Texas Instruments TPA032D03 User Manual

TPA032D03 Mono ClassĆD
Audio Power Amplifier
With Stereo Headphone Amplifier
Evaluation Module

User’s Guide

September 2000 Mixed-Signal Products

SLOU082

IMPORTANT NOTICE

T exas 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.

Copyright  2000, Texas Instruments Incorporated

Related Documentation From Texas Instruments

J

TI Plug-N-Play Audio Amplifier Evaluation Platform

Number SLOU011) provides detailed information on the evaluation
platform and its use with TI audio evaluation modules.

J

TP A032D03 CLASS-D AUDIO POWER AMPLIFIER

Number SLOS283) This is the data sheet for the TPA032D03
audio amplifier integrated circuit.

J

Design Considerations for Class-D Audio Power Amplifiers

(TI Literature Number SLOA031) This application report provides
detailed information on designing audio power amplifier systems
using TI class-D amplifier ICs

J

Reducing and Eliminating the Class-D Output Filter

(TI Literature Number SLOA023) This application report covers
output filter theory and design for class-D audio power amplifiers.

Preface

(TI Literature

(TI Literature

,

,

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.

Trademarks

PowerPAD is a trademark of Texas Instruments.

Chapter Title—Attribute Reference

iii

iv

Running Title—Attribute Reference

Contents

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

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

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

1.3 TPA032D03 Class-D EVM Specifications 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.3.1 Maximum 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.3.2 Typical 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

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

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

3.2 Plug-N-Play Platform Power Requirements and Connections 3-3. . . . . . . . . . . . . . . . . . . . .

3.3 Plug-N-Play Platform Inputs and Outputs 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.3.1 Inputs 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.3.2 Outputs 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.4 Control and Indicator Circuits 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.5 TPA032D03 Class-D EVM Test Points 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.6 Module Switches 3-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.6.1 S1 — Shutdown 3-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.6.2 S2 — Mute Switch 3-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.7 Using The TPA032D03 Class-D EVM Stand-Alone 3-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.7.1 Power Connections 3-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.7.2 Input Connections 3-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.7.3 Output Connections 3-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.7.4 Controls and Indicators 3-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.8 TPA032D03 Class-D EVM Bill of Materials 3-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.9 TPA032D03 Class-D EVM Schematic 3-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.10 TPA032D03 Class-D EVM PCB Layers 3-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter Title—Attribute Reference

v

Running Title—Attribute Reference

Figures

1–1 The TI TPA032D03 Mono Class-D Audio Power Amplifier EVM — Top View 1-3. . . . . . . . . .

1–2 The TI TPA032D03 Mono Class-D Audio Power Amplifier EVM — Bottom View 1-3. . . . . . .

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

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

3–2 Typical Headphone Plug 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–3 TPA032D03 Class-D EVM Stand-Alone Connections for Mono BTL Output 3-7. . . . . . . . . . .

3–4 TPA032D03 Class-D EVM Schematic Diagram. 3-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–5 TPA032D03 Class-D EVM Top Assembly. 3-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–6 TPA032D03 Class-D EVM Bottom Assembly 3-1 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–7 TPA032D03 Class-D EVM Top Layer 3-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–8 TPA032D03 Class-D EVM Second Layer . 3-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–9 TPA032D03 Class-D EVM Third Layer. 3-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–10 TPA032D03 Class-D EVM Bottom Layer . 3-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

T ables

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

2–2 Platform Jumper and Switch Settings for the TPA032D03 2-3. . . . . . . . . . . . . . . . . . . . . . . . . .

3–1 Platform Jumper and Switch Settings for the TPA032D03 EVM Power Inputs 3-3. . . . . . . . .

3–2 TPA032D03 Class-D EVM Fault Indicator Table 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–3 TPA032D03 Class-D EVM Test Points 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–4 TPA032D03 Class-D EVM Bill of Materials 3-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TPA032D03 Class-D EVM 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

vi

Chapter 1

Introduction

This chapter provides an overview of the Texas Instruments (TI) TPA032D03
mono class-D audio power amplifier evaluation module (SLOP310). 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 TP A032D03 Class-D EVM Specifications 1–4. . . . . . . . . . . . . . . . . . . . . . . .

