Texas Instruments TPA2000D4 Manuale utente

TPA2000D4

Filterless Class D With

Stereo Headphone

Audio Power Amplifier EVM

2001 Mixed-Signal Products

User’s Guide

SLOU091A

iii

Read This First

Preface

How to Use This Manual

This document contains the following chapters:

Chapter 1—Introduction

Chapter 2—Operation

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.

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

testedforcompliancewiththelimitsofcomputingdevicespursuanttosubpart

Jofpart15ofFCCrules,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.

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 TPA2000D4 EVM Specifications 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 Operation 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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.4 Reference 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.4.1 TPA2000D4 Audio Power Amplifier EVM Parts List 2-7. . . . . . . . . . . . . . . . . . . . . .

2.4.2 TPA2000D4 Filterless Class-D EVM Schematic 2-8. . . . . . . . . . . . . . . . . . . . . . . . .

2.4.3 TPA2000D4 Filterless Class-D EVM PCB Layers 2-9. . . . . . . . . . . . . . . . . . . . . . . .

Running Title—Attribute Reference

Figures

1–1 The TI TPA2000D4 Audio Amplifier EVM—Top View 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

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

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

2–4 TPA2000D4 Class-D EVM Schematic Diagram 2-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–5 TPA2000D4 Filterless Class-D EVM Top Assembly 2-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–6 TPA2000D4 Filterless Class-D EVM Bottom Assembly 2-10. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Tables

2–1 Typical TI Plug-N-Play Platform Jumper and Switch Settings for the TPA2000D4 2-1. . . . . .

2–2 Typical TPA2000D4 EVM Jumper Settings 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–3 Platform Jumper and Switch Settings for the TPA2000D4 2-3. . . . . . . . . . . . . . . . . . . . . . . . . .

2–4 Typical TPA2000D4 EVM Jumper Settings 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–5 TPA2000D4 EVM Gain Settings 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–6 TPA2000D4 EVM Parts List 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1

Introduction

This chapter provides an overview of the Texas Instruments (TI) TPA2000D4

filterless class-D audio with stereo headphone amplifier evaluation module

(SLOP329). It includes a list of EVM features, a brief illustrated description of

the module, and a list of EVM specifications.

Topic Page

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

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

1.3 TPA2000D4 EVM Specifications 1–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 1

Feature Highlights

1-2 Introduction

1.1 Feature Highlights

The TI TPA2000D4 audio amplifier evaluation module and the TI plug-n-play

audio amplifier evaluation platform include the following features:

TPA2000D4Stereo2-WFilterlessClass-DWithStereoHeadphoneAudio

Power Amplifier Evaluation Module

Class-D without output filter

Stereo headphone output jack

Internal depop circuitry to minimize transients in outputs

High efficiency

Low distortion

Low supply current (9 mA for class-D, 7 mA for stereo headphone)

2 W per channel output power into 4 Ωat 5 V

Low current consumption in shutdown mode

Four selectable gain settings: 5, 11, 17, and 23 dB

Differential stereo inputs

32-pin TSSOP PWP package

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 andoutputconnections

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 TPA2000D4 filterless class-D stereo audio power amplifier evaluation

module is a complete, 2-W per channel class-D stereo audio power amplifier

with stereo headphone output jack that can operate without an output filter. It

consists of the TI TPA2000D4 class-D stereo 2-W audio power amplifier IC

with stereo headphone output jack, along with a small number of other parts

mountedonacircuitboardthatmeasuresapproximately2-1/4inchesby1-1/2

inches (see Figure 1–1).

Figure 1–1.The TI TPA2000D4 Audio Amplifier EVM—Top View

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,ortobewireddirectlyintoexistingcircuitsandequipment

when used stand-alone.

The platform has room for a single TPA2000D4 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.

TPA2000D4 EVM Specifications

1-4 Introduction

1.3 TPA2000D4 EVM Specifications

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

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

Continuous output power per channel, BTL, PO: 4 Ω, VDD = 5 V 2 W. . . . . . . . . . . . . . . . . . . . . .

Continuous output power per channel, headphones, PO: 32 Ω, VDD = 5 V 85 mW. . . . . . . . . .

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

Minimum load impedance, headphone, RL16 Ω. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-1

Operation

The steps in this chapter can be followed to quickly prepare the TPA2000D4

filterless class-D audio amplifier EVM for use. Using the TPA2000D4 with the

TI plug-n-play audio amplifier evaluation platform is a quick and easy way to

connectpower, signal and controlinputs,andsignaloutputs to the EVMusing

standard connectors. However, the audio amplifier evaluation module can be

used stand-alone by making connections directly to the module pins, and can

be wired directly into existing circuits or equipment.

Theplatformswitchandjumper settings shown in Table2–1aretypicalforthe

TPA2000D4 EVM and will cause the TPA2000D4 to shut down when a plug

is inserted into platform headphone jack J10.

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

TPA2000D4

EVM JP4 JP5 JP6 JP7 JP8 S2 S3

P-N-P Platform X ON Mute X Lo Note 2 U5

Notes: 1) ON = Jumper installed, OFF = Jumper NOT Installed, X = Don’t care

2) SetS2 to ONwhensignalconditioning board isinstalledinU1; setS2

to OFF when no signal conditioning board is installed.

Table 2–2. Typical TPA2000D4 EVM Jumper Settings

EVM GAIN0 GAIN1

TPA2000D4 ON ON

Note: ON = Jumper installed, OFF = Jumper NOT Installed, X = Don’t care

Topic Page

2.1 Precautions 2–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

2.3 Quick Start List for Stand-Alone 2–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.4 Reference 2–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 2

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