Texas Instruments TPS2372-4EVM-006 User Manual
User's Guide
SLVUB75A–August 2017–Revised September 2017
TPS2372-4EVM-006 Evaluation Module
This user’s guide describes the TPS2372-4 evaluation module (TPS2372-4EVM-006). The TPS23724EVM-006 contains evaluation and reference circuitry for the TPS2372-4. The TPS2372-4 device is an
IEEE 802.3bt compliant, powered-device (PD) controller optimized for high power, power-over-Ethernet
(PoE) PD applications such as LED lighting and high-power module applications.
Contents
1 Introduction ................................................................................................................... 2
1.1 Features.............................................................................................................. 2
1.2 Applications.......................................................................................................... 2
2 Electrical Specifications..................................................................................................... 2
3 Description.................................................................................................................... 2
4 Schematic..................................................................................................................... 3
5 General Configuration and Description ................................................................................... 5
5.1 Physical Access..................................................................................................... 5
6 TPS2372-4EVM-006 Performance Data ................................................................................. 6
7 EVM Assembly Drawing and Layout Guidelines ........................................................................ 8
7.1 PCB Drawings....................................................................................................... 8
7.2 Layout Guidelines ................................................................................................. 11
7.3 EMI Containment.................................................................................................. 12
8 Bill of Material............................................................................................................... 13
List of Figures
1 TPS2372-4EVM-006 Front End Interface Schematic................................................................... 3
2 TPS2372-4EVM-006 PD Controller Schematic ......................................................................... 4
3 Startup using.bt PSE and Autoclass Enabled ........................................................................... 6
4 PD Startup With Delay...................................................................................................... 6
5 Current-Limit Protection Performance .................................................................................... 6
6 Auto MPS ..................................................................................................................... 7
7 Top Side Component Placement.......................................................................................... 8
8 Top Side Routing ............................................................................................................ 8
9 Layer 2 Routing .............................................................................................................. 9
10 Layer 3 Routing .............................................................................................................. 9
11 Bottom Side Routing....................................................................................................... 10
12 Bottom Component Placement........................................................................................... 10
List of Tables
1 TPS2372-4EVM-006 Electrical and Performance Specifications at 25°C............................................ 2
2 Connector Functionality..................................................................................................... 5
3 Test Points.................................................................................................................... 5
4 TPS2372-4EVM-006 BOM ............................................................................................... 13
SLVUB75A–August 2017–Revised September 2017
Submit Documentation Feedback
Copyright © 2017, Texas Instruments Incorporated
TPS2372-4EVM-006 Evaluation Module
1
Introduction
1 Introduction
The TPS2372-4EVM-006 allows reference circuitry evaluation of the TPS2372-4. It contains input and
output power connectors and an array of on-board test points for circuit evaluation.
1.1 Features
The TPS2372-4EVM-006 features include:
• High-power PoE
• Selectable classification
• Adjustable auto MPS
• Gigabit Ethernet pass-through interface
1.2 Applications
The TPS2372-4EVM-006 can be used in the following applications:
• Power-over-Ethernet (PoE) lighting
• Internet of Things (IoT)
• PoE modules
2 Electrical Specifications
Table 1 lists the EVM electrical specifications.
www.ti.com
Table 1. TPS2372-4EVM-006 Electrical and Performance Specifications at 25°C
Parameter Test Conditions Min Typ Max Unit
Power Interface
Input voltage Applied to the power pins of connectors
Input UVLO, PoE input J1
Detection voltage At device terminals 3 10 V
Classification voltage At device terminals 10 23 V
Classification current
Inrush current-limit 275 395 mA
Operating current-limit 1.9 2.5 A
Adatper voltage 42.5 57 V
3 Description
The TPS2372-4EVM-006 enables full evaluation of the TPS2372-4 device, see the schematic in Figure 1.
Ethernet power is applied from J1 and is dropped to the FET bridge rectifier. At the output of the FET
bridge is the EMI/EMC filter and transient protection for the TPS2372-4.
Input power can also be applied at J3 from a DC source when power at J1 is not present.
