Texas Instruments TPS23882B1EVM User manual

User’s Guide
TPS23882B1EVM: PoE, PSE, TPS23882B1
Evaluation Module
ABSTRACT
This user’s guide describes the evaluation modules (EVM) for the TPS23882B1 (TPS23882B1EVM-008 and
BOOST-PSEMTHR8-097). The EVM contains evaluation and reference circuitry for the TPS23882B1. The
TPS23882B1 is a Power-over-Ethernet (PoE) device for power sourcing equipment (PSE).
Table of Contents
1 Description.............................................................................................................................................................................. 2
1.1 Features............................................................................................................................................................................. 2
1.2 Applications........................................................................................................................................................................2
2 Quick Start...............................................................................................................................................................................3
2.1 Input Power........................................................................................................................................................................ 3
2.2 PoE Port Interfaces............................................................................................................................................................ 3
2.3 I2C Interfaces..................................................................................................................................................................... 3
2.4 Basic Test Setup Using Autonomous Mode....................................................................................................................... 4
2.5 Basic Test Setup Using USB2ANY for I2C Interface (Auto Mode or Semi-Auto Mode Operation with I2C Monitoring)..... 5
2.6 Advanced Test Setup Using MSP-EX430FR5969 LaunchPad™ .......................................................................................6
3 General Use Features.............................................................................................................................................................7
3.1 EVM Input/Output Connectors and Switches.....................................................................................................................7
3.2 EVM LEDs..........................................................................................................................................................................7
3.3 EVM Test Points.................................................................................................................................................................8
3.4 EVM Test Jumpers............................................................................................................................................................. 9
4 TPS23882B1 GUI Setup........................................................................................................................................................10
4.1 TPS23882B1 GUI Installation.......................................................................................................................................... 10
4.2 TPS23882B1GUI Operation.............................................................................................................................................10
4.3 MSP-EXP430FR5969 Details.......................................................................................................................................... 14
4.4 MSP430 Reference Code................................................................................................................................................ 16
5 EVM Schematic, Layout Guidelines, PCB Assembly and Layer Plots............................................................................ 17
5.1 Schematic........................................................................................................................................................................ 18
5.2 Layout Guidelines............................................................................................................................................................ 21
5.3 PCB Drawings..................................................................................................................................................................21
6 Bill of Materials..................................................................................................................................................................... 26
Trademarks
LaunchPad™ and Code Composer Studio™ are trademarks of Texas Instruments.
All trademarks are the property of their respective owners.
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1 Description
The TPS23882B1 features the TPS23882B1: an 8-channel, IEEE802.3bt compliant PoE PSE controller. The
EVM consists of a motherboard (BOOST-PSEMTHR8-097) and a daughterboard (TPS23882B1EVM-008)
containing one TPS23882B1 device. The TPS23882B1 EVM provides a multi-port base platform interface for
TPS23882B1EVM-008, MSP-EXP430FR5969 (LaunchPad™), and USB2ANY (USB Interface Adapter).
1.1 Features
The EVM supports the following features:
• Eight IEEE802.3bt 2-pair ports with 1000BASE-T (gigabit Ethernet data pass-through)
• Single DC power supply input
• Onboard 3.3-V regulator
• Onboard I2C interface to the TPS23882B1 device from either USB2ANY or MSP-EXP430FR5969.
• Port ON status LEDs
• Reset button for easy reconfiguration
• User test points
1.2 Applications
The EVM is used in the following applications:
• Enterprise and SoHO switches and routers
• Connected ceiling LED switches
• PoE pass-through power modules
• Network video recorders (NVRs)
• Wireless backhaul and small-cell networking
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2 Quick Start
2.1 Input Power
2.1.1 Input Power (Labeled VPWR)
The DC input voltage is provided through J1 on the motherboard (screw jack). A DC power supply or wall
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, is used for port VBUS and for the TPS23882B1 devices. The
VPWR connections to the PoE ports are not fused. Each two-pair port is capable of furnishing at least 30 W.
The minimum PSE port voltage is 44 VDC for type 1 and 50 V for type 2 and type 3. During evaluation, choose
the appropriate DC power supply for different environments.
