Texas Instruments TPS23861EVM-612 User manual

User's Guide
SLUUAY8C–March 2014–Revised November 2015
TPS23861EVM-612: Auto-Mode Evaluation Module for
TPS23861
This user’s guide describes the evaluation modules (EVM) for the TPS23861 (TPS23861EVM-612). The
EVM contains evaluation and reference circuitry for the TPS23861. The TPS23861 is a Power-over-
Ethernet (PoE) device for power sourcing equipment (PSE).
Contents
1 Description.................................................................................................................... 3
2 Quick Start.................................................................................................................... 3
3 General Use Features....................................................................................................... 8
4 TPS23861EVM-612 PI Commander GUI Setup ....................................................................... 10
5 EVM Schematic, Layout Guidelines and PCB Assembly, Layer Plots.............................................. 21
6 Bill of Materials ............................................................................................................. 29
Appendix A Revision A Schematic ............................................................................................ 33
List of Figures
1 Basic Test Setup............................................................................................................. 5
2 Basic Setup Using USB-TO-GPIO ........................................................................................ 6
3 Advanced Setup Using LaunchPad ....................................................................................... 7
4 PI Commander Device Menu Window................................................................................... 10
5 PI Commander Device Selection Window .............................................................................. 10
6 Devices Found in Scan.................................................................................................... 11
7 Detected Devices Selection............................................................................................... 11
8 Device Selector Approval ................................................................................................. 11
9 Telemetry Page............................................................................................................. 12
10 PD Detection................................................................................................................ 13
11 Telemetry Data Collection and Graphs.................................................................................. 14
12 Telemetry Data Collection and Graphs, Device 2...................................................................... 15
13 High-Level Status, 2 Devices............................................................................................. 15
14 I2C Register Page.......................................................................................................... 16
15 Device Configuration Page................................................................................................ 17
16 Configuration Wizard....................................................................................................... 17
17 Hit 'S' to Start ............................................................................................................... 18
18 Program Started............................................................................................................ 19
19 Terminal Response with Connected Ports.............................................................................. 19
20 TPS23861 POE Documentation.......................................................................................... 20
21 TPS23861EVM-612 (Motherboard) Schematic: Control .............................................................. 21
22 TPS23861EVM-612 (Motherboard) Schematic: Power Ports ........................................................ 22
23 TPS23861EVM-613 (Daughterboard) Schematic...................................................................... 23
24 TPS23861EVM-612 (Motherboard) Top Side Assembly.............................................................. 24
25 TPS23861EVM-612 (Motherboard) Top Side Routing ................................................................ 25
26 TPS23861EVM-612 (Motherboard) Layer 2 Routing.................................................................. 25
27 TPS23861EVM-612 (Motherboard) Layer 3 Routing.................................................................. 26
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28 TPS23861EVM-612 (Motherboard) Bottom Side Routing ............................................................ 26
29 TPS23861EVM-613 (Daughterboard) Top Side Assembly........................................................... 27
30 TPS23861EVM-613 (Daughterboard) Top Side Routing ............................................................. 27
31 TPS23861EVM-613 (Daughterboard) Bottom Side Routing.......................................................... 28
32 TPS23861EVM-613 (Daughterboard) Bottom Side Assembly ....................................................... 28
33 TPS23861EVM-612 (Motherboard) Schematic: Control .............................................................. 33
List of Tables
1 TPS23861EVM-612 Voltage Rail Current Requirements .............................................................. 4
2 EVM Input/Output Connectors ............................................................................................. 8
3 EVM LEDs.................................................................................................................... 8
4 EVM Test Points............................................................................................................. 9
5 EVM Jumpers ................................................................................................................ 9
6 TPS23861EVM-612 Bill of Materials..................................................................................... 29
7 TPS23861EVM-613 Bill of Materials..................................................................................... 30
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www.ti.com Description
1 Description
The TPS23861EVM-612 features the quad port, TPS23861, IEEE 802.3at PoE PSE controller. The EVM
consists of a motherboard (TPS23861EVM-612) and daughter board (TPS23861EVM-613) containing two
TPS23861 devices. The TPS23861EVM-612 provides a multi-port base platform interface for
TPS23861EVM-613, MSP-EXP430G2 (LaunchPad™), and USB-TO-GPIO (USB Interface Adapter).
1.1 Features
• TPS23861 PSE devices default to auto-mode operation so no operator interface over I2C is required.