The TPS2372-4 (U1) PD controller is shown in Figure 1. R23 provides the detection signature. To the right
of U2 is the switched side of the PD controller. The TPS2372-4 RTN pin provides inrush limited turn on
and the charge of the bulk capacitor C11.
J2 or J4
0 57 V
Rising input voltage 36 V
Falling input voltage 30 V
RclassA = 63.4 Ω 38 42 mA
RclassB = 90.9 Ω 26.5 29.3 mA
2
TPS2372-4EVM-006 Evaluation Module
SLVUB75A–August 2017–Revised September 2017
Copyright © 2017, Texas Instruments Incorporated
Submit Documentation Feedback
1000pF
C9
1000pF
C10
VDD
VSS1
2
1
58V
D3
1000pF
C7
1000pF
C8
42.5-57VDC
GND
D1
300 ohm
L1
300 ohm
L3
300 ohm
L4
300 ohm
L6
1
2
J3
RTN
75.0
R1
75.0R275.0R375.0
R4
ETHERNET POWER
42.5-57VDC
71W MAX
DATA PORT
PR12 PR36 PR45 PR78
EARTH
TCT1
1
TD1+
2
TD1-
3
TCT2
4
TD2+
5
TD2-
6
TCT3
7
TD3+
8
TD3-
9
TCT4
10
TD4+
11
TD4-
12
MX4-
13
MX4+
14
MCT4
15
MX3-
16
MX3+
17
MCT3
18
MX2-
19
MX2+
20
MCT2
21
MX1-
22
MX1+
23
MCT4
24
T1
7490220122
PR12
PR36
PR45
PR78
TP1 TP2 TP3 TP4
PAIR12 PAIR36 PAIR45 PAIR78
EARTH
TP5
1000pF
C5
2
3
4
1
5
6
7
8
9
10
11
12
J2
EARTH
EARTH
75.0
R8
75.0R575.0
R7
75.0
R6
EARTH
1
2
3
4
L5
DNP
1
2
3
4
L2
DNP
131415
16
1
2
3
4
5
678
9
10
11
12
Q1
PR12
PR36
20.0k
R14
20.0k
R13
6.8k
R9
6.8k
R10
8.2k
R11
8.2k
R12
3
1
2
Q2
3
1
2
Q3
12V
D2
131415
16
1
2
3
4
5
678
9
10
11
12
Q4
6.8k
R15
6.8k
R16
8.2k
R17
8.2k
R18
3
1
2
Q5
3
1
2
Q6
PR45
PR78
BR_OFF
BR_OFF
BR_OFF
BR_OFF
BR_OFF
0.01µFC10.01µFC20.01µFC30.01µF
C4
1000pF
C6
D7
2
3
4
1
5
6
7
8
9
10
11
12
J1
Copyright © 2017, Texas Instruments Incorporated
www.ti.com
Schematic
3
SLVUB75A–August 2017–Revised September 2017
Submit Documentation Feedback
Copyright © 2017, Texas Instruments Incorporated
TPS2372-4EVM-006 Evaluation Module
4 Schematic
Figure 1 and Figure 2 illustrate the TPS2372-4EVM-006 schematics.
