Texas Instruments TPA0122 Manual de usuario

TPA0122

Audio Power Amplifier

Evaluation Module

June 1999 Mixed-Signal Products

User’s Guide

SLOU043

IMPORTANT NOTICE

TexasInstruments andits subsidiaries(TI) reservethe rightto makechanges totheir productsor todiscontinue

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 acknowledgement, including those

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

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

accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent

TIdeemsnecessarytosupport thiswarranty. Specifictestingof allparametersofeachdevice isnotnecessarily

performed, except those mandated by government requirements.

CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF

DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL

APPLICATIONS”). TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, AUTHORIZED, OR

WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT DEVICES OR SYSTEMS OR OTHER

CRITICALAPPLICATIONS.INCLUSIONOFTIPRODUCTSINSUCHAPPLICATIONSISUNDERSTOODTO

BE FULLY AT THE CUSTOMER’S RISK.

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.

TIassumes noliabilityforapplicationsassistance orcustomer productdesign. TIdoes notwarrantorrepresent

thatanylicense,eitherexpressorimplied,isgrantedunderanypatentright,copyright,maskworkright,orother

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

semiconductor 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, warranty or endorsement thereof.

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.

TPA0122 Stereo 2-W Audio Power Amplifier

(literature number

SLOS247) This is the data sheet for the TPA0122 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

testedforcompliancewiththelimitsofcomputing devices pursuant to subpart

Jofpart 15ofFCCrules,which aredesignedtoprovidereasonableprotection

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 TPA0122 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 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

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

3.2 The TPA0122 Audio Power Amplifier Evaluation Module 3-3. . . . . . . . . . . . . . . . . . . . . . . . .

3.2.1 TPA0122 Audio Amplifier IC 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.2.2 Inputs and Gain 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.2.3 Differential Input 3-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.2.4 Depop Circuitry 3-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.2.5 BTL Operation 3-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.2.6 SIngle-Ended Operation 3-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.3 Using The TPA0122 EVM With the Plug-N-Play Evaluation Platform 3-8. . . . . . . . . . . . . . .

3.3.1 Installing and Removing EVM Boards 3-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.3.2 TPA0122 Module Jumper Settings and Switches 3-9. . . . . . . . . . . . . . . . . . . . . . . .

3.3.3 Signal Routing 3-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.3.4 Mute (Shutdown)/Mode 3-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.3.5 Power Requirements 3-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.3.6 Inputs and Outputs 3-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.4 Using The TPA0122 EVM Stand-Alone 3-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.4.1 TPA0122 EVM Connected for BTL Output 3-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.4.2 TPA0122 EVM Connected for Single-Ended Output 3-17. . . . . . . . . . . . . . . . . . . . .

3.5 TPA0122 Audio Power Amplifier Evaluation Module Parts List 3-18. . . . . . . . . . . . . . . . . . .

Running Title—Attribute Reference

Figures

1–1 The TI TPA0122 Audio Amplifier Evaluation Module 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

2–2 Module Preparation 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–3 Quick Start Module Map 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

3–2 TPA0122 EVM 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–3 TPA0122 EVM Schematic Diagram 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–4 TPA0122 Amplifier IC 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–5 TPA0122 EVM Jumpers and Switches 3-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–6 Platform Signal Routing and Outputs 3-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–7 Mute/Mode and Polarity Control 3-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–8 Typical Headphone Plug 3-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–9 TPA0122 EVM Connected for Stereo BTL Output 3-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–10 TPA0122 EVM Connected for Stereo Single-Ended Output 3-17. . . . . . . . . . . . . . . . . . . . . . . .

Tables

2–1 Typical TI Plug-N-Play Platform Jumper and Switch Settings for the TPA0122 2-1. . . . . . . . .

2–2 Typical TPA0122 EVM Jumper Settings 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–3 Platform Jumper and Switch Settings for the TPA0122 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–4 Typical TPA0122 EVM Jumper Settings 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–5 TPA0122 EVM Gain Settings 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–6 TPA0122 EVM Gain Settings 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–1 TPA0122 EVM Gain Settings 3-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–2 TPA0122 EVM Gain Settings 3-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–3 Typical TPA0122 EVM Jumper Settings for BTL Stand-Alone 3-16. . . . . . . . . . . . . . . . . . . . . .

3–4 Typical TPA0122 EVM Jumper Settings for Single-Ended Stand-Alone 3-17. . . . . . . . . . . . . .

3–5 TPA0122 EVM Parts List 3-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1

Introduction

This chapter provides an overview of the Texas Instruments (TI) TPA0122

audio amplifier evaluation module (SLOP206). 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 TPA0122 EVM Specifications 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 1

Feature Highlights

1-2

Introduction

1.1 Feature Highlights

The TI TPA0122 audio amplifier evaluation module and the TI plug-n-play

audio amplifier evaluation platform include the following features:

TPA0122 Stereo 2-W Audio Power Amplifier Evaluation Module

Internal depop circuitry to minimize transients in outputs

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

2 W per channel output power into 3 Ωat 5 V, BTL

Low current consumption in shutdown mode (150 µA)

Internal input MUX selects among two sets of stereo inputs

Four selectable BTL gain settings: 2, 6, 12, and 24 V/V

Differential stereo inputs

PC Beep input

Quick and Easy Configuration with The TI Plug-N-Play Audio Amplifier

Evaluation Platform

Evaluation module is designed to simply plug into the platform,

automatically 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 andeasyaudio input andoutput connections

Platform Power Options

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

External regulated VDD supply input

Socket for onboard 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

The TPA0122 stereo 2-W audio power amplifier evaluation module is a

complete, 2-watt per channel stereo audio power amplifier. It consists of the

TI TPA0122 stereo 2-W audio power amplifier IC along with a small number

of other parts mounted on a circuit board that measures approximately 2

inches by 1

inches (Figure 1–1).

Figure 1–1.The TI TPA0122 Audio Amplifier Evaluation Module

GND

ROUT+

ROUT–

SE/BTL

SHUTDOWN

GND

LOUT–

LOUT+

C10

C12

VDD GND

L IN+

GND

L LINE–

L HP

VDD GND

R HP

R LINE–

GND

R IN+

TPA0122 EVM Board SLOP206

TEXAS

INSTRUMENTS

SHUTDOWN

TP2

TP1

C11

Single in-line header pins extend from the underside of the module circuit

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

evaluationplatform,ortobewireddirectlyinto existing circuits and equipment

when used stand-alone.

The platform has room for a single TPA0122 evaluation module and is a

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

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

automatically provides power to the modules, interconnects them correctly,

andconnectsthemtoaversatilearrayofstandardaudioinputandoutputjacks

and 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 TPA0122 EVM Specifications

Supply voltage range, VDD 4.5 V to 5.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Supply current, IDD 2 A max. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Continuous output power per channel, PO: 3-ΩBTL, VDD=5 V 2 W. . . . . . . . . . . . . . . . . . . . . . .

Audio input voltage, VI,: HP input 4.5 Vpp max. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Line input 4.5 Vpp max. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PC BEEP input 5 Vpp max. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Minimum load impedance, RL3 Ω. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-4

Introduction

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