• Four IEEE802.3at, Type 2 (30 W) ports with 1000BASE-T (gigabit Ethernet data pass through)
• Two non-standard, high power ports with 1000BASE-T (gigabit Ethernet data pass through)
• Fully certified using UNH-IOL Clause #33 PSE Conformance Test Suite
• Single DC power supply input
• On board 3.3-V regulator
• On board I2C interface to both TPS23861PW devices from either USB-TO-GPIO or MSP-EXP430G2.
• Port ON status LEDs
• User test points
1.2 Applications
• Ethernet switches and routers
• Surveillance VDRs
• High power PoE
• PoE pass-through systems
2 Quick Start
2.1 Input Power
2.1.1 Input Power (Labeled VPWR)
DC input voltage is provided through J1 (screw jack). A dc power supply or laptop adapter with sufficient
current capacity can power the EVM.
CAUTION
Reverse voltage protection is not provided; ensure that the correct polarity is
applied to J1.
This dc input is labeled VPWR in the schematics and is used for port VBUS as well as for the TPS23861
devices. The VPWR connections to the PoE ports are not fused. Each two pair port is capable of
furnishing at least 30 W and each four pair port can furnish 60 W. The power supply requirements are
summarized in Table 1.
The minimum PSE port voltage is 44 VDC for type 1 and 50 V for type 2. The nominal dc voltage at
VPWR is 48 VDC for a type 1 and 54 VDC for a type 2. During evaluation, choose the appropriate dc
power supply for the type 1 or type 2 environment.
LaunchPad, Code Composer Studio are trademarks of Texas Instruments.
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2.1.2 Local 3.3 V (Labeled 3.3V)
Local 3.3 V for local devices (labeled as 3.3V) is provided by the on-board LM5019 buck converter. The
LM5019 provides a basic power-on sequence and provides a well-controlled and consistent startup in
order to prevent erratic operation. This is described in detail in SLVA723. In addition to 48 V, the
TPS23861 requires 3.3 V for the digital circuitry and this is routed up to TPS23861EVM-613 over the
connector interface. The current consumption is 25-mA typical and 30-mA maximum.
2.1.3 External 3.3 V (Labeled 3.3V_USB)
The TPS23861EVM-612 provides galvanic isolation between PoE power side and host side using digital
isolators (ISO7241CD). The host side power is provided either from J2 (from USB-TO-GPIO) or J5 (from
LaunchPad). The current consumption is 3-mA typical and 5-mA maximum.
CAUTION
Do not use USB-TO-GPIO and LaunchPad simultaneously.
Table 1. TPS23861EVM-612 Voltage Rail Current Requirements
Voltage Rail Typical (mA) Maximum (mA)
3.3V_USB 2.5 3
3.3V 25 30
VPWR (Miscellaneous) 35 57
VPWR (8x Type 1 2992 3142
Output Ports)
VPWR (8x Type 2 5160 5418
Output Ports)
VPWR Total (8x Type 1 3027 3202
Ports)
VPWR Total (8x Type 2 5195 5478
Ports)
2.2 PoE Port Interfaces
The TPS23861 devices are pre-configured to operate in auto mode and, as such, no external
communication interface is required to enable or configure the TPS23861EVM-612. A standard PD can be
plugged into ports 1–4 and be expected to operate automatically.
2.2.1 Standard 30 W, IEEE802.3at Type 2 ports
Four standard ports are provided at J19, J20, J8, and J7 for two pair ports 1, 2, 3, and 4 respectively. The
power furnished is according to alternative A with MDI-X polarity.
2.2.2 Nonstandard 60-W Ports
Two non-standard ports are provided at J21 and J9 for four pair ports 1 and 2, respectively. The power
furnished is according to alternative A with MDI-X polarity and alternative B on a single port connector. A
standard PD may not power on at this interface, but a PD which can process power on all of the Ethernet
conductors (refer to TI application report, SLVA625) can power on and consume up to 60 W.
2.3 I2C Interfaces
Two I2C interfaces to the TPS23861 are provided on the EVM.
2.3.1 USB-TO-GPIO
J2 provides an interface with the USB-TO-GPIO adapter when using a PC and GUI.