Introduction

1-1

Feature Highlights

1.1 Feature Highlights

The TI TPA032D03 mono class-D audio power amplifier evaluation module
and the TI plug-n-play audio amplifier evaluation platform include the following
features:

-

TPA032D03 Mono Class-D Audio Power Amplifier with Stereo Head­phone Amplifier Evaluation Module

J

J

J

J

J

J

J

J

J

J

Internal depop circuitry to greatly reduce turn-on transients in outputs
Single channel, class D bridge-tied load (BTL) only operation
12 V operation
10 W BTL output into 4 Ω at 12 V
Low current consumption in shutdown/mute mode (20 µA/10 mA) ??
Internal gain set to 25 dB
IC shutdown, mute, and mode control inputs — TTL logic level
High efficiency
Class AB stereo headphone driver — capable of 50 mW into 32 Ω
Onboard stereo headphone output jack

J

CE tested and approved.

-

Quick and Easy Configuration With the TI Plug-N-Play Audio Amplifier
Evaluation Platform

J

Evaluation module is designed to simply plug into the platform,
automatically making all signal, control, and power connections

J

Platform provides flexible power options

J

Jumpers on the platform select power and module control options

J

Switches on the platform route signals

J

Platform provides quick and easy audio input and output connections

-

Platform Power Options

J

External 5-V – 15-V VCC supply inputs

J

External regulated VDD supply input

J

Socket for onboard 5 V/3.3 V VDD voltage regulator EVM

J

Onboard overvoltage and reverse polarity power protection

-

Platform Audio Input and Output Connections

J

Left and right RCA phono jack inputs

J

J

J

J

1-2

Miniature stereo phone jack input
Left and right RCA phono jack outputs
Left and right compression speaker terminal outputs
Miniature stereo headphone jack output

Introduction

1.2 Description

The TP A032D03 mono class-D audio power amplifier evaluation module is a
complete, 10-W mono audio power amplifier. It consists of the TI TPA032D03
mono class-D audio power amplifier IC along with a small number of other
parts mounted on a circuit board that measures approximately 2¼ inches by
1¾ inches (Figure 1–1 and 1–2).

Figure 1–1.The TI TPA032D03 Mono Class-D Audio Power Amplifier EVM —

C19 C20

SLOP310 TPA032D03 EVM Board

GND

VCC

Description

Top View

RHP

GND –IN+ GND

R1
Mode LHP

R3

J1

R12

C1

R4

R5

C3
C4

R2
C2

C5

SD
S1

Mute
S2

R6

R11

TP3

TP2

C12

+

R14

C11

R13

TP1

VDD

U1

C17

C16

C18

R9R8R7
R10

GND

L1

VCC

2000

Instruments

Texas

Mute

SD

OUT–

L2

OUT+

Note: Capacitor C1 1 is optional (not assembled) and a location for it on the EVM PCB has been provided to increase design

flexibility and allow decoupling capacitance to be added.

Figure 1–2.The TI TPA032D03 Mono Class-D Audio Power Amplifier EVM —

C22

C23

Bottom View

C7

C6

C9

C8

C10

C13

C14

C15

C21

Introduction

1-3

TPA032D03 Class-D EVM Specifications

Single in-line header pins extend from the underside of the module circuit
board to allow the EVM to either 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 TP A032D03 class-D evaluation module and
is a convenient vehicle for demonstrating TI’s audio power amplifier and
related evaluation modules. The EVM simply plugs 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 TPA032D03 Class-D EVM Specifications

All measurements made with VDD = 12 V and RL = 4 Ω, unless otherwise noted.

1.3.1 Maximum

Supply voltage range, V
Supply current, I

DD

Continuous output power per channel, BTL, P

Continuous output power per channel, headphones, PO: 32-Ω SE 50 mW. . . . . . . . . . . . . . . . . .

