Texas Instruments TPS2378EVM-602 User manual

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TPS2378EVM-602 Evaluation Module
User's Guide
SLVUAG7A–May 2015–Revised July 2017
TPS2378EVM-602 Evaluation Module
This user’s guide describes the TPS2378 evaluation module (TPS2378EVM-602). TPS2378EVM-602
contains evaluation and reference circuitry for a forced four-pair UPOE compliant application.
Contents
1 Introduction ................................................................................................................... 2
2 Electrical Specifications .................................................................................................... 2
3 Description ................................................................................................................... 2
4 Schematic..................................................................................................................... 3
5 General Configuration and Description .................................................................................. 6
6 TPS2378EVM-602 Performance Data.................................................................................... 8
7 EVM Assembly Drawing and Layout Guidelines ...................................................................... 10
8 Bill of Materials ............................................................................................................. 15
List of Figures
1 TPS2378EVM-602 PD Front-End Schematic ........................................................................... 3
2 TPS2378EVM-602 Dual PD section ...................................................................................... 4
3 TPS2378EVM-602 DCDC Converter Section ........................................................................... 5
4 Typical TPS2378EVM-602 Test Setup ................................................................................... 7
5 Startup Response to 26-W Load for a 48-V Input....................................................................... 8
6 Transient Response from 290 mA to 2.9 A for a 48-V Input........................................................... 8
7 Efficiency of the TPS2378EVM-602....................................................................................... 9
8 Top Side Component Placement ........................................................................................ 10
9 Top Side Routing........................................................................................................... 10
10 Layer 2 Routing............................................................................................................. 11
11 Layer 3 Routing............................................................................................................. 11
12 Bottom Side Routing....................................................................................................... 12
13 Bottom Component Placement .......................................................................................... 12
List of Tables
1 TPS2378EVM-602 Electrical and Performance Specifications at 25°C.............................................. 2
2 Connector Functionality .................................................................................................... 6
3 Test Points ................................................................................................................... 6
4 TPS2378EVM-602 BOM .................................................................................................. 15
Trademarks
All trademarks are the property of their respective owners.

Introduction www.ti.com
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TPS2378EVM-602 Evaluation Module
1 Introduction
The TPS2378EVM-602 allows reference circuitry evaluation of a dual TPS2378 forced four pair UPOE
compliant application. It contains input and output power connectors and an array of onboard test points
for circuit and evaluation.
1.1 Features
• Excellent efficiency, driven, synchronous flyback design.
• Forced four-pair UPOE compliant
• 19 V at 2.3 A DC output (2.9-A capable)
1.2 Applications
• Universal power over ethernet (UPOE) compliant devices
• Video and VoIP telephones
• Multiband access points
• Security cameras
• Pico-base stations
2 Electrical Specifications
(1) Per TPS2378 PD
Table 1. TPS2378EVM-602 Electrical and Performance Specifications at 25°C
Parameter Condition MIN TYP MAX Unit
Power Interface
Input Voltage Applied to the power pins of connectors J1 or J3 42.5 57
V
Operating Voltage(1) After start up. 30 57
Input UVLO, POE input J1(1) Rising input voltage 40
Falling input voltage 30
Detection voltage(1) at device terminals 1.4 10.1
Classification voltage(1) at device terminals 11.9 23.0
Classification current(1) Rclass = 63.4 Ω38 42
mAInrush current-limit(1) 100 180
Operating current-limit(1) 850 1200
DC/DC Converter
Output Voltage 42.5 ≤VIN ≤57 V, ILOAD ≤ILOAD (max) 19-V output 19.01 19.04 19.07 V
Output Current 42.5 ≤VIN ≤57 V 19-V output 2.9 A
Output ripple voltage, pk-to-pk VIN = 48 V, ILOAD = 2.9 A 19-V output 225 mV
Efficiency, dc-dc converter VIN = 48 V, ILOAD = 2.9 A 93%
Efficiency, end- to-end VIN = 48 V, ILOAD = 2.9 A 19-V output 90%
Switching frequency 225 270 kHz
3 Description
TPS2378EVM-602 enables full evaluation of a forced four pair UPOE compliant application. A detailed
discussion regarding this type of high power PoE can be found in SLVA625.
The TPS23861EVM-612 contains two high power ports in which either one can be connected to the
TPS2378EVM-602 with a CAT5E cable to power the EVM. This is described in Section 5.2.

