Texas Instruments TPS23882B1EVM Bedienungsanleitung

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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TPS23882B1EVM: PoE, PSE, TPS23882B1

Evaluation Module

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

J33

TPS238 82EVM-008

(+)

(±)

J20

J19

BOOST-PSEMTHR-097

J21

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

Open/Floating Disabled 0x00h 0x00h 0x00h

124 kΩ 2-pair 15 W 0xFFh 0xFFh 0x00h

62 kΩ 2-pair 30 W 0xFFh 0xFFh 0x33h

Quick Start www.ti.com

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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

J33

TPS238 82EVM-008

(+)

(í)

J20

J19

USB2ANY

BOOST-PSE MTHR-097

Ribbon

Cable

xxx

PC USB CABLE

Etherne t

Cable

J21

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

J32

J33

TPS238 82EVM-008

(+)

J20

J19

BOOST-PSE MTHR-097

xxx

USB CABLE

MSP-

EXP430FR5969

J21

(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.

Quick Start www.ti.com

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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

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.

TPS23882B1 GUI Setup www.ti.com

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