX 12061C104KAT2A Yes Ye s
Csn1 1 Capacitor
SMD
100p/200V 10% 0805-C-S AVX 08052A101JAT2A Yes Yes
Cfb2 1 Capacitor
SMD
12n/50V 10% 0805-C-S AVX 08055C123KAT2A Yes Ye s
Cvdd
h
1 Capacitor
SMD
2.2u/16V (+80%)
to
(-20%)
0805-C-S AVX 0805YC225MAT2A Yes Ye s
Cgnd 1 Capacitor
SMD
2200p/2kV 10% 1812 Walsin 1812B222K202LT Yes Yes
Cfb1 1 Capacitor
SMD
39n/50V 10% 0805-C-S AVX 08055C393KAT2A Yes Ye s
Cvddl 1 Capacitor
SMD
470n/50V 10% 0805-C-S AVX 08055C474KAZ2A No 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 Ye s
Cpd 1 Electrolytic
Capacitor
100u/63V 20% CRD10.0L
17.0RM5.0
Hitano EXR101M63 No Yes
Cf 1 Capacitor
Polar
10u/20V 10% C-TANT-B AVX TAJB106K020R Yes Yes
Cout 1 Capacitor
Polar
68u/25V/5
5mR
10% C-TANT-E AVX TPME686K025R0055 No Yes
T3 1 PoE Plus
Transformer
SM-00112 EFD20 NUFLUX SM-00112 No Yes
Daux
1
1SMD Schottky
Rectifier
MBRS2H1
00T3G
403A-03 ON Semiconductor MBRS2H100T3G No Yes

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Table 3. BILL OF MATERIALS
Desig-
nator
Lead
Free
Substitution
Allowed
Manufacturer Part
Number
ManufacturerFootprintToler-
ance
ValueDescriptionQua
ntity
Dsn,
Dsn1
2SMD Ultrafast
Rectifiers
MURS120
T3G
403A-03 ON Semiconductor MURS120T3G No Yes
Dbr1,
Dbr2,
Dbr3,
Dbr4 ,
Dbr5,
Dbr6,
6SMD 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
Ztvs 1 SMD TVS
Zener
1SMB100
AT3G
403A-03 ON Semiconductor
/ Multicomp
1SMB100AT3G /
SMAJ58A
Yes Yes
Zaux1 1 SMD Zener MM3Z3V3
ST1G
SOD323 ON Semiconductor MM3Z3V3ST1G Yes Yes
Zbr3,
Zbr4
2SMD Zener MMSZ16T
1G
SOD123 ON Semiconductor MMSZ16T1G Yes Yes
Zline 1 SMD TVS
Zener
1SMA58A
T3G
SMA ON Semiconductor
/ Multicomp
1SMA58AT3G /
SMAJ58A
Yes Yes
JOUT 1 Header, 6-Pin Header 6 HDR1X6 FCI 8614-00-36-1-Y0-10 Yes Yes
P1 1 Header, 8-Pin Header 8 HDR1X8 FCI 8614-00-36-1-Y0-10 Yes Yes
L1 1 Drum Core
Choke
10uH/3A 10X12 Prismatic 9404037403 No 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
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
Rcs 1 Resistor SMD 0.1/3W 1% 2512-S Bourns CRA2512-FZ-R100ELF Yes Yes
Rgate 1 Resistor SMD 10 1% 0805-R-S Walsin WR08X10R0FTL Yes Yes
Rinru
sh
1Resistor SMD 121k 1% 0805-R-S Walsin WR08X1213FTL Yes Yes
Rbr3,
Rbr4,
Rosc
3Resistor SMD 150k 1% 0805-R-S Walsin WR08X1503FTL Yes Yes
Rfb1 1 Resistor SMD 15k 1% 0805-R-S Walsin WR08X1502FTL Yes Yes
Rbias
2
1Resistor SMD 20k 1% 0805-R-S Walsin WR08X2002FTL Yes Yes
Rclas
s
1Resistor SMD 30.1 1% 0805-R-S Yageo RC0805FR-0730R1L Yes Yes
Rdet1 1 Resistor SMD 24.9k 1% 0805-R-S Walsin WR08X2492FTL Yes Yes
Rfb2 1 Resistor SMD 3.92k 1% 0805-R-S Walsin WR08X3921FTL Ye s Yes
Rsn1 1 Resistor SMD 330 /1W 5% 2512-S Walsin WR25X331JTL Yes Yes
Raux
1
1Resistor SMD 39.2k 1% 0805-R-S Walsin WR08X3922FTL Ye s Yes
Rilim1 1 Resistor SMD 44.2K 1% 0805-R-S Walsin WR08X4422FTL Yes Ye s
Rbias
1, Rsl
2Resistor SMD 5.1k 5% 0805-R-S Walsin WR08X512JTL Yes Ye s

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Table 3. BILL OF MATERIALS
Desig-
nator
Lead
Free
Substitution
Allowed
Manufacturer Part
Number
ManufacturerFootprintToler-
ance
ValueDescriptionQua
ntity
Rbw,
Rsn2
2Resistor SMD 75 1% 0805-R-S Walsin WR08X750JTL Yes Yes
Rfb3 1 Resistor SMD 820 1% 0805RS Yageo RC0805FR-07820RL Yes Yes
Rdet2 1 Resistor SMD 845 1% 0805-R-S Yageo RC0805FR-07845RL Yes Ye s
Rdet1
’
1Resistor SMD NC 0805-R-S
Rbr1,
Rbr2
2Resistor SMD NC 1% 0805-R-S
Q2,
Q3
2 P-Channel
30V (D-S)
MOSFET
NC POWERP
ACK
1212-8
Vishay Si7113
Csi 1 Capacitor
SMD
NC 0805-C-S
Zbr1,
Zbr2
2SMD Zener NC SOD123 ON Semiconductor MMSZ16T1G
ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice
to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability
arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.
“Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All
operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights
nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications
intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should
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