POE INPUT ETHERNET DATA
42.5-57VDC
CHGND
CHGND
2
3
4
1
5
6
7
8
J3
2
3
4
1
5
6
7
8
J4
0.01µF
C26
0.01µF
C27
0.01µF
C28
0.01µF
C29
75.0
R32
75.0
R33
75.0
R34
75.0
R35
75.0
R28
75.0
R29
75.0
R30
75.0
R31
1000pF
C25
1000pF
C32
1000pF
C30
1000pF
C31
100 ohm
L3
100 ohm
L4
100 ohm
L5
100 ohm
L6
PAIR12
PAIR36
PAIR45
PAIR78
CHGND
D8 D9
D10 D11
D12 D13
D14 D15
1
2
3
4
J8
DNP
J9
DNP
J10
DNP
~BRG1
~BRG2
+BRG1
-BRG1
+BRG2
-BRG2
TP16
TP12
TP13
TP14
TP15
VSS2
VSS1
VDD
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
1:1
1:1
1:1
1:1
T3
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4 Schematic
Figure 1. TPS2378EVM-602 PD Front-End Schematic

UPOE
OUTPUT
60W MAX
T2P1+
T2P1-
T2P2+
T2P2-
PWRGND
0.1µF
C34
0.1µF
C36
24.9k
R55
24.9k
R49
63.4
R52
63.4
R44
100k
R41
100k
R56
100k
R40
100k
R48
10.0k
R39
10.0k
R38
0.01µF
C37
0.01µF
C38
BAT46W -7-F
D21
BAT46W -7-F
D22
47µF
C35
47µF
C33
4
1
2
3
J6
VDD
1
DEN
2
CLS
3
VSS
4RTN 5
CDB 6
T2P 7
APD 8
PWPD
9
U3
TPS237 8DDA
VDD
1
DEN
2
CLS
3
VSS
4RTN 5
CDB 6
T2P 7
APD 8
PWPD
9
U4
TPS237 8DDA
1
2
4
3
FOD817DS
U5
1
2
4
3
FOD817DS
U8
58V
SMAJ58A
D17
BSS12 3
Q6
BSS12 3
Q7
58V
SMAJ58A
D19
4
7,8 1,2,3
5,6,
FDMS86105
Q9
4
7,8 1,2,3
5,6,
FDMS86105
Q8
0
R43
DNP
BAT46W -7-F
D20
30.1k
R42
20.0k
R50
DNP
VBIAS
VBIAS
PGND
LO E6SF-ABCB-24-1-Z
D16
VOUT
PGND
LO E6SF-ABCB-24-1-Z
D18
49.9k
R46
10.0k
R47
VBIAS
VOUT
49.9k
R53
VOUT
T2P-VPU1
MMBT555 0LT1G
Q5 1
2
4
3
HMHA280 1A
U7
8.87k
R45
78.7k
R51
VOUT
PGNDPWRGND
5.6k
1W
R37
5.6k
1W
R36
J5
J7
VOUT
T2P-VPU2
12.1k
R57
33.2k
R58
10.0k
R54
TP18
TP17
VDD
VSS1
TP19
VSS2
RTN1
RTN2
VSS1
VSS2
SS
VDD
100
R59
DNP
VBIAS
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Figure 2. TPS2378EVM-602 Dual PD section

