Texas Instruments TPS2388EVM-612 User Manual

User's Guide

SLUUBQ7–August 2017

TPS2388EVM-612: PoE PSE Evaluation Module for

TPS2388

This user’s guide describes the TPS2388 evaluation module (TPS2388EVM-612 or EVM). The EVM contains evaluation and reference circuitry for the TPS2388. The TPS2388 is a Power-over-Ethernet (PoE) device for power sourcing equipment (PSE).

Contents

1 Description.................................................................................................................... 2

2 Quick Start.................................................................................................................... 2

3 General Use Features....................................................................................................... 6

4 TPS2388EVM-612 Host Setup............................................................................................. 8

5 EVM Schematic, Layout Guidelines and PCB Assembly, Layer Plots .............................................. 12

6 Bill of Materials ............................................................................................................. 21

List of Figures

1 Basic Setup Using USB2ANY ............................................................................................. 4

2 Advanced Setup Using LaunchPad™ .................................................................................... 5

3 Hit 'S' to Start................................................................................................................. 9

4 Program Started ............................................................................................................. 9

5 Terminal Response With Connected Ports ............................................................................. 10

6 Semi-Auto Mode Reference Code Structure .......................................................................... 11

7 Virtual Auto Mode Reference Code Structure ......................................................................... 12

8 TPS2388EVM-612 (Motherboard) Schematic: Control................................................................ 13

9 TPS2388EVM-612 (Motherboard) Schematic: Power Ports.......................................................... 14

10 TPS2388EVM-016 (Daughterboard) Schematic ....................................................................... 15

11 TPS2388EVM-612 (Motherboard) Top Side Assembly ............................................................... 16

12 TPS2388EVM-612 (Motherboard) Top Side Routing.................................................................. 17

13 TPS2388EVM-612 (Motherboard) Layer 2 Routing ................................................................... 17

14 TPS2388EVM-612 (Motherboard) Layer 3 Routing ................................................................... 18

15 TPS2388EVM-612 (Motherboard) Bottom Side Routing.............................................................. 18

16 TPS2388EVM-016 (Daughterboard) Top Side Assembly ............................................................ 19

17 TPS2388EVM-016 (Daughterboard) Top Side Routing............................................................... 19

18 TPS2388EVM-016 (Daughterboard) Bottom Side Routing ........................................................... 20

19 TPS2388EVM-016 (Daughterboard) Bottom Side Assembly......................................................... 20

1 TPS2388EVM-612 Voltage Rail Current Requirements ............................................................... 3

2 EVM Input/Output Connectors ............................................................................................. 6

3 EVM LEDs .................................................................................................................... 6

4 EVM Test Points............................................................................................................. 7

5 EVM Jumpers ............................................................................................................... 7

6 TPS2388EVM-612 Bill of Materials ..................................................................................... 21

7 TPS2388EVM-016 Bill of Materials ...................................................................................... 23

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List of Tables

TPS2388EVM-612: PoE PSE Evaluation Module for TPS2388

Description

Trademarks

LaunchPad, Code Composer Studio are trademarks of Texas Instruments. All other trademarks are the property of their respective owners.

1 Description

The TPS2388EVM-612 features the octal channel, TPS2388, IEEE 802.3at PoE PSE controller. The EVM consists of a motherboard (TPS2388EVM-612) and daughter board (TPS2388EVM-016) containing one TPS2388 device. The TPS2388EVM-612 provides a multi-port base platform interface for TPS2388EVM016, MSP-EXP430G2 (LaunchPad™), and USB2ANY (USB Interface Adapter).

1.1 Features

• Eight 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)

• 100% passed Sifos compliance test

• Single DC power supply input

• On board 3.3-V regulator

• On board I2C interface to both TPS2388PW devices from either USB2ANY or MSP-EXP430G2.

• Port ON status LEDs

• User test points

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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 with sufficient current capacity can power the EVM.

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 TPS2388 device. 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 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.

CAUTION

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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 onboard LM5019 buck converter. The LM5019 provides a basic power-on sequence and provides a well-controlled and consistent startup. In addition to 48 V, the TPS2388 requires 3.3 V for the digital circuitry and this is routed up to TPS2388EVM016 over the connector interface.

2.1.3 External 3.3 V (Labeled 3.3V_USB)

The TPS2388EVM-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 USB2ANY) or J5 (from LaunchPad). The current consumption is 6-mA typical, and 12-mA maximum.

Do not use USB2ANY and LaunchPad simultaneously.

Table 1. TPS2388EVM-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 Output Ports) 2992 3142 VPWR (8x Type 2 Output Ports) 5160 5418

VPWR Total (8x Type 1 Ports) 3027 3202 VPWR Total (8x Type 2 Ports) 5195 5478

Quick Start

CAUTION

2.2 PoE Port Interfaces

Configure the TPS2388 device with the host in order to get operational. Control the TPS2388 device through the GUI or an external MCU. The host must configure the TPS2388 and send power on command after a valid PD is connected to the port.

