Texas Instruments TPA301 Manuale utente

2001 Mixed-Signal Products

TPA301

Audio Power Amplifier

Evaluation Module

User’s Guide

SLOU014A

IMPORTANT NOTICE

TexasInstrumentsanditssubsidiaries(TI)reservetherighttomakechangestotheirproductsortodiscontinue

any product or service without notice, and advise customers to obtain the latest version of relevant information

to verify, before placing orders, that information being relied on is current and complete. All products are sold

subject to the terms and conditions of sale supplied at the time of order acknowledgment, including those

pertaining to warranty, patent infringement, and limitation of liability.

TI warrants performance of its products to the specifications applicable at the time of sale in accordance with

TI’sstandardwarranty.TestingandotherqualitycontroltechniquesareutilizedtotheextentTIdeemsnecessary

to support this warranty. Specific testing of all parameters of each device is not necessarily performed, except

those mandated by government requirements.

Customers are responsible for their applications using TI components.

In order to minimize risks associated with the customer’s applications, adequate design and operating

safeguards must be provided by the customer to minimize inherent or procedural hazards.

TIassumesnoliabilityforapplicationsassistance or customer product design. TI does not warrantorrepresent

thatanylicense,eitherexpressorimplied,isgrantedunderanypatentright,copyright,maskworkright,orother

intellectual property right of TI covering or relating to any combination, machine, or process in which such

products or services might be or are used. TI’s publication of information regarding any third party’s products

or services does not constitute TI’s approval, license, warranty or endorsement thereof.

Reproduction of information in TI data books or data sheets is permissible only if reproduction is without

alterationandisaccompaniedbyallassociatedwarranties,conditions,limitationsandnotices. Representation

or reproduction of this information with alteration voids all warranties provided for an associated TI product or

service, is an unfair and deceptive business practice, and TI is not responsible nor liable for any such use.

Resale of TI’s products or services with statements different from or beyond the parameters stated by TI for

that product or service voids all express and any implied warranties for the associated TI product or service,

is an unfair and deceptive business practice, and TI is not responsible nor liable for any such use.

Also see: Standard Terms and Conditions of Sale for Semiconductor Products. www.ti.com/sc/docs/stdterms.htm

Mailing Address:

Texas Instruments

Post Office Box 655303

Dallas, Texas 75265

iii

Chapter Title—Attribute Reference

Preface

Related Documentation From Texas Instruments

TI Plug-N-Play Audio Amplifier Evaluation Platform (literature

number SLOU011) provides detailed information on the evaluation

platform and its use with TI audio evaluation modules.

TPA301 350-mW Low-Voltage Audio Power Amplifier (literature

number SLOS208) This is the data sheet for the TPA301 audio

amplifier integrated circuit.

FCC Warning

This equipment is intended for use in a laboratory test environment only. It

generates, uses, and can radiate radio frequency energy and has not been

testedfor compliance with thelimitsof computing devices pursuanttosubpart

Jofpart 15of FCCrules, whicharedesignedtoprovidereasonableprotection

against radio frequency interference. Operation of this equipment in other

environments may cause interference with radio communications, in which

case the user at his own expense will be required to take whatever measures

may be required to correct this interference.

Trademarks

TI is a trademark of Texas Instruments Incorporated.

Running Title—Attribute Reference

Chapter Title—Attribute Reference

Contents

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

1.1 Feature Highlights 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.2 Description 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.3 TPA301 EVM Specifications 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 Quick Start 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.1 Precautions 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2 Quick Start List for Platform 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.3 Quick Start List for Stand-Alone 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3 Details 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.1 Precautions 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.2 The TPA301 Audio Amplifier Evaluation Module 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.2.1 TPA301 Audio Amplifier IC 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.2.2 BTL Operation 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.2.3 Single-Ended Operation 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.2.4 Module Gain 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.2.5 Shutdown 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.3 Using The TPA301 EVM With The Plug-N-Play Evaluation Platform 3-6. . . . . . . . . . . . . . .

3.3.1 Installing and Removing EVM Boards 3-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.3.2 Signal Routing 3-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.3.3 Muting 3-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.3.4 Power Requirements 3-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.3.5 Inputs and Outputs 3-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.4 Using The TPA301 EVM Stand-ALone 3-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.4.1 TPA301 EVM Connected for BTL Output 3-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.4.2 TPA301 EVM Connected for Single-Ended Output 3-12. . . . . . . . . . . . . . . . . . . . . .