Audio input voltage, class-D, V
Audio input voltage, headphone, V

DD

10 W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

O

I

I

1.3.2 Typical

Supply current, no input, class-D active, I
Supply current, no input, headphone active, I
Supply current, EVM mute, class-D active, I
Supply current, EVM mute, headphone active, I
Supply current, EVM shutdown, I

DD

Gain, class-D 25 dB. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Gain, headphone
Crosstalk, headphone, P

0 dB. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

= 30 mW @ 1 kHz –70 dB. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

O

Total harmonic distortion + noise, class-D, P
Total harmonic distortion + noise, headphone, P

DD

DD

DD

DD

= 1 W @ 1 kHz 0.14 %. . . . . . . . . . . . . . . . . . . . . .

O

= 30 mW @ 1 kHz 0.3 %. . . . . . . . . . . . . . . . .

O

9 V to 14 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.6 A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

350 mVrms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.6 Vrms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

55 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.5 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

147 µA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-4

Introduction

Chapter 2

Quick Start

Follow the steps in this chapter to quickly prepare the TPA032D03 mono
class-D audio amplifier EVM for use. Using the TP A032D03 class-D EVM with
the TI plug-n-play audio amplifier evaluation platform is a quick and easy way
to connect power, signal and control inputs, and signal outputs to the EVM
using standard connectors. However, the audio amplifier evaluation module
can be used stand-alone by making connections directly to the module pins,
and it can be wired directly into existing circuits or equipment.

The platform switch and jumper settings shown in T able 2–1 are typical for the
TPA032D03 class-D EVM. There are no jumpers or switches to set on
the TPA032D03 class-D EVM board, itself.

Table 2–1. Typical TI Plug-N-Play Platform Jumper and Switch Settings for the
TPA032D03 Class-D EVM

POWER TYPE (Note 2) JP1 JP2 JP3 JP4 JP5 JP6 JP7 JP8 S1 S2 (Note 3) S3

VCC (J1) ON OFF OFF ON ON Mute X Lo ON OFF U5

AC/DC (J2) OFF ON OFF ON ON Mute X Lo ON OFF U5

Notes: 1) ON = Jumper installed, OFF = Jumper

2) Install a voltage regulator EVM (SLVP097) in platform socket U6 for VDD power to EVM control inputs.

3) Set to ON when Tone Control Board SLOP109 is installed in U1, otherwise set to OFF.

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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Quick Start

2-1

Precautions

2.1 Precautions

Power Supply Input Polarity and Maximum Voltage
Always ensure that the polarity and voltage of the external power

connected to V
input connector J6 are correct. Overvoltage or reverse-polarity

power input connector J1, J2, and/or VDD power

CC

power applied to these terminals can open onboard soldered-in
fuses and cause other damage to the platform, installed evaluation
modules, and/or the power source.

Inserting or Removing EVM Boards
Do not insert or remove EVM boards with power applied — damage

to the EVM board, the platform, or both may result.

Figure 2–1.

+

7

Power

Audio
Input

Input

In

12
13

17

VCC

In

AC/DC

J1

D4

J2

In

In

In

1997

Quick Start Platform Map

SOURCE

Right

J3

Stereo

J4

Left

J5

INSTRUMENTS

JP2

DC

VCC(J1)

D3

JP1

AC/DC

(J2)

D2

D1

Batt

JP3

VR1

Signal Conditioning

****CAUTION****
Do not insert or remove
EVM boards with power

TEXAS

Plug-N-Play Audio Amplifier
Evaluation Platform
SLOP097 Rev. C.1

F1

LED1

VCC

applied

C1+

R1

U1

Off Pwr

1

GND

On

S1

Audio
Power
Amps

OnOff

ConditioningS2

TP1

ICC
JP4

B1

IDD

U5

119 108

JP5

U3 U4

R2

U2-U4

U5

HP

Source

SUPPLY

U2

HP(U5)

S3

R4

POWER

U6

LED2

VDD

JP6

Polarity

Lo
Hi

JP8

JP7

+
+

R3

F2

J7

Right

Out

J8

+– +–
Right

Out

Left

Out

Mode
Mute

Spk(U2-U4)

J9

Left

Out

Stereo

C3 C2

HP Out

In/Out

VDD

J10

R5

J6

VR2

DC
Power
In/Out

+

Speaker
Output

14

Headphone
Output

5

2-2

16

3

2

4 6

Quick Start

Quick Start List for Platform

2.2 Quick Start List for Platform

Follow these steps when using the TPA032D03 class-D EVM with the TI
plug-n-play audio amplifier evaluation platform (see the platform user’s guide,
SLOU011, for additional details). Numbered callouts for selected steps are
shown in Figure 2–1 and details appear in Chapter 3.