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TPS23754EVM-420
Positive
Power Supply
Negative
J7
J1
J21
J9
TPS23861EVM-613
(+)
(-)
J8
J20 J19
D1
J2
TPS23861EVM-612
Ethernet
Cable
www.ti.com Quick Start
2.3.2 MSP-EXP430G2
J3, J4, and J5 provide an interface with the MSP-EXP430G2 or LaunchPad when using a PC to develop
custom power management code.
2.4 Basic Test Setup (Out-of-the-box Auto-Mode Operation)
Figure 1 shows the basic test setup for the TPS23861EVM. All that is required is a dc power supply
(44–57 VDC, 5 A), Ethernet patch cable, and any PD load.
Figure 1. Basic Test Setup
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TPS23754EVM-420
Positive
Power
Supply
Negative
J7
J1
J21
J9
TPS23861EVM-613
(+)
(-)
J8
J20 J19
D1
J2
USB-to-GPIO
TPS23861EVM-612
Ribbon
Cable
x
x
x
x
x
PC USB CABLE
Ethernet
Cable
Quick Start www.ti.com
2.5 Basic Test Setup Using USB-TO-GPIO for I2C Interface (Auto-Mode Operation with I2C
Monitoring)
An I2C interface is provided through J2 to the TPS23861PW devices on the TPS23861EVM-613. The
USB-TO-GPIO adapter (not included) can be used with any TI GUI which uses USB-TO-GPIO to read and
write over an I2C bus. Figure 2 illustrates the basic setup using USB-TO-GPIO.
Figure 2. Basic Setup Using USB-TO-GPIO
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TPS23754EVM-420
Positive
Power
Supply
Negative
J7
J1
J21
J9
TPS23861EVM-613
(+)
(-)
J8
J20 J19
D1
J2
TPS23861EVM-612
x
x
x
x
x
PC
USB CABLE
Ethernet
Cable
MSP-EXP430G2
www.ti.com Quick Start
2.6 Advanced Test Setup Using MSP-EX430G2 (LaunchPad)
The LaunchPad (not included) running a custom software program can communicate with the
TPS23861PW devices on the TPS23861EVM-613. Figure 3 shows the advanced setup using LaunchPad.
Figure 3. Advanced Setup Using LaunchPad
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General Use Features www.ti.com
3 General Use Features
3.1 EVM Input/Output Connectors and Switches
Table 2 lists the EVM input and output connectors.
Table 2. EVM Input/Output Connectors
Connector/Switch Label Description
J1 J1 DC power supply screw jack. (44–57 VDC, 5 A). Use a 48 VDC (nominal) for
type 1 and 54 VDC (nominal) for type 2 PSE operation.
J2 J2 Ribbon cable connection to USB-TO-GPIO adapter
J3 J3 LaunchPad Control (mates with LaunchPad J1)
J4 J4 LaunchPad I2C (mates with LaunchPad J2)
J5 J5 LaunchPad Power (mates with LaunchPad J6)
J6 J6 TPS23861EVM-613 Control (mates with TPS23861EVM-613 J3)
J17 J17 TPS23861EVM-613 Port 5-8 (mates with TPS23861EVM-613 J2)
J18 J18 TPS23861EVM-613 Port 1-4 (mates with TPS23861EVM-613 J1)
J22 J22 Two-pair port 1 data only
J19 2 Pair Port 1 Two-pair port 1 power and data
J23 J23 Two-pair port 2 data only
J20 2 Pair Port 2 Two-pair port 2 power and data
J11 J11 Two-pair port 3 data only
J8 2 Pair Port 3 Two-pair port 3 power and data
J10 J10 Two-pair port 4 data only
J7 2 Pair Port 4 Two-pair port 4 power and data
J24 J24 Four-pair port 1 data only
J21 4 Pair Port 1 Four -pair port 1 power and data
J12 J12 Four -pair port 2 data only
J9 4 Pair Port 2 Four -pair port 2 power and data
J29 J29 Chassis ground tie point
3.2 EVM LEDs
Table 3 lists the EVM LEDs and their descriptions.
Table 3. EVM LEDs
LED Color Label Description
D1 GREEN 48V 48-V ON indicator
D16 BLUE D16 Two-pair port 1 power is ON. For J19 supplier #1 (see the bill of materials (BOM)), J19 internal port LED
is active. For supplier #2, D16 is active.
D17 BLUE D17 Two-pair port 2 power is ON. For J20 supplier #1 (see the BOM), J20 internal port LED is active. For
supplier #2, D17 is active.
