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TPS2378EVM-602
User Manual
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Texas Instruments TPS2378EVM-602 User Manual

User's Guide
SLVUAG7A–May 2015–Revised July 2017
TPS2378EVM-602 Evaluation Module
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
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.
SLVUAG7A–May 2015–Revised July 2017
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List of Tables
Copyright © 2015–2017, Texas Instruments Incorporated
TPS2378EVM-602 Evaluation Module
1
Introduction
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
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 Operating Voltage
Input UVLO, POE input J1
Detection voltage Classification voltage Classification current
Operating current-limit
DC/DC Converter
Output Voltage 42.5 ≤ VIN≤ 57 V, I Output Current 42.5 ≤ VIN≤ 57 V 19-V output 2.9 A Output ripple voltage, pk-to-pk VIN= 48 V, I Efficiency, dc-dc converter VIN= 48 V, I Efficiency, end- to-end VIN= 48 V, I Switching frequency 225 270 kHz
(1)
Per TPS2378 PD
(1)
(1)
(1)
(1)
(1)
(1)
(1)
After start up. 30 57 Rising input voltage 40 Falling input voltage 30 at device terminals 1.4 10.1 at device terminals 11.9 23.0 R
= 63.4 Ω 38 42
class
100 180 850 1200
≤ I
LOAD
= 2.9 A 19-V output 225 mV
LOAD
= 2.9 A 93%
LOAD
= 2.9 A 19-V output 90%
LOAD
(max) 19-V output 19.01 19.04 19.07 V
LOAD
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V
mAInrush current-limit
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.
2
TPS2378EVM-602 Evaluation Module
Copyright © 2015–2017, Texas Instruments Incorporated
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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 D 9
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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Schematic
3
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TPS2378EVM-602 Evaluation Module
4 Schematic
Figure 1. TPS2378EVM-602 PD Front-End Schematic
UPOE OUTPUT 60WMAX
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
VSS4RTN
5
CDB
6
T2P
7
APD
8
PWPD
9
U3
TPS2378DDA
VDD
1
DEN
2
CLS
3
VSS4RTN
5
CDB
6
T2P
7
APD
8
PWPD
9
U4
TPS2378DDA
1
2
4
3
FOD817DS
U5
1
2
4
3
FOD817DS
U8
58V
SMAJ58A
D17
BSS123Q6BSS123
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
MMBT5550LT1G
Q5
1
2
4
3
HMHA2801A
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
Schematic
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TPS2378EVM-602 Evaluation Module
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
2.2µFC32.2µFC42.2µFC539k
R1
MURA120T3G
D1
2200pF
C1
4.7
R2
MMSD4148T1G
D2
MMSD4148T1G
D5
4
7,8
1,2,3
5,6,
FDMS86252
Q1
MMBT3906
Q2
MMBT3906
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
10µFC810µFC910µF
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
RSLOPE10FB
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
HMHA2801A
U1
J2
LPS4018-332MLB
L1
1
3
12
11
567
8 9
10
T1
L2
3
4
5
NC1NC
2
U2 TL431AIDBV
4
7,8
1,2,3
5,6,
Q10 CSD18504Q5A
1
2
J11
LoadDelayDisable
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
7
NC
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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Schematic
5
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TPS2378EVM-602 Evaluation Module
Figure 3. TPS2378EVM-602 DCDC Converter Section
General Configuration and Description
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
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6
TPS2378EVM-602 Evaluation Module
Copyright © 2015–2017, Texas Instruments Incorporated
SLVUAG7A–May 2015–Revised July 2017
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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.
General Configuration and Description
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
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TPS2378EVM-602 Evaluation Module
7
2 ms/div
500 mV/div
1 A/div
50 ms/div
20 V/div
200 mA/div
TPS2378EVM-602 Performance Data
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
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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
8
TPS2378EVM-602 Evaluation Module
Copyright © 2015–2017, Texas Instruments Incorporated
SLVUAG7A–May 2015–Revised July 2017
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