-

Platform Preparations

1) Ensure that all external power sources and platform power switch S1 are
set to

OFF

.

2) Install a TP A032D03 module in platform socket U2, taking care to align the
module pins correctly (EVM power pins engage sockets U2 and U3).

3) Set switch S2 to

4) Set switch S3 to

5) Set jumper JP6 to select the

6) Set control signal Polarity jumper JP8 to

Table 2–2. Platform Jumper and Switch Settings for the TPA032D03

POWER TYPE (Note 2) JP1 JP4 JP5 JP6 JP7 JP8 S1 S2 (Note3) S3

VCC (J1) ON ON ON Mute X Lo ON OFF U5

Notes: 1) ON = Jumper installed, OFF = Jumper

2) Install a voltage regulator EVM (SLVP097) in platform socket U6 for VDD power to EVM control inputs.

3) Set to ON T one Control Board SLOP109 is installed in U1.

OFF

.

U5

.

NOT

Installed, X = Don’t care

Mute

control input.

Lo.

-

Power supply

7) Connect a

OFF

12-V

regulated power supply (ensure power supply is set to

) to J1, taking care to observe marked polarity.

8) Set jumper JP1 for dc source to be from input J1.

9) Set jumper JP4 for VCC power to EVMs.

10) Install a voltage regulator EVM (SLVP097) in platform socket U6.

11) Set jumper JP5 for VDD power to EVMs.

-

Inputs and outputs

12) Ensure that the audio signal source level is set to minimum.

13) Connect the audio source to left and right RCA phono jacks J3 and J5 or
mono miniature phone jack J4.

14) Connect 4-Ω – 8-Ω speakers to left RCA jack J9 or to stripped wire speaker
connectors J8.

-

Power up

15) Verify correct voltage and input polarity and set the external power supply
and platform power switch S1 to

ON.

Platform LED1 and LED2 should light indicating the presence of VCC and
VDD, and the evaluation module(s) installed on the platform should begin
operation.

16) Set switch S2 to ON if tone control board SLOP109 is installed in U1.

17) Adjust the signal source level as needed.

Quick Start

2-3

Quick Start List for Stand-Alone

2.3 Quick Start List for Stand-Alone

Follow these steps to use the TPA032D03 class-D EVM stand-alone or to
connect it into existing circuits or equipment. Connections to the TP A032D03
module header pins can be made via individual sockets, wire-wrapping, or
soldering to the pins, either on the top or the bottom of the module circuit board.

-

Power supply

1) Ensure that all external power sources are set to

OFF.

2) Connect an external regulated power supply set to 12 V to the module
VCC and GND pins taking care to observe marked polarity. It is only

necessary to use the ground pins adjacent to the module power pins.

3) Connect an external regulated power supply set to 5 V to the module VDD
pin taking care to observe marked polarity.

-

Inputs and outputs

4) Ensure that audio signal source level adjustments are set to minimum.

5) Connect the audio source across the module IN+ and IN– pins for class-D
operation, taking care to observe marked polarity . For single-ended input,
the negative input pin (IN–) should be connected to the ground of the audio
signal source.

6) Connect a control signal to the module Mute pin, if necessary . The control
signal should be high (2 V to 5 V or left floating) for normal operation, or
low (tied to ground) to mute the output.

7) Connect a control signal to the module SD pin, if necessary. The control
signal should be high (2 V to 5 V or left floating) for normal operation, or
low (tied to ground) to shut down the TPA032D03 amplifier IC on the EVM.

2-4

Note that the control signals applied to the EVM Mute and SD inputs must have
sufficient current capability to overcome the 100-kΩ pullup resistor on each
input. Miniature pushbutton switches on the EVM allow manual shutdown (S2)
and manual muting (S1) of the amplifier.

8) Connect a 4-Ω – 8-Ω speaker to the module OUT+ and OUT– pins, taking
care to observe marked polarity.