D13 BLUE D13 Two-pair port 3 power is ON. For J8 supplier #1 (see the BOM), J8 internal port LED is active. For
supplier #2, D13 is active.
D12 BLUE D12 Two-pair port 4 power is ON. For J7 supplier #1 (see the BOM), J7 internal port LED is active. For
supplier #2, D12 is active.
D18 BLUE D18 Four-pair port 1A power is ON. For J21 supplier #1 (see the BOM), J21 internal port LED is active. For
supplier #2, D18 is active.
D14 BLUE D14 Four-pair port 2A power is ON. For J9 supplier #1 (see the BOM), J9 internal port LED is active. For
supplier #2, D14 is active.
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3.3 EVM Test Points
Table 4 lists and describes the EVM test points.
Table 4. EVM Test Points
TP Color Label Description
Motherboard: TPS23861EVM-612
TP1 RED VPWR Used for VPWR
TP2 RED 3.3V Used for TPS23861 VDD
TP3 SMT GND VPWR ground
TP4 WHT SDA I2C Data from LaunchPad and USB-TO-GPIO
TP5 WHT SCL I2C Clock from LaunchPad and USB-TO-GPIO
TP6 WHT PSE_SDAO I2C data out from TPS23861
TP7 WHT PSE_SCL I2C clock to TPS23861
TP8 WHT PSE_SDAI I2C data in to TPS23861
TP9 BLK GND1 Ground from LaunchPad and USB-TO-GPIO
TP11 SMT TP11 Chassis ground test point
TP14 SMT GND VPWR ground test point
TP15 SMT GND VPWR ground test point
TP16 SMT GND VPWR ground test point
Daughterboard: TPS23861EVM-613
TP4 RED 2P4D Two-pair port 4 DRAIN
TP12 WHT 2P4G Two-pair port 4 GATE
TP5 WHT 4P1AG Four-pair port 1A GATE
TP6 RED 4P1AD Four-pair port 1A DRAIN
TP9 WHT 4P1BG Four-pair port 1B GATE
TP10 RED 4P1BD Four-pair port 1B DRAIN
TP1 BLK GND VPWR ground
TP8 SMT GND VPWR ground
3.4 EVM Test Jumpers
The EVM is equipped with shunts on the jumper positions identified in Table 5, in the Default Pin Position
column. Shunts can be moved and removed, as required, during use.
Table 5. EVM Jumpers(1)
Jumper Default Pin Label Description
Position
J27 1-2 P1 Two-pair port 1 LED bias
J28 1-2 P2 Two-pair port 2 LED bias
J16 1-2 P3 Two-pair port 3 LED bias
J15 1-2 P4 Two-pair port 4 LED bias
J26 1-2 P5 Four-pair port 1A LED bias
J25 1-2 P6 Four-pair port 1B LED bias
J14 1-2 P7 Four-pair port 2A LED bias
J13 1-2 P8 Four-pair port 2B LED bias
(1) Remove the jumpers listed in this table when doing SIFOS or UNH DC MPS testing.
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TPS23861EVM-612 PI Commander GUI Setup www.ti.com
4 TPS23861EVM-612 PI Commander GUI Setup
4.1 TPS23861EVM-612 GUI Installation
The Texas Instruments PI Commander graphical user interface (GUI) can be used with TPS23861EVM-
612 to provide real time feedback on port telemetry. PI Commander (PI Commander - TPS23861-
setup.exe) can be downloaded from the TPS23861 product page in the Software section.
Follow the onscreen instructions to complete the installation. PI Commander uses the USB-TO-GPIO as
an interface between the PC USB port and TPS23861EVM-612 J2 connector (I2C interface). Before
starting PI Commander, make sure the USB-TO-GPIO is properly connected to TPS23861EVM-612 as
shown in Figure 2.
4.2 TPS23861EVM-612 GUI Operation
Start Texas Instruments PI Commander - TPS23861 by clicking START →All Programs →Texas
Instruments →PI-Commander-n.n.n-n, then PI-Commander-PoE. A command window opens as the
program starts and scans for devices (note that the Scanning for devices …. message displays in the
window footer until the scan is complete). Once the scan is complete, click on the UNKNOWN 30 device
(Figure 4).
Figure 4. PI Commander Device Menu Window
TPS23861 shows up in the Device Selector window. Click the OK button.
Figure 5. PI Commander Device Selection Window
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