SPGND
19V/2.9A
PGND
PGND
PGND
PGND
PWRGND
PWRGND
PWRGND
PWRGND
PWRGND
PGND
PGND
PGND
PGND
PWRGND
PWRGND
PWRGND
PWRGND
PWRGND
PGND
0.1µF
C2
0.1µF
C6
200k
R24
10.0k
R18
10.0k
R19
10.0k
R11
0
R14
2.2µF
C3
2.2µF
C4
2.2µF
C5
39k
R1
MURA120 T3G
D1
2200pF
C1
4.7
R2
MMSD414 8T1G
D2
MMSD414 8T1G
D5
4
7,8
1,2,3
5,6,
FDMS86252
Q1
MMBT390 6
Q2
MMBT390 6
Q4
0.1
R4
1.00k
R5
100pF
C13
20.0
R8
BAT54S -7-F
D6
BAT54S -7-F
D7
BAT54S -7-F
D4
1µF
C11
1µF
C23
0.047µF
C21
10µF
C8
10µF
C9
10µF
C10 68µF
C7 J1
470pF
C12
0.47µF
C15
0.47µF
C16
47pF
C19
20.0
R7
3.83k
R17
49.9k
R23
2200pF
C17
1 4
8 5
PA0184NLT
T2
22µF
C14
4
7,8
1,2,3
5,6,
FDMS86105
Q3
7.5k
R26
PWRGND
PWRGND
121k
R9
121k
R12
1µF
C22
0.039µF
C24
VIN
1
NC
2
RTDEL
3
RON
4
ROFF
5
VREF 6
SYNC
7
GND 8
CS 9
RSLOPE
10 FB 11
SS/SD
12
PGND 13
AUX 14
OUT 15
PVDD
16
VDD
17
LINEUV 18
LINEOV 19
NC
20
U6
UCC2897APW
0.01µF
C18
80.6k
R16
61.9k
R20
100k
R21
1µF
C20
2.61k
R10
4.22k
R13
7.50k
R15
10
1W
R6
VBIAS
VOUT
LY E6SF-AABA-46-1-Z
D3
PGND
10.0k
R3
HMHA280 1A
U1
J2
LPS4018-332MLB
L1
1
3
12
11
5
6
7
8
9
10
T1
L2
3
4
5
NC
1NC 2
U2
TL431AIDBV
4
7,8
1,2,3
5,6,
Q10
CSD1850 4Q5A
1 2
J11
Load Delay Disable
25.5k
R62
25.5k
R63
0.1µF
C40
2.2µF
C39
1.43k
R61
47.5k
R60
RESET 1
NC
2
CT 3
SENSE
4
VCC
8
NC
7NC
6
GND 5
U9
TL7700CDGKR
PGND
PGND
PGND
VOUT
Optional Load Delay Circuit
0.1µF
C41
TP4
TP11
FB
PGND
TP21
SPGND
TP7
PWRGND
TP2
PWRGND
TP10
VREF
6.81k
R25
2.00k
R27
1.21M
R22
TP8
VBIAS
TP5
OUT
TP6
CS
TP3
DRAIN
TP9
LOOP
TP1
VOUT
TP20
RL_INHBT
VDD
SS
RL_INHBT
RL_INHBT
PWRGND
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Figure 3. TPS2378EVM-602 DCDC Converter Section

General Configuration and Description www.ti.com
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5 General Configuration and Description
5.1 Physical Access
Table 2 lists the EVM connector functionality. Table 3 describes the test point availability, and describes
the jumper functionality.
Table 2. Connector Functionality
Connector Label Description
J1 VOUT 19-V output voltage of the DCDC converter
J2 LED output ON signal
J3 PWR+DATA PoE input. Connect to PSE power and data source.
J4 DATA Ethernet data passthrough. Connect to downstream Ethernet device
J5 T2P-VPU1 T2P Pull up voltage of PD1
J6 T2P T2P output signals for both TPS2378 PDs
J7 T2P-VPU2 T2P Pull up voltage of PD2
J11 Load Delay Disable Disables load delay
Table 3. Test Points
Test Points Label Description
TP1 Output Output voltage
TP2, TP7 PWRGND Primary Ground
TP3 DRAIN Primary FET drain voltage
TP4 PGND Secondary Ground
TP5 OUT Primary FET gate voltage
TP6 CS Current sense voltage
TP8 VBIAS Aux bias voltage
TP9 LOOP AC Injector point for measuring loop response
TP10 VREF Reference voltage
TP11 FB Opto Feedback voltage
TP12 PAIR12 Voltage on pairs 1 and 2 of the Ethernet cable
TP13 PAIR36 Voltage on pairs 3 and 6 of the Ethernet cable
TP14 PAIR45 Voltage on pairs 4 and 5 of the Ethernet cable
TP15 PAIR78 Voltage on pairs 7 and 8 of the Ethernet cable
TP16 CHGND Chassis ground
TP17 VDD Chassis ground
TP18 VSS1 VSS1 pin of PD1
TP19 VSS2 VSS2 pin of PD2
TP20 RL_INHBT Gate voltage of load delay FET
TP21 SPGND Load ground

TPS2378EVM-602
J3
J4
J1
PSE Ethernet Cable
VOUT
GND
Ethernet
Device
TPS23861EVM-612
J9 or J21
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5.2 Test Setup
Figure 4 shows the typical test set for the TPS2378EVM-602 using the TPS23861EVM-612.
1. Power the TPS23861EVM-612 as described in SLUUAY8.
2. Connect J3 of the TPS2378EVM-602 to J9 or J21 of the TPS23861EVM-612 using a standard CAT5E
cable.
3. Vary the load as necessary for test purposes.
Figure 4. Typical TPS2378EVM-602 Test Setup
5.2.1 Testing the TPS2378EVM-602 without a PSE
The TPS2378EVM-602 can be evaluated without a PSE and only a power supply.
1. Set the power supply between 42.5 V – 57 V Turn off the power supply
2. Short TP15 to TP13
3. Short TP14 to TP12
4. Connect the positive lead of the power supply to TP15
5. Connect the return lead of the power supply to TP14
6. Turn on the power supply
7. Vary the input voltage and output load as necessary for test purposes

