Texas Instruments TPA751 MSOP Manuel utilisateur

February 2001 Mixed-Signal Products

TPA751 MSOP

Audio Power Amplifier

Evaluation Module

User’s Guide

SLOU112

IMPORTANT NOTICE

Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue

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 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

TI deems necessary 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.

TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent

that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other

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.

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.



TPA751 700-mW Low-Voltage Audio Power Amplifier

(literature

number SLOS336) This is the data sheet for the TPA751 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

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 TPA751 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 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.4 Stand-Alone Connection Diagram 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.5 Reference 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.5.1 TPA751 EVM Schematic Diagram 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.5.2 TPA751 MSOP Audio Power Amplifier Evaluation Module Parts List 2-7. . . . . . . .

2.5.4 TPA751 EVM PCB Layers 2-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figures

1–1 The TI TPA751 Audio Amplifier Evaluation Module 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

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

2–3 TPA751 EVMs Connected for Stereo BTL Output 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–4 TPA751 EVM Schematic Diagram 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–5 TPA751 EVM PCB 2-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–6 TPA751 EVM Bottom Layer 2-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Tables

2–1. Platform Jumper and Switch Settings for the TPA751 EVM 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–2. TPA751 EVM Parts List 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1

Introduction

This chapter provides an overview of the Texas Instruments (TI) TPA751

MSOP Audio Power Amplifier Evaluation Module (SLOP357). 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 TPA751 EVM Specifications 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 1

Feature Highlights

1-2

Introduction

1.1 Feature Highlights

The TI TPA751 MSOP Audio Power Amplifier Evaluation Module and the TI

Plug-n-Play Audio Amplifier Evaluation Platform include the following

features:

TPA751 low-voltage audio power amplifier evaluation module

Single-channel, bridge-tied load (BTL)

2.5-V and 5.5-V operation

700-mW output power into 8 Ωat 5 V, BTL

Ultra-low current consumption in shutdown mode

Internal thermal and short-circuit protection

Module gain is set at –4 V/V in BTL mode, –2 V/V in SE mode

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

Onboard 9-V battery

External 5-V to 15-V (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

The TPA751 MSOP Audio Power Amplifier Evaluation Module is a complete,

low-power single-channel audio power amplifier. It consists of the TI TPA751

700-mW low-voltage audio power amplifier IC in a very small MSOP package,

along with a small number of other parts mounted on a circuit board that is

approximately one and a quarter inches square (see Figure 1–1).

Figure 1–1.The TI TPA751 Audio Amplifier Evaluation Module

OUT+

IN–

IN+

VDD GND

U1 †

Shutdown

OUT–

GND

TEXAS

INSTRUMENTS

SLOP357

TPA751 MSOP EVM

R1 +

†Due to the very small size of the MSOP IC package, the standard part number TPA751 is

replaced with the code TIATC.

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

board. These pins 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, with room for a pair of TPA751 evaluation modules, 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. 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 TPA751 EVM Specifications

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

Supply current, IDD 450 mA, max. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Continuous output power, PO:8-ΩBTL, VDD = 5 V 700 mW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

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

1-4

Introduction

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