3.5 TPA301 Audio Amplifier Evaluation Module Parts List 3-13. . . . . . . . . . . . . . . . . . . . . . . . . .

Running Title—Attribute Reference

Figures

1–1 The TI TPA301 Audio Amplifier Evaluation Module 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–1 Quick Start Platform Map 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–2 Quick Start Module Map 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–1 The TI Plug-N-Play Audio Amplifier Evaluation Platform 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–2 TPA301 EVM 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–3 TPA301 EVM Schematic Diagram 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–4 TPA301 Audio Amplifier IC 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–5 Platform Signal Routing and Outputs 3-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–6 Mute/Mode and Polarity Control 3-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–7 Typical Headphone Plug 3-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–8 TPA301 EVM Connected for Stereo BTL Output 3-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–9 TPA301 EVM Connected for Stereo Single-Ended Output 3-12. . . . . . . . . . . . . . . . . . . . . . . . .

Tables

2–1 Typical TI Plug-N-Play Platform Jumper and Switch Settings for the TPA301 2-1. . . . . . . . . .

2–2 Platform Jumper and Switch Settings for the TPA301 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–1 TPA301 EVM Parts List 3-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1

Introduction

This chapter provides an overview of the Texas Instruments (TI) TPA301

audio amplifier evaluation module (SLOP115). It includes a list of EVM

features, a brief description of the module illustrated with a pictorial diagram,

and a list of EVM specifications.

Topic Page

1.1 Feature Highlights 1–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.2 Description 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.3 TPA301 EVM Specifications 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 1

Feature Highlights

1-2 Introduction

1.1 Feature Highlights

TheTITPA301audioamplifierevaluationmoduleandtheTIplug-n-playaudio

amplifier evaluation platform include the following features:

TPA301 Low-Voltage Audio Power Amplifier Evaluation Module

Single channel, bridge-tied load (BTL) or single-ended operation

3.3-V and 5-V operation

350 mW output power into 8 Ωat 5 V, BTL

Ultra-low current consumption in shutdown/mute mode

Internal thermal and short-circuit protection

Module gain adjustable between approximately 2 and 22

Quick and Easy Configuration With the TI Plug-N-Play Audio Amplifier

Evaluation Platform

Evaluation module is designed to simply plug into the platform, auto-

matically making all signal, control, and power connections

Platform provides flexible power options

Jumpers on the platform select power and module control options

Switches on the platform route signals

Platformprovides quick and easy audio inputand output connections

Platform Power Options

Onboard 9-V battery

External 5-V –15-V DC VCC supply inputs

External regulated VDD supply input

Socket for on-board 5 V/3.3 V VDD voltage regulator EVM

Onboard overvoltage and reverse polarity power protection

Platform Audio Input and Output Connections

Left and right RCA phono jack inputs

Miniature stereo phone jack input

Left and right RCA phono jack outputs

Left and right compression speaker terminal outputs

Miniature stereo headphone jack output

Description

1-3

Introduction

1.2 Description

TheTPA301audiopoweramplifierevaluationmoduleisacomplete,low-pow-

er single-channel audio power amplifier. It consists of the TI TPA301 350-mW

low-voltage audio power amplifier IC along with a small number of other parts

mounted on a circuit board that is approximately one and a quarter inches

square (Figure 1–1).

Figure 1–1.The TI TPA301 Audio Amplifier Evaluation Module

IN+

Shutdown

C6 C3 C5

OUT–

GND

OUT+

GND

GND+5 V

EVM

–3

Lit.#

SLOP 115

TPA301

Single in-line header pins are mounted to the underside of the module circuit

board to allow the EVM to be plugged into the TI plug-n-play audio amplifier

evaluationplatform, or to be wired directlyintoexisting circuitsandequipment

when used stand-alone.

The platform has room for a pair of TPA301 evaluation modules and is a

convenient vehicle for demonstrating TI’s audio power amplifier and related

evaluation modules. The EVMs simply plug into the platform, which auto-

matically provides power to the modules, interconnects them correctly, and

connectsthemtoaversatilearrayofstandardaudioinputandoutputjacksand

connectors. Easy-to-use configuration controls allow the platform and EVMs

to quickly model many possible end-equipment configurations.

There is nothing to build, nothing to solder, and nothing but the speakers

included with the platform to hook up.

1.3 TPA301 EVM Specifications

Supply voltage range, VDD 2.5 V to 5.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Supply current, IDD 250 mA, max. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Continuous output power, PO:8-ΩBTL, VDD=5 V: 350 mW. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

32-ΩBTL, VDD=5 V: 75 mW. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Audio input voltage, VI2 Vpp, max. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Minimum load impedance, RL8 Ω. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-4 Introduction

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