2 ms/div
500 mV/div
1 A/div
50 ms/div
20 V/div
200 mA/div
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6 TPS2378EVM-602 Performance Data
6.1 Startup
Figure 5 illustrates the startup response of the TPS2378EVM-602 (Ch2-VOUT) with 26-W output load.
Ch1 and Ch4 show the input current of each TPS2378 PD when the TPS23861EVM-612 is connected to
the EVM. It shows Type 2 hardware classification and subsequent inrush before starting up and sharing
current.
Figure 5. Startup Response to 26-W Load for a 48-V Input
6.2 Transient Response
Figure 6 illustrates the transient response of the TPS2378EVM-602.
Figure 6. Transient Response from 290 mA to 2.9 A for a 48-V Input

Output Current (A)
Efficiency
0 0.5 1 1.5 2 2.5 3
0
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
D001
PoE
Converter
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6.3 Efficiency
Figure 7 illustrates the efficiency of the TPS2378EVM-602.
Figure 7. Efficiency of the TPS2378EVM-602
6.4 Startup to Resistive Overload with TPS23861EVM-612
The IEEE802.3at standard requires the PD to startup with less than 13 W (per pair) for 80 ms during PSE
inrush. When using the TPS2378EVM-602 EVM with the TPS23861EVM-612 for evaluation while using
resistive loads, the output load must be light enough (< 1 A) at startup to meet this requirement. When the
output is operational, the load can be further increased to nominal 2.3A.
For startup to higher loads (> 1 A) the TPS2378EVM-602 contains an optional load delay circuit (shown in
Figure 3) that delays connecting the resistive load while the PSE finishes inrush.
The load delay circuit is for evaluation only of the EVM using resistive loads. In final system PD designs, it
is the load’s task to accommodate the PSEs inrush time.
To disable the load delay circuit, shunt J11.

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7 EVM Assembly Drawing and Layout Guidelines
7.1 PCB Drawings
Figure 8 to Figure 13 show component placement and layout of the TPS2378EVM-602.
Figure 8. Top Side Component Placement
space
Figure 9. Top Side Routing

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Figure 10. Layer 2 Routing
space
Figure 11. Layer 3 Routing

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Figure 12. Bottom Side Routing
space
Figure 13. Bottom Component Placement

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7.2 Layout Guidelines
The layout of the PoE front end should follow power and EMI/ESD best-practice guidelines. A basic set of
recommendations include:
• Parts placement must be driven by power flow in a point-to-point manner; RJ-45, Ethernet transformer,
diode bridges, TVS and 0.1-μF capacitor, and TPS2378 converter input bulk capacitor.
• Make all leads as short as possible with wide power traces and paired signal and return.
• No crossovers of signals from one part of the flow to another are allowed.
• Spacing consistent with safety standards like IEC60950 must be observed between the 48-V input
voltage rails and between the input and an isolated converter output.
• Place the TPS2378 over split, local ground planes referenced to VSS for the PoE input and to
COM/RTN for the converter. Whereas the PoE side may operate without a ground plane, the converter
side must have one. Do not place logic ground and power layers under the Ethernet input or the
converter primary side.
• Use large copper fills and traces on SMT power-dissipating devices, and use wide traces or overlay
copper fills in the power path.
The DC/DC Converter layout benefits from basic rules such as:
• Use large copper fills and traces on SMT power-dissipating devices, and use wide traces or overlay
copper fills in the power path.
• Minimize trace length of high current, power semiconductors, and magnetic components.
• Where possible, use vertical pairing
• Use the ground plane for the switching currents carefully.
• Keep the high-current and high-voltage switching away from low-level sensing circuits including those
outside the power supply.
• Proper spacing around the high-voltage sections of the converter