Figure 1. TPS2372-4EVM-006 Front End Interface Schematic
VDD
VSS1
63.4
R24
AUTCLS
Yellow
D4
TPH
TPL
BT
49.9k
R26
MPS_DUTY
MPS_DUTY
AUTCLS
VSS
VSS
123
J4
TSM-103-01-L-SV-P-TR
VSS
53.6k
R22
VSS
49.9k
R34
IRSHDL_EN
IRSHDL_EN
RTN
Yellow
D5
Yellow
D6
TPH TPL BT
47µF
C12
DNP
90.9
R27
21.0k
R19
21.0k
R20
21.0k
R21
2k
R33
1.0k
R32
TP9
TP14
VDD
VSS1
Port Current
Class 8
Class 7
Class 6
Class 5
TP12
AMPS_CTL
AMPS_Connect
TP11
PG
TP13
RTN
TPH TPL BT
63.4
R31
123456789
10
J9
Class 4
4-Pair
90.9
R25
Class 4
Class 3
TP10
VDD
TP15
VSS
0.1µF
C13
J10
J11
J5 J6
TP6 TP7 TP8
123
4
J8
VDD
1
DEN
2
CLS1
3
VSS
4
VSS
5
CLS2
6
REF
7
AMPS_CTL
8
MPS_DUTY
9
AUTCLS
10
RTN
11
RTN
12
PG
13
NC
14
NC
15
IRSHDL_EN
16
TPL
17
TPH
18
BT
19
NC
20
PAD
21
U1
TPS2372-4RGWR
24.9k
R23
1.21k
R30
249
R29
140
R28
1
2
J7
VDD
RTN
RTN
100µF
C11
Copyright © 2017, Texas Instruments Incorporated
Schematic
www.ti.com
4
SLVUB75A–August 2017–Revised September 2017
Submit Documentation Feedback
Copyright © 2017, Texas Instruments Incorporated
TPS2372-4EVM-006 Evaluation Module
Figure 2. TPS2372-4EVM-006 PD Controller Schematic
www.ti.com
5 General Configuration and Description
5.1 Physical Access
Table 2 lists the EVM connector functionality and Table 3 describes the test point availability.
Table 2. Connector Functionality
Connector Label Description
J1 ETHERNET
POWER
J2 DATA Ethernet data pass-through. Connect to downstream Ethernet device.
J7 Output Output connector to load
J3 AdapterInput DC Adapter input. Connect to DC power supply.
J4 MPS_Duty Automatic MPS duty cycle selection
J5 /AUTCLS Jump to enable autoclass
J6 IRSHDL_EN Jump to disable inrush delay
J8 CLSA Jump to select Class current level
J9 CLSB Jump to select Class current level
J10 Port Current Jump connect PD front end and PD controller circuits
J11 AMPS_Conn
ect
PoE input. Connect to PSE power and data source.
Jump to add auto MPS current
General Configuration and Description
Table 3. Test Points
Test Point Label Description
TP1 PAIR 12 Data pair from pins 1 and 2 of J1
TP2 PAIR 36 Data pair from pins 3 and 6 of J1
TP3 PAIR 45 Spare pair from pins 4 and 5 of J1
TP4 PAIR 78 Spare pair from pins 7 and 8 of J1
TP5 EARTH Connect to earth ground, when available
TP6 TPH TPH output of the TPS2372-4
TP7 TPL TPL output of the TPS2372-4
TP8 BT BT output of the TPS2372-4
TP9, TP10 VDD Input voltage of PD system
TP11 PG Power Good output fo the TPS2372-4
TP12 AMPS_CTL AMPS_CTL output voltage
TP13 RTN Load side return voltage
TP14 VSS1 EMI filter return side voltage
TP15 VSS PD side return voltage
SLVUB75A–August 2017–Revised September 2017
Submit Documentation Feedback
Copyright © 2017, Texas Instruments Incorporated
TPS2372-4EVM-006 Evaluation Module
5
PG
VDD-VSS
IIH
RTH-VSS
PG
VDD-VSS
RTH-VSS
IIN
RTN-VSS
VDD-VSS
IIN
TPS2372-4EVM-006 Performance Data
6 TPS2372-4EVM-006 Performance Data
Figure 3 through Figure 6 illustrate EVM performance waveforms.
Figure 3. Startup !~using!~With!~.bt PSE!~ and Autoclass Enabled
www.ti.com
Figure 4. PD Startup With Delay
Figure 5. Current-Limit Protection Performance
6
TPS2372-4EVM-006 Evaluation Module
SLVUB75A–August 2017–Revised September 2017
Copyright © 2017, Texas Instruments Incorporated
Submit Documentation Feedback
IIN
www.ti.com
TPS2372-4EVM-006 Performance Data
Figure 6. Auto MPS
SLVUB75A–August 2017–Revised September 2017
Submit Documentation Feedback
Copyright © 2017, Texas Instruments Incorporated
TPS2372-4EVM-006 Evaluation Module
7
Loading...