2.1.2 Local 3.3 V (Labeled 3.3 V)
Local 3.3 V for local devices (labeled as 3.3 V) is provided by the onboard LM5019 buck converter. The LM5019
provides a basic power-on sequence and provides a well-controlled and consistent start-up. In addition to 54 V,
the TPS23882B1 requires 3.3 V for the digital circuitry and this is routed up to TPS23882B1EVM-008 over the
connector interface. The current consumption is 6-mA typical and 12-mA maximum.
2.1.3 External 3.3 V (Labeled 3.3 V_USB)
The BOOST-PSEMTHR8-097 provides galvanic isolation between the PoE power side and host side using
digital isolators (ISO7241CD). The host side power is provided either from J2 of the mother board (from
USB2ANY) or J5 of the motherboard (from MSP-EXP430FR5969).
CAUTION
Do not use USB2ANY and LaunchPad simultaneously.
Table 2-1. TPS23882B1 Voltage Rail Current Requirements
Voltage Rail Typical (mA) Maximum (mA)
3.3 V_USB 2.5 3
3.3 V 6 12
VPWR (Miscellaneous) 35 57
VPWR (8 × 2 Pair Ports) 4800 5455
VPWR Total (8 × 2 Pair Ports) 4835 5512
2.2 PoE Port Interfaces
The TPS23882B1 device must be configured through the host to become operational if the device is
not configured to autonomous mode(described in section 2.4). This EVM provides 2 ways to control the
TPS23882B1: TPS238x EVM GUI (with USB2ANY) and Basic Reference Code (with MSP-EXP430FR5969
LaunchPad).
2.2.1 IEEE802.3bt 2-Pair Ports
Eight 2-pair ports are provided at J19, J20, J8, J7, J32, J33, J21, and J9 of the motherboard for 2-pair ports 1, 2,
3, 4, 5, 6, 7, and 8 respectively. The power furnished is according to alternative A with MDI-X polarity.
2.3 I2C Interfaces
Two I2C interfaces to the TPS23882B1 are provided on the EVM.
2.3.1 USB2ANY
J2 of the motherboard provides an interface with the USB2ANY adapter when using a PC and GUI.
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2.3.2 MSP-EXP430FR5969
J3, J4, and J5 of the motherboard provide an interface with the MSP-EXP430FR5969 when using a PC to
develop custom system software.
2.4 Basic Test Setup Using Autonomous Mode
The TPS23882B1 supports autonomous mode which means it can operate without any host control. During
power up the resistance on the AUTO pin is measured and the device is pre-configured according to the
jumper configuration on J5 of the daughterboard. All ports are configured with the same power level. Due to
the hardware configuration on the motherboard, all 2-pair ports are interoperable with PDs. Only 2P-15W and
2P-30W are valid selections on the TPS23882B1EVM-008 as the other resistors are not populated.
To test with autonomous mode, install a jumper on the pins of J5 corresponding to the desired power level and
power on the board without the USB2ANY or MSP-EXP430FR5969 connected. Figure 2-1 illustrates the basic
setup using autonomous mode.
TPS237 3-4EVM-758
Class 3-4
Power
Supply
J7
J1
32
J33
TPS238 82EVM-008
(+)
(±)
J8
J20
J19
D1
J2
BOOST-PSEMTHR-097
J21
J9
Positive Negative
Ethernet
Cable
Figure 2-1. Basic Setup Using Autonomous Mode
If the EVM is powered with a jumper on J5 of the daughterboard, the device will automatically enter autonomous
mode at the selected power level. If the selected power level changes, the EVM must be power cycled for the
change to take effect.
Table 2-2. AUTO Pin Programming
AUTO Pin Autonomous Mode
Configuration Resulting Register Configurations
Register 0x12h Register 0x14h Register 0x29h
Open/Floating Disabled 0x00h 0x00h 0x00h
124 kΩ 2-pair 15 W 0xFFh 0xFFh 0x00h
62 kΩ 2-pair 30 W 0xFFh 0xFFh 0x33h
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2.5 Basic Test Setup Using USB2ANY for I2C Interface (Auto Mode or Semi-Auto Mode
Operation with I2C Monitoring)
An I2C interface is provided through J2 of the motherboard to the TPS23882B1 device on the
TPS23882B1EVM-008. The USB2ANY adapter (not included) can be used with any TI GUI which uses
USB2ANY to read and write over an I2C bus. Figure 2-2 illustrates the basic setup using USB2ANY.