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7.3 EMI Containment
• Use compact loops for dv/dt and di/dt circuit paths (power loops and gate drives)
• Use minimal, yet thermally adequate, copper areas for heat sinking of components tied to switching
nodes (minimize exposed radiating surface).
• Use copper ground planes (possible stitching) and top-layer copper floods (surround circuitry with
ground floods)
• Use a 4-layer PCB, if economically feasible (for better grounding)
• Minimize the amount of copper area associated with input traces (to minimize radiated pickup)
• Hide copper associated with switching nodes under shielded magnetics, where possible
• Heat sink the quiet side of components instead of the switching side, where possible (like the output
side of inductor)
• Use Bob Smith terminations, Bob Smith EFT capacitor, and Bob Smith plane
• Use Bob Smith plane as ground shield on input side of PCB (creating a phantom or literal earth
ground)
• Use LC filter at DC/DC input
• Dampen high-frequency ringing on all switching nodes, if present (allow for possible snubbers)
• Control rise times with gate-drive resistors and possibly snubbers
• Switching frequency considerations
• Use of EMI bridge capacitor across isolation boundary (isolated topologies)
• Observe the polarity dot on inductors (embed noisy end)
• Use of ferrite beads on input (allow for possible use of beads or 0-Ωresistors)
• Maintain physical separation between input-related circuitry and power circuitry (use ferrite beads as
boundary line)
• Balance efficiency versus acceptable noise margin
• Possible use of common-mode inductors
• Possible use of integrated RJ-45 jacks (shielded with internal transformer and Bob Smith terminations)
• End-product enclosure considerations (shielding)
• countless

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8 Bill of Materials
Table 4. TPS2378EVM-602 BOM
Designator Quantity Value Description Package Reference Part Number Manufacturer
C1, C17 2 2200pF CAP, CERM, 2200pF, 2000V, +/-10%, X7R, 1812 1812 C4532X7R3D222K TDK
C2, C6, C34, C36 4 0.1uF CAP, CERM, 0.1uF, 100V, +/-10%, X7R, 0805 0805 C0805C104K1RACTU Kemet
C3 1 CAP, CERM, 2.2uF, 100V, +/-10%, X7R, 1210 1210 HMK325B7225KN-T Taiyo Yuden
C4, C5 2 2.2uF CAP, CERM, 2.2uF, 100V, +/-10%, X7R, 1210 1210 HMK325B7225KN-T Taiyo Yuden
