Texas Instruments TAS5110D6REF Manuale utente

TAS5110D6REF

Reference Design for the TAS5110DAD Digital

Audio PWM Power utput Stage

July 2003 Digital Audio/Application

User’s Guide

SLEU032

IMPORTANT NOTICE

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EVM IMPORTANT NOTICE

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

Thisevaluationkit being soldbyTI is intendedforusefor ENGINEERING DEVELOPMENT OR EVALUATION

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

ShouldthisevaluationkitnotmeetthespecificationsindicatedintheEVMUser’sGuide,thekitmaybereturned

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

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

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EVM WARNINGS AND RESTRICTIONS

It is important to operate this EVM within the specified input and output ranges described in

the EVM User’s Guide.

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.

Applyingloadsoutsideofthespecifiedoutputrangemayresultinunintendedoperationand/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.

Duringnormaloperation,somecircuitcomponentsmayhavecasetemperaturesgreaterthan

60°C.TheEVM isdesignedto operateproperlywith certain componentsabove 60°C aslong

astheinputandoutput rangesare maintained.Thesecomponentsincludebut arenot limited

tolinearregulators,switchingtransistors,passtransistors,andcurrentsenseresistors.These

typesof devicescanbeidentifiedusingtheEVM schematiclocated intheEVMUser’sGuide.

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

Information About Cautions and Warnings

iii

Preface

Read This First

About This Manual

This manual describes the operation of the TAS5110D6REF evaluation

module from Texas Instruments.

How to Use This Manual

This document contains the following chapters:

-Chapter 1 –Introduction

-Chapter 2 –System Interfaces

-Chapter 3 –Electrical Specifications and Typical Characteristics Graphs

-Chapter 4 –Schematic, Parts List, PCB Specification, and PCB Layout

Information About Cautions and Warnings

This book may contain cautions and warnings.

This is an example of a caution statement.

A caution statement describes a situation that could potentially

damage your software or equipment.

This is an example of a warning statement.

A warning statement describes a situation that could potentially

cause harm to you.

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

The following is a list of data manual that have detailed descriptions of the

integrated circuits used in the design of the TAS5110D6REF evaluation

module. The data manuals can be obtained at the URL http://www.ti.com.

Part Number Literature Number

TAS5110A

SN74LVC2G126DCT

TPS75333QPWP

SLES079

SCES205

SLVS241

Contents

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

1.1 TAS5110D6REF Features 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.2 PCB Key Map 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.3 Short-Circuit Protection and Fault Reporting Circuitry 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.3.1 Device Fault Reporting 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.3.2 Short-Circuit Protection 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.3.3 Autorecovery System 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 System Interfaces 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.1 PSU Interface (J150) 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2 PSU Control Interface (J160) 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.3 Loudspeaker Connectors (J240, J280, J340, J380, J440, and J480) 2-3. . . . . . . . . . . . . . .

2.4 PWM Interface (J100) 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3 Electrical Specifications and Typical Characteristics Graphs 3-1. . . . . . . . . . . . . . . . . . . . . . .

3.1 TAS5110D6REF Electrical Specifications 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.2 Physical Specifications 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.3 Typical Characteristics Graphs 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4 Schematic, Parts List, PCB Specification, and PCB Layout 4-1. . . . . . . . . . . . . . . . . . . . . . . . .

Contents

Figures

1–1 TDAA System With TAS5026REF/TAS5036 and TAS5110D6REF Modules 1-2. . . . . . . . . . .

1–2 Physical Structure for the TAS5110D6REF (Rough Outline) 1-3. . . . . . . . . . . . . . . . . . . . . . . . .

1–3 Auto Recovery Loop 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–1 Recommended TAS5110 Power-Up Sequence 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–2 Pin Numbers at the PSU Interface (Top View) 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–3 Pin Numbers at the PSU Control Interface 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–4 Pin Numbers at the Loudspeaker Connectors 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–5 Pin Numbers at PWM Interface (J100) 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–1 THD+N vs Frequency –Channel 1 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–2 THD+N vs Power –Channel 1, 3, and 5 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–3 THD+N vs Power –Channel 2, 4, and 6 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–4 FFT With –60 dB Input Signal –Channel 1 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–5 FFT at 40-W Output Power –Channel 1 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–6 Noise Floor –Channel 1 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–7 Channel Separation vs Frequency –Channel 1 3-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–8 Frequency Response –Channel 1 3-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Tables

1–1 Device Fault Reporting 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–1 J150 Pin Description 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–2 PSU Control Interface Pin Connections 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–3 Description of Loudspeaker Connectors 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–4 J100 Pin Description 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1

Introduction

The true digital audio amplifiers (TDAA) system consists of a PCM–PWM

modulator device and a PWM power output device. The PCM–PWM

processoracceptsaserialPCM digital audio stream and converts ittoa3.3-V

PWM audio stream. The TDAA output stage provides a large-signal PWM

output. The digital PWM signal is then demodulated providing power output

for driving loudspeakers. This patented technology provides low cost, high

quality, high efficient digital audio applicable to many audio systems

developed for the digital age.

The TAS5110D6REF reference design demonstrates the integrated circuit

TAS5110DAD from Texas Instruments (TI). The board does not contain any

PWMprocessors.A separateandcompatiblePWMprocessorboard (suchas

TAS5026REF) is available.

The TAS5110 is a single channel PWM power audio device. It contains

integrated gate drivers, four matched and electrically isolated

enhancement-mode N-channel power DMOS transistors, and protection and

fault-reporting circuitry. This device is optimized for use with the TAS50XX

PWM processor family.

Together with the TAS5026REF module or the TAS5036REF module, the

TAS5110D6REF module is a complete true digital audio amplifier system,

which includes digital volume control, headphone amplifier, and a subwoofer

output.

Topic Page

1.1 TAS5110D6REF Features 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.2 PCB Key Map 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.3 Short-Circuit Protection and Fault Reporting Circuitry 1-4. . . . . . . . . . .

Chapter 1

TAS5110D6REF Features

1-2

1.1 TAS5110D6REF Features

-Six channel TDAA reference design (double-sided plated-through PCB

layout)

-Supports noiseless self-contained protection system (short circuit and

thermal)

-Supports both two-level modulation (AD-modulation scheme) and three-

level modulation (BD-modulation scheme)

-Onboard subwoofer output (line level)

Figure 1–1.TDAA System With TAS5026REF/TAS5036 and TAS5110D6REF Modules

TAS5026REF/TAS5036REF

Module PWM Interface TAS5110D6REF

Module

Digital

Audio

Interface

Control

Interface

I2C Bus

Control Interface

I2C Bus

The TAS5026 processor is a two-level PCM-to-PWM modulator and the

TAS5036 processor is a three-level modulator.

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