TPS237 3-4EVM-758
Class 3-4
Positive
Power
Supply
J7
J1
32
J33
TPS238 82EVM-008
(+)
(í)
J8
J20
J19
D1
J2
USB2ANY
BOOST-PSE MTHR-097
Ribbon
Cable
xxx
xxx
xx
xx
xx
xxx
xxx
xxx
xx
xx
xxx
xxx
PC USB CABLE
Etherne t
Cable
J21
J9
Negative
Figure 2-2. Basic Setup Using USB2ANY
CAUTION
If wanting to run TPS23882B1 in semi-auto mode, remove the jumper installed on J5 of the
TPS23882B1 daughterboard before powering on the board.
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2.6 Advanced Test Setup Using MSP-EX430FR5969 LaunchPad™
The LaunchPad (not included) running a custom software program can communicate with the TPS23882B1
devices on the TPS23882B1EVM-008. Figure 2-3 shows the advanced setup using LaunchPad.
TPS237 3-4EVM-758
Class 3-4
Power
Supply
J7
J1
J32 J33
TPS238 82EVM-008
(+)
J8
J20
J19
D1
J2
BOOST-PSE MTHR-097
xx
xx
x
x
x
xxx
xxx
xxx
xx
xx
xxx
xxx
xxx
PC
USB CABLE
MSP-
EXP430FR5969
J21
J9
(í)
Etherne t
Cable
Positive
Negative
Figure 2-3. Advanced Setup Using LaunchPad™
CAUTION
If wanting to run TPS23882B1 in semi-auto mode, remove the jumper installed on J5 of the
TPS23882B1 daughterboard before powering on the board.
CAUTION
Do not press the RESET button (S1) on the motherboard while communicating over I2C. Pressing
this button will set all ports to off mode and the reference code will not be able to recover.
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3 General Use Features
3.1 EVM Input/Output Connectors and Switches
Table 3-1 lists the EVM input and output connectors on the mother board.
Table 3-1. EVM Input/Output Connectors
Connector or
Switch Label Description
S1 RESET Button to send a hardware reset signal to the TPS23882B1
J1 J1 DC power supply screw jack. (44–57 VDC). Use a 48 VDC (nominal) for type 1 and 54 VDC (nominal) for
type 2, 3, and 4 PSE operation.
J2 J2 Ribbon cable connection to USB2ANY adapter
J3 J3 LaunchPad control (mates with LaunchPad J1)
J4 J4 LaunchPad I2C (mates with LaunchPad J2)
J5 J5 LaunchPad power (onboard, mates with LaunchPad J6)
J6 J6 TPS23882B1EVM-008 control (mates with TPS23882B1EVM-008 J3)
J17 J17 TPS23882B1EVM-008 Channel 5–8 (mates with TPS23882B1EVM-008 J2)
J18 J18 TPS23882B1EVM-008 Channel 1–4 (mates with TPS23882B1EVM-008 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
J31 J31 Two-pair port 5 data only
J32 2 Pair Port 5 Two-pair port 5 power and data
J30 J30 Two-pair port 6 data only
J33 2 Pair Port 6 Two-pair port 6 power and data
J24 J24 Two-pair port 7 data only
J21 2 Pair Port 7 Two-pair port 7 power and data
J12 J12 Two-pair port 8 data only
J9 2 Pair Port 8 Two-pair port 8 power and data
J29 J29 Chassis ground tie point
3.2 EVM LEDs
Table 3-2 lists the motherboard LEDs and their descriptions.
Table 3-2. EVM LEDs
LED Color Label Description
D1 GREEN 48 V 48-V ON indicator
D13 BLUE D13 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, D13 is active.
D15 BLUE D15 Two-pair port 2 power is ON. For J20 supplier #1 (see the BOM), J20 internal port LED is active. For
supplier #2, D15 is active.
D14 BLUE D14 Two-pair port 3 power is ON. For J8 supplier #1 (see the BOM), J8 internal port LED is active. For supplier
#2, D14 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.
D19 BLUE D19 Two-pair port 5 power is ON. For J32 supplier #1 (see the BOM), J32internal port LED is active. For
supplier #2, D19 is active.
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Table 3-2. EVM LEDs (continued)
LED Color Label Description
D18 BLUE D18 Two-pair port 6 power is ON. For J33 supplier #1 (see the BOM), J33 internal port LED is active. For
supplier #2, D18 is active.
