Texas Instruments TPA0252 Manual de usuario



  

 

2001 Mixed-Signal Products

User’s Guide

SLOU102

IMPORTANT NOTICE

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iii

Read This First



How to Use This Manual

This document contains the following chapters:

Chapter 1—Introduction

Chapter 2—Operation

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



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.



TPA0252 Stereo 2-W Audio Power Amplifier

With Digital

Volume Control

(literature number SLOS288) This is the data

sheet for the TPA0252 audio amplifier integrated circuit.

Running Title—Attribute Reference

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

tested for compliance with the limits of computing devices pursuant to subpart

J of part 15 of FCC rules, which are designed to provide reasonable protection

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

Contents



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

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

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

1.3 TPA0252 EVM Specifications 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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 Stand-Alone Connection Diagram 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.5 Reference 2-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.5.1 EVM Schematic 2-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.5.2 EVM Parts List 2-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.5.3 Module PCB Layers 2-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .



1–1 The TI TPA0252 Audio Amplifier Evaluation Module 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

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

2–3 Stand-Alone Module Preparation 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–4 TPA0252 EVM Connected for Stereo BTL Output 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–5 TPA0252 EVM Schematic 2-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–6 TPA0252 EVM PCB 2-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–7 TPA0252 EVM Silkscreen 2-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–8 TPA0252 EVM Bottom Layer 2-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .



2–1 Platform Jumper and Switch Settings for the TPA0252 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–2 Typical TPA0252 EVM Jumper Settings 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–3 Typical TPA0252 EVM Jumper Settings 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–4 TPA0252 EVM Parts List 2-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1

Introduction



This chapter provides an overview of the Texas Instruments TPA0252 audio

amplifier evaluation module (SLOP333). 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 TPA0252 EVM Specifications 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 1

Feature Highlights

1-2

Introduction

1.1 Feature Highlights

The TI TPA0252 audio amplifier evaluation module and the TI plug-n-play

audio amplifier evaluation platform include the following features:

TPA0252 stereo 2-W audio power amplifier evaluation module

Internal depop circuitry to minimize transients in outputs

Powers up at mute volume level to avoid pop

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

Digital volume control from 20 dB to –40 dB

Internal memory restores volume setting after shutdown or power

down

Microprocessor mode volume control

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

Platform provides quick and easy audio input and output 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 TPA0252 stereo 2-W audio amplifier evaluation platform is a complete,

2 W per channel stereo audio power amplifier. It consists of the TI TPA0252

stereo 2-W audio power amplifier IC along with a small number of other parts

mounted on a circuit board that measures approximately 2 1/4 inches by 1 1/2

inches (see Figure 1–1).

Figure 1–1.The TI TPA0252 Audio Amplifier Evaluation Module

GND

ROUT+

ROUT–

SE/BTL

S1 SHUTDOWN

GND

LOUT–

LOUT+

J1 UP

VDD GND

L IN+

GND

L LINE–

L HP

VDD GND

R HP

R LINE–

GND

R IN+

C12

TPA0252 EVM

SLOP333

TEXAS

INSTRUMENTS

SHUTDOWN

S3 DOWN

C13

C10

C11

TP1

HP/LINE

HP–SE

D2 VAUX

TP2

J2 DOWN

J3 CLK

PCBEEP

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

evaluation platform, or to be wired directly into existing circuits and equipment

when used stand-alone.

The platform has room for a single TPA0252 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,

and connects them to a versatile array of standard audio input and output jacks

and connectors. The 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 TPA0252 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 5 Vpp max. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Line input 5 Vpp max. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PC beep input 5 Vpp max. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

1-4

Introduction

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