-

Power up

9) Verify correct voltage and input polarity and set the external power supply
to

ON.

The EVM should begin operation.

10) Adjust the signal source level as needed.

Quick Start

Chapter 3

Details

This chapter provides details on the TP A032D03 IC evaluation module, a parts
list for the TPA032D03 class-D evaluation module, and module PCB layer
illustrations.

Topic Page

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

3.2 Plug-N-Play Platform Power Requirements and Connections 3-3. . . . .

3.3 Plug-N-Play Platform Inputs and Outputs 3-4. . . . . . . . . . . . . . . . . . . . . . .

3.4 Control and Indicator Circuits 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.5 TP A032D03 Class-D EVM Test Points 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . .

3.6 Module Switches 3-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.7 Using The TPA032D03 Class-D EVM Stand-Alone 3-7. . . . . . . . . . . . . . . .

3.8 TP A032D03 Bill of Materials 3-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.9 TP A032D03 Class-D EVM Schematic 3-10. . . . . . . . . . . . . . . . . . . . . . . . . . .

3.10 TPA032D03 Class-D EVM PCB Layers 3-11. . . . . . . . . . . . . . . . . . . . . . . . .

Details

3-1

Precautions

3.1 Precautions

Power Supply Input Polarity and Maximum Voltage
Always ensure that the polarity and voltage of the external power

connected to VCC power input connector J1, J2, and/or VDD power
input connector J6 are correct. Overvoltage or reverse-polarity
power applied to these terminals can open onboard soldered-in
fuses and cause other damage to the platform, installed evaluation
modules, and/or the power source.

Inserting or Removing EVM Boards
Do not insert or remove EVM boards with power applied — damage

to the EVM board, the platform, or both may result.

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

On

R1

U1

Off Pwr

S1

Audio
Power
Amps

OnOff

ConditioningS2

ICC
JP4

B1

IDD

JP5

Power

Input

Audio
Input

+

In

VCC

In

D4

AC/DC

J2

J1

In

In

In

SOURCE

DC

VCC(J1)

D3

Right

J3

Stereo

J4

Left

J5

JP2

JP1

AC/DC

(J2)

D2

Batt

D1

JP3

VR1

Signal Conditioning

F1

VCC

C1+

LED1

U3 U4

R2

SUPPLY

U2

POWER

U6

LED2

VDD

Out

Out

Out

J7

Right

J8

+– +–
Right

Left

F2

In/Out

VDD

J6

VR2

+

DC
Power
In/Out

Speaker
Output

****CAUTION****

Do not insert or remove

EVM boards with power

TEXAS

INSTRUMENTS

1997

applied

Plug-N-Play Audio Amplifier
Evaluation Platform
SLOP097 Rev. C.1

3-2

GND

TP1

U5

U2-U4

U5

HP

Source

HP(U5)

S3

R4

JP6

Polarity

Lo
Hi

JP7

+
+

R3

Mode

Mute

Spk(U2-U4)

Out

JP8

C3 C2

HP Out

J9

Left

Stereo

J10

R5

Headphone
Output

Details

Plug-N-Play Platform Power Requirements and Connections

3.2 Plug-N-Play Platform Power Requirements and Connections

The TPA032D03 mono class-D audio power amplifier evaluation module is
designed to operate from a supply voltage between 9 V and 14 V. For best
performance, the module should be operated at 12 V.

The TI plug-n-play audio amplifier evaluation platform provides several
options for powering the TPA032D03 class-D EVM. Table 3–1 shows the

platform

User’s Guide for the TI plug-n-play audio amplifier platform, TI Literature
Number SLOU011 for more information). The TPA032D03 class-D EVM
requires no setup for power source selection.

Table 3–1.Platform Jumper and Switch Settings for the TPA032D03 EVM Power Inputs

POWER TYPE (Note 2) JP1 JP2 JP3 JP4 JP5 JP6 JP7 JP8 S1 S2 (Note 3) S3

VCC (J1) ON OFF OFF ON ON Mute X Lo ON OFF U5

AC/DC (J2) OFF ON OFF ON ON Mute X Lo ON OFF U5

Notes: 1) ON = Jumper installed, OFF = Jumper

2) Install a voltage regulator EVM (SLVP097) in platform socket U6 for VDD power to EVM control inputs.