2.2.1 Standard 30 W, IEEE802.3 at 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, four-pair ports (J21 and J9) are provided. J21 is four pair port 1 and J9 is four pair port

2. The power furnished is according to alternative A with MDI-X polarity and alternative B on a single port connector. A PD which can process power on all of the Ethernet conductors (refer to Dual TPS2378 PD

for 51-W High-Power Four-Pair PoE ) can power on and consume up to 60 W. A single PD can be

powered as well with proper operations (the Semi-Auto Mode reference code has the capability to power on both single PD and dual PD). The Virtual Auto Mode reference code disables these high power ports completely, since it is intended for use on IEEE802.3at compliant (2-pair) ports only.

2.3 I2C Interfaces

The EVM provides two I2C interfaces to the TPS2388.

2.3.1 USB2ANY

J2 provides an interface with the USB2ANY adapter when using a PC and GUI.

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TPS2388EVM-612: PoE PSE Evaluation Module for TPS2388

TPS23754EVM-420

Power

Supply

J21

TPS2388EVM-016

(+)

(-)

J20

J19

USB2ANY

TPS2388EVM-612

USB CABLE

Positive Negative

Ribbon

Cable

Ethernet

Cable

Quick Start

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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 Using USB2ANY for I2C Interface (Semi-Auto Mode Operation With I2C Monitoring)

An I2C interface is provided through J2 to the TPS2388PW devices on the TPS2388EVM-016. The USB2ANY adapter (not included) can be used with any TI GUI which uses USB2ANY to read and write over an I2C bus.

Figure 1. Basic Setup Using USB2ANY

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TPS23754EVM-420

Power

Supply

J21

TPS2388EVM-016

(+)

(-)

J20

J19

TPS2388EVM-612

USB CABLE

MSP-EXP430G2

Positive Negative

Ethernet

Cable

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2.5 Advanced Test Setup Using MSP-EX430G2 (LaunchPad™)

The LaunchPad (not included) running a custom software program can communicate with the TPS2388 device on the TPS2388EVM-016 . Figure 2 shows the advanced setup using LaunchPad.

Quick Start

Figure 2. Advanced Setup Using LaunchPad™

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TPS2388EVM-612: PoE PSE Evaluation Module for TPS2388

General Use Features

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

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Connector or

Switch

J1 J1 DC power supply screw jack. (44–57 VDC, 5 A). Use a 48 VDC (nominal) for type 1 and 54

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 (mates with LaunchPad J6)

J6 J6 TPS2388EVM-016 control (mates with TPS2388EVM-016 J3) J17 J17 TPS2388EVM-016 port 5-8 (mates with TPS2388EVM-016 J2) J18 J18 TPS2388EVM-016 port 1-4 (mates with TPS2388EVM-016 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

Label Description

VDC (nominal) for type 2 PSE operation.

3.2 EVM LEDs

Table 3 lists the EVM LEDs and their descriptions.

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

D17 BLUE D17 Two-pair port 2 power is ON. For J20 supplier #1 (see the BOM), J20 internal port LED is active. For

D13 BLUE D13 Two-pair port 3 power is ON. For J8 supplier #1 (see the BOM), J8 internal port LED is active. For

D12 BLUE D12 Two-pair port 4 power is ON. For J7 supplier #1 (see the BOM), J7 internal port LED is active. For

D18 BLUE D18 Four-pair port 1A power is ON. For J21 supplier #1 (see the BOM), J21 internal port LED is active. For

D14 BLUE D14 Four-pair port 2A power is ON. For J9 supplier #1 (see the BOM), J9 internal port LED is active. For

TPS2388EVM-612: PoE PSE Evaluation Module for TPS2388

Table 3. EVM LEDs

is active. For supplier #2, D16 is active.

supplier #2, D17 is active.

supplier #2, D13 is active.

supplier #2, D12 is active.

supplier #2, D18 is active.

supplier #2, D14 is active.

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3.3 EVM Test Points

Table 4 lists and describes the EVM test points.

TP Color Label Description

Motherboard: TPS2388EVM-612

TP1 RED VPWR Used for VPWR TP2 RED 3.3V Used for TPS2388 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 TPS2388 TP7 WHT PSE_SCL I2C clock to TPS2388 TP8 WHT PSE_SDAI I2C data in to TPS2388

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: TPS2388EVM-016

TP2 RED 2P4D Two-pair port 4 DRAIN

TP3 WHT 2P4G Two-pair port 4 GATE

TP4 WHT 4P1AG Four-pair port 1A GATE

TP5 RED 4P1AD Four-pair port 1A DRAIN

TP6 RED 4P1BD Four-pair port 1B DRAIN

TP7 WHT 4P1BG Four-pair port 1B GATE

TP1 BLK GND VPWR ground

TP8 SMT GND VPWR ground

General Use Features

Table 4. EVM Test Points

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.

