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User's Guide

SLVU682 – March 2012

TPS2378 EVM User’s Guide

This User’s Guide describes the evaluation module (EVM) for the TPS2378 (TPS2378EVM-105).
TPS2378 is an IEEE802.3at type 2 compliant powered device (PD) controller.

Contents

1

Introduction

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2

1.1

Features

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2

1.2

Applications

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2

2

Electrical Specifications at 25°C

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2

3

Description

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3

4

Schematic

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4

5

General Configuration and Description

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5

5.1

Physical Access

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5

5.2

Test Setup

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5

6

EVM Assembly Drawings and Layout Guidelines

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6

6.1

PC Drawings

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6

6.2

Layout Guidelines

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9

6.3

EMI Containment

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9

7

Bill of Materials

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10

List of Figures

1

TPS2378EVM Schematic

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4

2

Typical TPS2378EVM Test Setup

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6

3

Top Side Placement

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6

4

Top Side Routing

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7

5

Layer Two Routing

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7

6

Layer Three Routing

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8

7

Bottom Side Routing

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8

8

Bottom Side Placement

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9

List of Tables

1

TPS2378EVM Electrical and Performance Specifications

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2

2

Connector Functionality

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5

3

Test Points

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5

4

Jumpers

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5

5

TPS2378EVM Bill of Materials

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10

1

SLVU682 – March 2012

TPS2378 EVM User’s Guide

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Copyright © 2012, Texas Instruments Incorporated

Summary of Contents for TPS2378

Page 1: ...Assembly Drawings and Layout Guidelines 6 6 1 PC Drawings 6 6 2 Layout Guidelines 9 6 3 EMI Containment 9 7 Bill of Materials 10 List of Figures 1 TPS2378EVM Schematic 4 2 Typical TPS2378EVM Test Set...

Page 2: ...IEEE 802 3at compliant devices Video and VoIP telephones Multiband access points Security cameras Pico base stations 2 Electrical Specifications at 25 C Table 1 TPS2378EVM Electrical and Performance...

Page 3: ...PD controller The TPS2378 RTN pin provides inrush limited turn on and charge of the bulk capacitor C4 During inrush the TPS2378 CDB pin is pulled low with respect to the RTN pin Since the CDB pin is c...

Page 4: ...C6 0 01uF R12 75 C7 0 01uF R13 75 C8 0 01uF D10 B2100 D5 B2100 D11 B2100 D6 B2100 D12 B2100 D7 B2100 D13 B2100 FB4 500 C4 47uF R6 12 1k 1 2 J4 D2 LN1271RAL D3 LN1371G R8 12 1k FB1 500 D1 B2100 C1 1000...

Page 5: ...D2 RED T2P voltage source above 38V is present at J3 D3 GREEN ON TPS2378 Output Powered Table 3 Test Points Test Point Color Label Description TP1 WHT APD Auxiliar power detect TP2 RED PAIR12 Data pa...

Page 6: ...es www ti com Figure 2 Typical TPS2378EVM Test Setup 6 EVM Assembly Drawings and Layout Guidelines 6 1 PC Drawings The following figures show component placement and layout of the EVM Figure 3 Top Sid...

Page 7: ...Assembly Drawings and Layout Guidelines Figure 4 Top Side Routing Figure 5 Layer Two Routing 7 SLVU682 March 2012 TPS2378 EVM User s Guide Submit Documentation Feedback Copyright 2012 Texas Instrument...

Page 8: ...ings and Layout Guidelines www ti com Figure 6 Layer Three Routing Figure 7 Bottom Side Routing 8 TPS2378 EVM User s Guide SLVU682 March 2012 Submit Documentation Feedback Copyright 2012 Texas Instrum...

Page 9: ...the power path 6 3 EMI Containment Use compact loops for dv dt and di dt circuit paths power loops and gate drives Use minimal yet thermally adequate copper areas for heat sinking of components tied t...

Page 10: ...pacing 0 100 inch x 2 PEC02SAAN Sullins 1 R14 100k Resistor Chip 1 16W 1 603 STD STD 1 R7 10k Resistor Chip 1 16W 1 603 STD STD 1 R4 237k Resistor Chip 1 16W 1 603 STD STD 1 R9 24 9k Resistor Chip 1 1...

Page 11: ...ncy energy and has not been tested for compliance with the limits of computing devices pursuant to part 15 of FCC or ICES 003 rules which are designed to provide reasonable protection against radio fr...

Page 12: ...na type and its gain should be so chosen that the equivalent isotropically radiated power e i r p is not more than that necessary for successful communication This radio transmitter has been approved...

Page 13: ...oduct only after you obtained the license of Test Radio Station as provided in Radio Law of Japan with respect to this product or 3 Use of this product only after you obtained the Technical Regulation...

Page 14: ...property damage personal injury or death If there are questions concerning these ratings please contact a TI field representative prior to connecting interface electronics including input power and in...

Page 15: ...ncy energy and has not been tested for compliance with the limits of computing devices pursuant to part 15 of FCC or ICES 003 rules which are designed to provide reasonable protection against radio fr...

Page 16: ...na type and its gain should be so chosen that the equivalent isotropically radiated power e i r p is not more than that necessary for successful communication This radio transmitter has been approved...

Page 17: ...roduct only after you obtained the license of Test Radio Station as provided in Radio Law of Japan with respect to this product or 3 Use of this product only after you obtained the Technical Regulatio...

Page 18: ...property damage personal injury or death If there are questions concerning these ratings please contact a TI field representative prior to connecting interface electronics including input power and in...

Page 19: ...egulatory and safety related requirements concerning its products and any use of TI components in its applications notwithstanding any applications related information or support that may be provided...

Page 20: ...Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery Lifecycle Information Texas Instruments TPS2378EVM 105...

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