3) Set to ON when Tone Control Board SLOP109 is installed in U1, otherwise set to OFF.

jumper and switch settings for each power source option (see the

NOT

Installed, X = Don’t care

Although the TPA032D03 amplifier IC draws approximately 1.6 A from the
power supply during continuous full power output, peak current draw can be
as high as 2.3 A. Any power supply connected to the platform should be
capable of providing 2.3 A (peak) to avoid clipping of the output signal during
voltage peaks. Current consumption driving speakers at normal listening
levels is typically 0.1 A or less.

supply of 5 V is required for normal operation of the TP A032D03 EVM.

A V

DD

VDD can either be applied to the platform VDD power input terminals (J6) or a
voltage regulator (SLVP097 or equiv.) can be installed in platform socket U6
to provide V

from the platform VCC supply.

DD

The platform is equipped with overvoltage and reverse-polarity supply voltage
input protection in the form of fused crowbar circuits.

-

VDD voltage applied to platform screw terminals J6

MUST NOT

exceed
the absolute maximum rating for the TP A032D03 amplifier IC installed on
the evaluation module (5.5 V) or damage to the IC may result. In no case
should VDD voltage of the incorrect polarity or in excess of 6.0 V be applied
to screw terminals J6 of the platform, or the power protection circuit on the

line will trip.

V

DD

-

VCC voltage applied to the platform

MUST NOT

exceed the maximum
voltage input specified for the voltage regulator module installed in socket
U6 (12 V for the SLVP097), or damage to the voltage regulator module
may result. In no case should V

voltage applied to the platform exceed

CC

15 V, or the overvoltage protection circuit on the VCC bus will trip.

Details

3-3

Plug-N-Play Platform Inputs and Outputs

3.3 Plug-N-Play Platform Inputs and Outputs

The TI plug-n-play audio amplifier evaluation platform is equipped with several
standard conectors for audio inputs and outputs.

3.3.1 Inputs

In most cases, audio signals enter the platform through either a pair of RCA
phono jacks (J3 and J5) or a miniature (1/8″) mono phone jack (J4). Certain
signal conditioning and amplifier EVMs, however, may have additional signal
input connectors mounted on the module circuit board.

The platform audio signal input jacks (J3, J4, and J5) are of the closed-circuit
type, grounding the signal input lines when no plugs are inserted.

3.3.2 Outputs

Amplified audio output signals leave the platform through the left RCA phono
jack (J9) and the left pair of compression connectors for stripped speaker wires
(J8).

The audio output lines from the power amplifiers are separate all the way to
the edge of the platform (output jacks J8 and J9) — the OUT+ and OUT– lines
from the power amplifier sockets are not tied to each other or to platform
ground. This allows the TP A032D03 class-D power amplifier EVM to operate
in the highly-efficient bridge-tied load configuration when driving speakers.

The headphone jack (J10) is capacitively coupled to source select switch S3,
which connects J10 to the output lines of either the headphone amplifier
socket or the power amplifier sockets (Figure 3–2).

Figure 3–2.Typical Headphone Plug

Left Right GND

3-4

Details

3.4 Control and Indicator Circuits

Three main control circuits are provided with the TP A032D03. The mute circuit
grounds the output of the active amplifier, the mode circuit selects between the
class-D amplifier and the headphone amplifier, and the shutdown circuit
places the entire device into a power-saving sleep mode to minimize current
consumption. Each of these inputs is TTL compatible: less than 0.8 V applied
to these pins is considered a logic low, and any voltage greater than 2 V is
considered a logic high.

Two indicator pins are also provided for feedback when an under-voltage or
thermal fault exists. Module pins are provided for easy connection of off-board
control and monitoring. There are two active low fault indicator pins on the
TP A032D03 amplifier IC (IC pins 41 and 42) that provide feedback when a fault
condition exists. Signals on these pins provide the status of the acvtive
amplifier: operational, thermal fault, and under-voltage lockout. T able 3–2 lists
the possible output conditions of these pins and a description of the fault
indicated.