Jumper Default Pin

Motherboard: TPS2388EVM-612

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

Daughterboard: TPS2388EVM-016

J4 1-2;3-4;5-6;7-8 NA I2C A1-A4 address lines

(1)

Remove the jumpers on the mother board when doing SIFOS or UNH DC MPS testing.

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Table 5. EVM Jumpers

Label Description

Position

TPS2388EVM-612: PoE PSE Evaluation Module for TPS2388

(1)

TPS2388EVM-612 Host Setup

4 TPS2388EVM-612 Host Setup

4.1 MSP-EXP430G2 Setup

The TPS2388EVM-612 accepts the MSP-EXP430G2 evaluation module when the application requires management of the TPS2388 devices with an external controller. Before inserting the MSP-EXP430G2 into the TPS2388EVM-612, make the following jumper changes and ensure that the target MSP430 (MSP430G2553) device is installed:

1. Remove the shunt on J5 in the P1.6 slot

2. Remove the shunts on J3 in the RXD and TXD slot. Re-install these in the vertical position as described in MSP-EXP430G2 LaunchPad Development Kit

3. Install MSP-EXP430G2 onto TPS2388EVM-612 and ensure that the USB2ANY ribbon cable is not installed into J2

4. Connect the PC to the LaunchPad as shown in Figure 2

5. The source code was developed for the MSP430 LaunchPad Development Kit (MSP-EXP430G2

http://www.ti.com/tool/msp-exp430g2) using the Code Composer Studio™ (CCS) version 7.1.0

(http://www.ti.com/tool/ccstudio-msp430) development environment. The target MSP430 can be programmed within this environment. The reference code can be downloaded from the TPS2388 product folder on TI.com .

6. Once CCS is installed, use the basic set of instructions listed in Section 4.1.1 to import, build, and run the project. CCS version 7.1.0 is used in the following examples. Note that a terminal program such as HyperTerminal or Teraterm is required to view the output from the EVM when it is running.

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4.1.1 Basic CCS and Terminal Setup

1. Launch the CCS program on the PC: Start → Texas Instruments → Code Composer Studio 7.1.0 → Code Composer Studio 7.1.0

2. OK the workspace location and CCS starts

3. Import the project: File → Import Existing CCS Eclipse Project

4. Navigate to the project location, then click the Finish button

5. Set the active project: Project, Build Configurations, Set Active, Virtual-Auto, or Semi-Auto

6. Build the project by clicking the hammer symbol

7. Launch debug session from CCS to activate the current project: Run, Debug (or F11).

8. Run the active project: Run, Resume (or play button, F8)

9. Determine the PC COM port connected to the LaunchPad by going into the Device Manager Ports (COM and LPT) section. Launch the terminal program.

10. Once the terminal program is properly connected to the LaunchPad running the POE firmware, then text similar to Figure 3 appears (If it does not appear at first, try to close Tera Term and reopen).

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11. Pressing the “S” key on the keyboard starts the program

TPS2388EVM-612 Host Setup

Figure 3. Hit 'S' to Start

12. The TPS2388EVM-612 is now waiting for a PD load to be installed. As ports are installed, the firmware automatically detects, classifies, and powers up the port as shown in Figure 5. Port status is updated on the screen approximately every 10 seconds.

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Figure 4. Program Started

TPS2388EVM-612: PoE PSE Evaluation Module for TPS2388

+ 20 hidden pages

Texas Instruments TPS2388EVM-612 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

TPS2388EVM-612: PoE PSE Evaluation Module for TPS2388

1 Description

1.1 Features

1.2 Applications

2 Quick Start

2.1 Input Power

2.1.1 Input Power (Labeled VPWR)

2.1.2 Local 3.3 V (Labeled 3.3V)

2.1.3 External 3.3 V (Labeled 3.3V_USB)

2.2 PoE Port Interfaces

2.2.1 Standard 30 W, IEEE802.3 at Type 2 Ports

2.2.2 Nonstandard 60-W Ports

2.3 I2C Interfaces

2.3.1 USB2ANY

2.3.2 MSP-EXP430G2

2.4 Basic Test Setup Using USB2ANY for I2C Interface (Semi-Auto Mode Operation With I2C Monitoring)

3 General Use Features

3.1 EVM Input/Output Connectors and Switches

3.2 EVM LEDs

3.3 EVM Test Points

3.4 EVM Test Jumpers

4 TPS2388EVM-612 Host Setup

4.1 MSP-EXP430G2 Setup

4.1.1 Basic CCS and Terminal Setup