C7 1 68uF CAP, AL, 68uF, 25V, +/-20%, 0.36 ohm, SMD SMT Radial D EEE-FK1E680P Panasonic
C8, C9, C10 3 10uF CAP, CERM, 10uF, 25V, +/-20%, X5R, 1210 1210 C3225X5R1E106K TDK
C11, C22, C23 3 1uF CAP, CERM, 1uF, 25V, +/-10%, X5R, 0805 0805 08053D105KAT2A AVX
C12 1 470pF CAP, CERM, 470pF, 100V, +/-5%, X7R, 0603 0603 06031C471JAT2A AVX
C13 1 100pF CAP, CERM, 100pF, 50V, +/-5%, C0G/NP0, 0603 0603 C1608C0G1H101J TDK
C14 1 22uF CAP, AL, 22uF, 25V, +/-20%, 0.7 ohm, SMD SMT Radial C EEE-FK1E220R Panasonic
C15, C16 2 0.47uF CAP, CERM, 0.47uF, 16V, +/-10%, X7R, 0603 0603 C0603C474K4RACTU Kemet
C18 1 0.01uF CAP, CERM, 0.01uF, 50V, +/-5%, X7R, 0603 0603 C0603C103J5RACTU Kemet
C19 1 47pF CAP, CERM, 47pF, 50V, +/-5%, C0G/NP0, 0603 0603 06035A470JAT2A AVX
C20 1 1uF CAP, CERM, 1uF, 16V, +/-10%, X5R, 0603 0603 C0603C105K4PACTU Kemet
C21 1 0.047uF CAP, CERM, 0.047 µF, 50 V, +/- 10%, X7R, 0603 0603 GRM188R71H473KA61D Murata
C24 1 0.039uF CAP, CERM, 0.039 µF, 25 V, +/- 10%, X7R, 0603 0603 06033C393KAT2A AVX
C25, C32 2 1000pF CAP, CERM, 1000pF, 2000V, +/-10%, X7R, 1210 1210 C1210C102KGRACTU Kemet
C26, C27, C28, C29, C37,
C38 6 0.01uF CAP, CERM, 0.01uF, 100V, +/-10%, X7R, 0603 0603 06031C103KAT2A AVX
C30, C31 2 1000pF CAP, CERM, 1000pF, 100V, +/-10%, X7R, 0603 0603 06031C102KAT2A AVX
C33, C35 2 47uF CAP, AL, 47uF, 63V, +/-20%, 0.65 ohm, SMD SMT Radial F EEE-FK1J470P Panasonic
C39 1 2.2uF CAP, CERM, 2.2 µF, 50 V, +/- 10%, X5R, 0805 0805 C2012X5R1H225K125AB TDK
C40, C41 2 0.1uF CAP, CERM, 0.1 µF, 50 V, +/- 10%, X7R, 0603 0603 06035C104KAT2A AVX
D1 1 200V Diode, Ultrafast, 200V, 1A, SMA SMA MURA120T3G ON Semiconductor
D2, D5 2 100V Diode, Switching, 100V, 0.2A, SOD-123 SOD-123 MMSD4148T1G ON Semiconductor
D3 1 Yellow LED, Yellow, SMD Power TOPLED LY E6SF-AABA-46-1-Z OSRAM
D4, D6, D7 3 30V Diode, Schottky, 30V, 0.2A, SOT-23 SOT-23 BAT54S-7-F Diodes Inc.
D8, D9, D10, D11, D12,
D13, D14, D15 8 100V Diode, Schottky, 100V, 3A, SMC SMC B3100-13-F Diodes Inc.
D16 1 LED, Orange, SMD Power TOPLED LO E6SF-ABCB-24-1-Z OSRAM
D17, D19 2 58V Diode, TVS, Uni, 58V, 400W, SMA SMA SMAJ58A Diodes Inc.
D18 1 Orange LED, Orange, SMD Power TOPLED LO E6SF-ABCB-24-1-Z OSRAM
D20 1 Diode, Schottky, 100V, 0.15A, SOD-123 SOD-123 BAT46W-7-F Diodes Inc.
D21, D22 2 100V Diode, Schottky, 100V, 0.15A, SOD-123 SOD-123 BAT46W-7-F Diodes Inc.
H1, H2, H3, H4 4 Bumpon, Hemisphere, 0.375 X 0.235, Black Black Bumpon SJ61A2 3M

