Texas Instruments TPS211 AEVM Series User manual

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   

April 2004

User’s Guide

SBVU007

IMPORTANT NOTICE

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EVM IMPORTANT NOTICE

Texas Instruments (TI) provides the enclosed product(s) under the following conditions:

This evaluation kit being sold by TI is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION

PURPOSES ONLY and is not considered by TI to be fit for commercial use. As such, the goods being provided

may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective

considerations, including product safety measures typically found in the end product incorporating the goods.

As a prototype, this product does not fall within the scope of the European Union directive on electromagnetic

compatibility and therefore may not meet the technical requirements of the directive.

Should this evaluation kit not meet the specifications indicated in the EVM User’s Guide, the kit may be returned

within 30 days from the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE

WARRANTY MADE BY SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED,

IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY

PARTICULAR PURPOSE.

The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user

indemnifies TI from all claims arising from the handling or use of the goods. Please be aware that the products

received may not be regulatory compliant or agency certified (FCC, UL, CE, etc.). Due to the open construction

of the product, it is the user’s responsibility to take any and all appropriate precautions with regard to electrostatic

discharge.

EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE, NEITHER PARTY SHALL BE LIABLE

TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.

TI currently deals with a variety of customers for products, and therefore our arrangement with the user is not

exclusive.

TI assumes no liability for applications assistance, customer product design, software performance, or

infringement of patents or services described herein.

Please read the EVM User’s Guide and, specifically, the EVM Warnings and Restrictions notice in the EVM

User’s Guide prior to handling the product. This notice contains important safety information about temperatures

and voltages. For further safety concerns, please contact the TI application engineer.

Persons handling the product must have electronics training and observe good laboratory practice standards.

No license is granted under any patent right or other intellectual property right of TI covering or relating to any

machine, process, or combination in which such TI products or services might be or are used.

Mailing Address:

Texas Instruments

Post Office Box 655303

Dallas, Texas 75265

EVM WARNINGS AND RESTRICTIONS

It is important to operate this EVM within the input voltage range of 2.8 V and 5.5 V, and the

output voltage range of 2.8 V and 5.5 V.

Exceeding the specified input range may cause unexpected operation and/or irreversible

damage to the EVM. If there are questions concerning the input range, please contact a TI

field representative prior to connecting the input power.

Applying loads outside of the specified output range may result in unintended operation and/or

possible permanent damage to the EVM. Please consult the EVM User’s Guide prior to

connecting any load to the EVM output. If there is uncertainty as to the load specification,

please contact a TI field representative.

During normal operation, some circuit components may have case temperatures greater than

60°C. The EVM is designed to operate properly with certain components above 60°C as long

as the input and output ranges are maintained. These components include but are not limited

to linear regulators, switching transistors, pass transistors, and current sense resistors. These

types of devices can be identified using the EVM schematic located in the EVM User’s Guide.

When placing measurement probes near these devices during operation, please be aware

that these devices may be very warm to the touch.

Mailing Address:

Texas Instruments

Post Office Box 655303

Dallas, Texas 75265

Trademarks

Preface

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About This Manual

This user’s guide describes the TPS211xA evaluation module (EVM). This

guide contains the EVM schematic, bill of materials, assembly drawing, and

top and bottom layer printed circuit board layouts.

How to Use This Manual

This document contains the following chapters:

-Chapter 1 − Introduction

-Chapter 2 − EVM Setup

-Chapter 3 − Schematic and Bill of Materials

-Chapter 4 − Board Layout

The information in a caution or a warning is provided for your protection.

Please read each caution and warning carefully.

Related Documentation From Texas Instruments

Data Sheet: Literature Number:

TPS2110/1A: Autoswitching Power Mux SBVS043

TPS2112/3A: Autoswitching Power Mux SBVS045

TPS2114/5A: Autoswitching Power Mux SBVS044

Trademarks

All trademarks are the property of their respective owners.

Trademarks

Electrostatic Sensitive Devices

This EVM contains components that can potentially be damaged by

electrostatic discharge. Always transport and store the EVM in its

supplied ESD bag when not in use. Handle using an antistatic

wristband. Operate on an antistatic work surface. For more

information on proper handling, refer to SSYA008.

Contents

vii

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1 Introduction 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 EVM Setup 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.1 Setting Up the EVM 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2 Current-Limit Adjustment 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.3 Manual Switching Mode (TPS2110/1/4/5A Only) 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.3.1 Configuring the TPS2110/1A for Manual Switching 2-3. . . . . . . . . . . . . . . . . . . . . . .

2.3.2 Configuring the TPS2114/5A for Manual Switching 2-3. . . . . . . . . . . . . . . . . . . . . . .

2.4 Automatic Switching Modes 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.4.1 Mode 1 Automatic Switching 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.4.2 Mode 2 Automatic Switching (TPS2110/1/2/3A Only) 2-4. . . . . . . . . . . . . . . . . . . . .

2.5 Output Voltage Holdup 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.6 Switch Status (TPS2112/3/4/5A Only) 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3 Schematic and Bill of Materials 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.1 EVM Configurations 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.2 Schematic 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.3 Bill of Materials 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4 Board Layout 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.1 Layout Considerations 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Contents

viii

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2−1 Basic EVM Setup 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3−1 TPS211xAEVM Schematic 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4−1 Component Placement 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4−2 Top-Side Layout 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4−3 Bottom-Side Layout 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .



2−1 EVM Shorting Jumper Placement for Mode 1 Automatic Switching 2-3. . . . . . . . . . . . . . . . . .

2−2 EVM Shorting Jumper Placement for Mode 2 Automatic Switching 2-4. . . . . . . . . . . . . . . . . .

3−1 Available EVM Configurations 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3−2 HPA061 Bill of Materials 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1

Introduction

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The TPS211xA EVM is an evaluation module for the Texas Instruments

TPS211xA family of two-input, one-output power multiplexers. These

multiplexers enable seamless transition between two power supplies, each

operating at 2.8 V–5.5 V and delivering up to 1 A. EVM configurations are

available for the TPS2110A through TPS2115A. Refer to Table 3−1, the

schematic, and the bill of materials in this user’s guide to distinguish between

these configurations.

The EVM has test points for convenient access to all critical node voltages,

potentiometers for adjusting the current limit and the auto-switching voltage

sense thresholds, headers for selecting the manual/auto-switching operating

modes, and headers for selecting the output hold-up capacitance.

Chapter 1

1-2

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