D17 BLUE D17 Two-pair port 7 power is ON. For J21 supplier #1 (see the BOM), J21 internal port LED is active. For
supplier #2, D17 is active.
D16 BLUE D16 Two-pair port 8 power is ON. For J9 supplier #1 (see the BOM), J9 internal port LED is active. For supplier
#2, D16 is active.
D3 GREEN D3 Debug LED
3.3 EVM Test Points
Table 3-3 lists and describes the EVM test points.
Table 3-3. EVM Test Points
TP Color Label Description
Motherboard: BOOST-PSEMTHR8-097
TP1 RED VPWR Used for VPWR
TP2 RED 3.3 V Used for TPS23882B1 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 TPS23882B1
TP7 WHT PSE_SCL I2C clock to TPS23882B1
TP8 WHT PSE_SDAI I2C data in to TPS23882B1
TP9 BLK GND1 Ground from LaunchPad and USB2ANY
TP10 SMT GND VPWR ground test point
TP11 SMT TP11 VPWR ground test point
TP12 SMT GND VPWR ground test point
TP13 SMT GND VPWR ground test point
Daughterboard: TPS23882B1EVM-008
TP2 RED 2P4D Two-pair port 4 DRAIN
TP3 WHT 2P4G Two-pair port 4 GATE
TP4 WHT 2P5G Two-pair port 5 GATE
TP5 RED 2P5D Two-pair port 5 DRAIN
TP7 WHT 2P6G Two-pair port 6 GATE
TP6 RED 2P6D Two-pair port 6 DRAIN
TP1 BLK GND VPWR ground
TP8 SMT GND VPWR ground
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3.4 EVM Test Jumpers
The EVM is equipped with shunts on the jumper positions identified in Table 3-4, in the Default Pin Position
column. Shunts can be moved and removed, as required, during use.
Table 3-4. EVM Jumpers
Jumper Default Pin
Position Label Description
Motherboard: BOOST-PSEMTHR8-097
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 Two-pair port 5 LED bias
J25 1-2 P6 Two-pair port 6 LED bias
J14 1-2 P7 Two-pair port 7 LED bias
J13 1-2 P8 Two-pair port 8 LED bias
Daughterboard: TPS23882B1EVM-008
J4 1-2;3-4;5-6;7-8 A1;A2;A3;A
4
I2C A1-A4 address lines
J5 3-4 2P-30 W AUTO pin selection (autonomous mode is enabled if
connecting auto pin to ground with selected resistance, 2-pair
30-W operation is selected by default)
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4 TPS23882B1 GUI Setup
4.1 TPS23882B1 GUI Installation
TI's TPS23882B1 GUI is used with the TPS23882B1 to control the port and provide real-time feedback on port
telemetry. Download the TPS23882B1 GUI from the TPS23882B1 product folder page in the Tools and software
section.
Follow the onscreen instructions to complete the installation. The TPS23882B1 GUI uses the USB2ANY as
an interface between the PC USB port and the BOOST-PSEMTHR8-097 J2 connector (I2C interface). Before
starting the TPS23882B1 GUI, make sure the USB2ANY is properly connected to TPS23882B1 and the EVM is
supplied with a 44- to 57-V power supply as shown in Figure 2-2.
4.2 TPS23882B1GUI Operation
Start the TPS23882B1 GUI by double clicking the GUI icon. A window similar to Figure 4-1 will come up.
Figure 4-1. TPS23882B1 GUI Startup Window
The default device address in the GUI is set to 0x20 which matches the default configuration of the EVM (J4 on
the daughter card is installed with jumpers). The GUI sets the TPS23882B1 in configuration B mode (see the
GENERAL MASK Register section of the data sheet for details). The address can be programed through the
A1 to A4 pins and the I2C address setting in the GUI needs to match the hardware configuration. See the Pin
Status Register section of the data sheet for details. The startup page contains links to the EVM user's guide,
TPS23882B1 data sheet, E2E forum and MSP430 reference code. Four popular PD end-equipment images are
connected to the PSE switch. Links to the recommended PD device for each end equipment are also provided.
Once the TPS23882B1 device is connected, click Firmware to select firmware to be loaded to TPS23882B1.
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