Bill of Materials www.ti.com
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TPS2378EVM-602 Evaluation Module
Table 4. TPS2378EVM-602 BOM (continued)
Designator Quantity Value Description Package Reference Part Number Manufacturer
J1 1 Terminal Block, 6A, 3.5mm Pitch, 2-Pos, TH 7.0x8.2x6.5mm ED555/2DS On-Shore Technology
J2, J5, J7, J11 4 Header, 100mil, 2x1, Gold plated, TH Header, 2x1, 100mil 5-146261-1 TE Connectivity
J3, J4 2 RJ-45, Right Angle, No LED, tab up RJ-45 Jack 1-406541-1 AMP
J6 1 Header, TH, 100mil, 4x1, Gold plated, 230 mil above
insulator 4x1 Header TSW-104-07-G-S Samtec
L1 1 3.3uH Inductor, Shielded Drum Core, Ferrite, 3.3uH, 1.9A,
0.08 ohm, SMD LPS4018 LPS4018-332MLB Coilcraft
L2 1 400nH Inductor, Shielded, Composite, 400nH, 12.5A, 0.01
ohm, SMD 4x2.1x4mm XAL4020-401MEB Coilcraft
L3, L4, L5, L6 4 100 ohm 4A Ferrite Bead, 100 ohm @ 100MHz, SMD 0805 MPZ2012S101A Murata
Q1 1 150V MOSFET, N-CH, 150V, 4.6A, PQFN08A PQFN08A FDMS86252 Fairchild Semiconductor
Q2, Q4 2 0.25V Transistor, PNP, 40V, 0.2A, SOT-23 SOT-23 MMBT3906 Fairchild Semiconductor
Q3, Q8, Q9 3 100V MOSFET, N-CH, 100V, 26A, PowerPAK SO-8 PowerPAK SO-8 FDMS86105 Fairchild Semiconductor
Q5 1 0.25V Transistor, NPN, 140V, 0.6A, SOT-23 SOT-23 MMBT5550LT1G ON Semiconductor
Q6, Q7 2 100V MOSFET, N-CH, 100V, 0.17A, SOT-23 SOT-23 BSS123 Fairchild Semiconductor
Q10 1 40V MOSFET, N-CH, 40 V, 15 A, SON 5x6mm SON 5x6mm CSD18504Q5A Texas Instruments
R1 1 39k RES, 39k ohm, 5%, 0.25W, 1206 1206 CRCW120639K0JNEA Vishay-Dale
R2 1 4.7 RES, 4.7 ohm, 5%, 0.1W, 0603 0603 CRCW06034R70JNEA Vishay-Dale
R3, R47, R54 3 10.0k RES, 10.0 k, 1%, 0.1 W, 0603 0603 CRCW060310K0FKEA Vishay-Dale
R4 1 0.1 RES, 0.1, 1%, 2 W, 2512 2512 CSRN2512FKR100 Stackpole Electronics Inc
R5 1 1.00k RES, 1.00k ohm, 1%, 0.1W, 0603 0603 CRCW06031K00FKEA Vishay-Dale
R6 1 10 RES, 10 ohm, 5%, 1W, 2512 2512 ERJ-1TYJ100U Panasonic
R7 1 20.0 RES, 20.0 ohm, 1%, 0.1W, 0603 0603 CRCW060320R0FKEA Vishay-Dale
R8 1 20.0 RES, 20.0 ohm, 1%, 0.125W, 0805 0805 CRCW080520R0FKEA Vishay-Dale
R9, R12 2 121k RES, 121k ohm, 1%, 0.1W, 0603 0603 CRCW0603121KFKEA Vishay-Dale
R10 1 2.61k RES, 2.61k ohm, 1%, 0.1W, 0603 0603 CRCW06032K61FKEA Vishay-Dale
R11, R18, R19, R38, R39 5 10.0k RES, 10.0k ohm, 1%, 0.1W, 0603 0603 CRCW060310K0FKEA Vishay-Dale
R13 1 4.22k RES, 4.22k ohm, 1%, 0.1W, 0603 0603 CRCW06034K22FKEA Vishay-Dale
R14 1 0 RES, 0 ohm, 5%, 0.1W, 0603 0603 CRCW06030000Z0EA Vishay-Dale
R15 1 7.50k RES, 7.50k ohm, 1%, 0.1W, 0603 0603 ERJ-3EKF7501V Panasonic
R16 1 80.6k RES, 80.6k ohm, 1%, 0.1W, 0603 0603 CRCW060380K6FKEA Vishay-Dale
R17 1 3.83k RES, 3.83k ohm, 1%, 0.1W, 0603 0603 CRCW06033K83FKEA Vishay-Dale
R20 1 61.9k RES, 61.9k ohm, 1%, 0.1W, 0603 0603 CRCW060361K9FKEA Vishay-Dale
R21, R40, R41, R48, R56 5 100k RES, 100k ohm, 1%, 0.1W, 0603 0603 CRCW0603100KFKEA Vishay-Dale
R22 1 1.21Meg RES, 1.21 M, 1%, 0.1 W, 0603 0603 CRCW06031M21FKEA Vishay-Dale
R23 1 49.9k RES, 49.9k ohm, 1%, 0.1W, 0603 0603 CRCW060349K9FKEA Vishay-Dale
R24 1 200k RES, 200 k, 1%, 0.1 W, 0603 0603 CRCW0603200KFKEA Vishay-Dale
R25 1 6.81k RES, 6.81 k, 1%, 0.1 W, 0603 0603 CRCW06036K81FKEA Vishay-Dale