Table 3–2.TPA032D03 Class-D EVM Fault Indicator Table

Plug-N-Play Platform Inputs and Outputs

FAULT 0

(TP 1)

1 1 No fault. — The device is operating normally.
0 1 Charge pump under-voltage lockout (VCP-UV) fault. All low-side transistors are turned on, shorting

0 0 Thermal fault. All of the low-side transistors are turned on, shorting the load to ground. Once the

FAULT 1

(TP 2)

DESCRIPTION

the load to ground. Normal operation resumes when the charge pump voltage is restored (not a
latched fault), however the Fault
SHUTDOWN

junction temperature drops by 20°C, normal operation resumes (not a latched fault). The Fault

indication

, or the power supply.

remains active until cleared by cycling MUTE, SHUTDOWN, or the power supply.

indication

remains active until cleared by cycling MUTE,

3.5 TPA032D03 Class-D EVM Test Points

Test points have been included on the TPA032D03 class-D EVM to facilitate
user analysis of device performance and design adjustments. Table 3–3 lists
each test point and its corresponding function.

Table 3–3.TPA032D03 Class-D EVM Test Points

TEST

POINT

IC PIN or EVM

FUNCTION

1 HPVCC Onboard 5-V supply
2 FAULT_1 MSB for logic-level fault output signal, open drain
3 FAULT_0 LSB for logic-level fault output signal, open drain

FUNCTION

Details

3-5

Plug-N-Play Platform Inputs and Outputs

3.6 Module Switches

The TP A032D03 mono class-D audio amplifier evaluation module is equipped
with two pushbutton switches that allow the module shutdown and mute
functions to be manually activated.

3.6.1 S1 — Shutdown Switch

To have the module amplifier IC enter the shutdown mode, press the
Shutdown switch (S2) on the module. S2 connects the amplifier IC
SHUTDOWN pin to ground, forcing it into a low-power state. This function can
be controlled by an external control input to the SD module pin.

The shutdown mode reduces the amplifier IC current consumption to less than
1 µA compared to approximately 2.5 mA in the mute mode. The EVM
shutdown current is based on V
leakage currents, but will typically be 97 µA ±5% for VCC = 12 V and VDD = 5
V. The plug-n-play platform typically draws 60 mA of current.

3.6.2 S2 — Mute Switch

CC, VDD,

R2, R5, and R6, and capacitor

Pushbutton switch S1 on the TP A032D03 class-D EVM allows manual muting
of the amplifier IC. S1 connects the amplifier IC MUTE pin to ground, muting
the output. The EVM Mute control input pin also allows external control of this
function.

In the mute mode, the amplifier IC lowside output transistors are turned on,
shorting the load to ground. This reduces the EVM current to 2.5 mA.

3.6.3 J1 — Headphone Jack Mode Switch

EVM headphone jack J1 is equipped with an internal switch that grounds the

amplifier MODE pin
into the headphone jack, the IC MODE pin goes high and the IC headphone
amplifier goes active and the class-D amplifier shuts off.

until

a plug is inserted into the jack. When a plug is inserted

3-6

Details

Using The TPA032D03 Class-D EVM Stand-Alone

3.7 Using The TPA032D03 Class-D EVM Stand-Alone

Using the TP A032D03 mono class-D audio power amplifier evaluation module
stand-alone is much the same as using it with the platform. The same 9-V to
14-V power supply range and the isolated OUT+ and OUT– lines for BTL
operation requirements exist. Inserting a plug into the EVM headphone jack
switches the EVM to the headphone mode and shuts down the class-D
amplifier section. Figure 3–3 shows the connections that are required for
operation (with the exception of the fault monitor circuit, which is optional). The
discussion in this section is in reference to this figure unless otherwise noted.

Figure 3–3.TPA032D03 Class-D EVM Stand-Alone Connections for Mono BTL Output

5 V

Headphone

Output Jack

Right HP

Input

Audio

Line

Inputs

Left HP

Input

Fault

Monitor

Mode

LED 1

R

R

LED 0

C19 C20

SLOP310 TPA032D03 EVM Board

RHP

GND –IN+ GND

R1
Mode LHP

R3

J1

R12

C1

R4

R5

C3
C4

R2
C2

C5

SD

S1

Mute

S2

R6

R11

TP3

TP2

C12

+

R14

C11

R13

C17

U1

C18

TP1

VDD

C16

GND

R9R8R7
R10

GND

12 V

VCC

L1

VCC

2000

Instruments

Texas

L2

Mute

SD

OUT–

OUT+

Mute

Shutdown

Note: Capacitor C1 1 is optional (not assembled) and a location for it on the EVM PCB has been provided to increase design

flexibility and allow decoupling capacitance to be added.