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17
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TPS2378EVM-602 Evaluation Module
Table 4. TPS2378EVM-602 BOM (continued)
Designator Quantity Value Description Package Reference Part Number Manufacturer
R26 1 7.5k RES, 7.5k ohm, 5%, 0.1W, 0603 0603 CRCW06037K50JNEA Vishay-Dale
R27 1 2.00k RES, 2.00 k, 1%, 0.1 W, 0603 0603 CRCW06032K00FKEA Vishay-Dale
R28, R29, R30, R31, R32,
R33, R34, R35 8 75.0 RES, 75.0 ohm, 1%, 0.1W, 0603 0603 CRCW060375R0FKEA Vishay-Dale
R36, R37 2 5.6k RES, 5.6k ohm, 5%, 1W, 2512 2512 ERJ-1TYJ562U Panasonic
R42 1 30.1k RES, 30.1k ohm, 1%, 0.1W, 0603 0603 CRCW060330K1FKEA Vishay-Dale
R44, R52 2 63.4 RES, 63.4 ohm, 1%, 0.125W, 0805 0805 CRCW080563R4FKEA Vishay-Dale
R45 1 8.87k RES, 8.87k ohm, 1%, 0.1W, 0603 0603 CRCW06038K87FKEA Vishay-Dale
R46, R53 2 49.9k RES, 49.9 k, 1%, 0.1 W, 0603 0603 CRCW060349K9FKEA Vishay-Dale
R49, R55 2 24.9k RES, 24.9k ohm, 1%, 0.1W, 0603 0603 CRCW060324K9FKEA Vishay-Dale
R51 1 78.7k RES, 78.7k ohm, 1%, 0.125W, 0805 0805 ERJ-6ENF7872V Panasonic
R57 1 12.1k RES, 12.1 k, 1%, 0.1 W, 0603 0603 CRCW060312K1FKEA Vishay-Dale
R58 1 33.2k RES, 33.2 k, 1%, 0.1 W, 0603 0603 CRCW060333K2FKEA Vishay-Dale
R60 1 47.5k RES, 47.5 k, 1%, 0.1 W, 0603 0603 CRCW060347K5FKEA Vishay-Dale
R61 1 1.43k RES, 1.43 k, 1%, 0.1 W, 0603 0603 CRCW06031K43FKEA Vishay-Dale
R62, R63 2 25.5k RES, 25.5 k, 1%, 0.1 W, 0603 0603 CRCW060325K5FKEA Vishay-Dale
SH-J1, SH-J2, SH-J3, SH-J4 4 1x2 Shunt, 100mil, Gold plated, Black Shunt 969102-0000-DA 3M
T1 1 62uH Transformer, 62uH, SMT 26.4x13.7x32mm 750315775 Wurth Elektronik
T2 1 1.2mH Transformer, Gate Drive, 1.2mH, SMT 9.02x7.62x8.64mm PA0184NLT Pulse Engineering
T3 1 350uH TRANSFORMER/CMC MOD, GIGABIT POE+, SMT 12.2X6.6X18.16 mm H6096NL Pulse Engineering
TP1, TP3, TP5, TP6, TP8,
TP9, TP10, TP11, TP12,
TP13, TP14, TP15, TP17,
TP20
14 SMT Test Point, Miniature, SMT Testpoint_Keystone_Miniature 5015 Keystone
TP2, TP4, TP7, TP16, TP18,
TP19 6 Test Point, Miniature, SMT Test Point, Miniature, SMT 5019 Keystone
U1, U7 2 Optocoupler, 3.75kV RMS, SMT Mini Flat Package HMHA2801A Fairchild Semiconductor
U2 1 PRECISION PROGRAMMABLE REFERENCE,
DBV0005A DBV0005A TL431AIDBV Texas Instruments
U3, U4 2 IEEE 802.3at PoE High-Power PD Interface,
DDA0008E DDA0008E TPS2378DDA Texas Instruments
U5, U8 2 Optocoupler, 5kV RMS, SMT DIP-4L Gullwing FOD817DS Fairchild Semiconductor
U6 1 Advanced Active Clamp PWM Controller with Current Control, -40 to +125 degC, 20-pin TSSOP (PW),
Green (RoHS & no Sb/Br) PW0020A UCC2897APW Texas Instruments
U9 1 SUPPLY-VOLTAGE SUPERVISOR, DGK0008A DGK0008A TL7700CDGKR Texas Instruments
FID1, FID2, FID3 0 Fiducial mark. There is nothing to buy or mount. Fiducial N/A N/A
J8 0 Receptacle, 100mil, 4x1, TH 4x1 Receptacle 76308-204LF FCI
J9, J10 0 Receptacle 100mil 2x1, Tin, TH Receptacle, 2x1, 100mil, Tin PPTC021LFBN-RC Sullins Connector Solutions
R43 0 0 RES, 0 ohm, 5%, 0.1W, 0603 0603 CRCW06030000Z0EA Vishay-Dale

Bill of Materials www.ti.com
18 SLVUAG7A–May 2015–Revised July 2017
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TPS2378EVM-602 Evaluation Module
Table 4. TPS2378EVM-602 BOM (continued)
Designator Quantity Value Description Package Reference Part Number Manufacturer
R50 0 20.0k RES, 20.0k ohm, 1%, 0.1W, 0603 0603 CRCW060320K0FKEA Vishay-Dale
R59 0 100 RES, 100, 1%, 0.1 W, 0603 0603 CRCW0603100RFKEA Vishay-Dale

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Revision History
Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Original (May 2015) to A Revision ........................................................................................................... Page
• Changed T1 transformer in the BOM from PA4036NL (Pulse Engineering), to 750315775 (Wurth Elektronik). ........... 15

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