3.7.1 Power Connections

Power must be connected to both the VCC and VDD module pins. Power
supply ground can be connected to any module ground pin, although best
results are achieved if power supply grounds are connected to the pins
adjacent to the VCC and VDD module pins. The ground and power wires
should be twisted to reduce inductance and noise pickup if they are long.

5 V

Details

3-7

Using The TPA032D03 Class-D EVM Stand-Alone

3.7.2 Input Connections

The class-D amplifier input signals can be connected in either of two ways:
differential or single-ended. For differential operation, connect the signal
source to the positive and negative inputs (IN+ and IN– module pins). For
single-ended operation, the input signal line should be connected to the IN+
module pin and the signal source ground wire should be connected to the
IN– module pin.

The EVM headphone amplifier inputs are single-ended, and the signal source
should be connected to the RHP and LHP module pins. For best results, the
ground of the signal source should be connected to the module GND pins at
the EVM headphone inputs to provide a return path for the current.

The input signal and ground wires should be twisted to reduce inductance and
noise pickup if the lead lengths are long and the cable is not shielded.

3.7.3 Output Connections

The speaker should be connected between the OUT+ and the OUT– module
pins. Inserting a plug into the EVM headphone jack switches the EVM to the
headphone mode and shuts down the class-D amplifier section.

3.7.4 Controls and Indicators

The mute, mode, and shutdown functions may be controlled externally via the
module Mute, Mode, and SD pins. An active-low input to the module Mute pin
mutes the selected amplifier. An active-low input to the module Mode pin
switches the EVM to the class-D mode and shuts off the headphone amplifier .
An active-low input to the module SD pin shuts down the device. A signal of
2 V or higher, allows normal operation.

Note that the mute, mode, and shutdown signals applied to the EVM control
input pins must be able to supply enough current to overcome the pullup
resistor on the module (100 kΩ).

The fault indicator circuit can be monitored at FAULT0 (TP1) and FAULT1
(TP2). These are open-drain outputs with 100-kΩ resistors connected to VDD
(5 V). A fault table is shown in Section 3.2.1 and in the device data sheet.

3-8

Details

3.8 TPA032D03 Class-D EVM Bill of Materials

The components in the bill of materials (Table 3–4) were selected for their
common values, availability, and the smallest size available to meet these
criteria.

Table 3–4.TPA032D03 Class-D EVM Bill of Materials

TPA032D03 Class-D EVM Bill of Materials

Reference Description Size

C1, C2, C15 Capacitor, Ceramic Chip, 0.1 µF, ±10%,

50 V, X7R

C3, C4, C7, C8,
C9, C12, C13,
C23

C16 Capacitor, Ceramic Chip, 0.047 µF, ±10%,

C17, C18 Capacitor, Ceramic Chip, 5.6 pF, ±5%,

C5, C6 Capacitor, Ceramic Chip, 1 nF, ±5%,

C10 Capacitor, Ceramic Chip, 10 µF, +80%–20%,

C19, C20 Capacitor, Aluminum Electrolytic, Radial Lead,

C21, C22 Capacitor, Ceramic Chip, 0.22 µF, ±10%,

†

C11

L1, L2 Inductor, SMT, 15 µH, ±20%, 2.2 ADC, 47.2 mΩ

R1 – R7, R10 Resistor, Thick Film Chip, SMD, 100 kΩ, ±5%,

R8, R9 Resistor, Thick Film Chip, SMD, 1 kΩ, ±5%, 1/10

R13 Resistor, Thick Film Chip, SMD, 500 kΩ, ±5%,

R14 Resistor, Thick Film Chip, SMD, 150 kΩ, ±5%,

TP1 – TP3 Test Points, Red 3 Farnell

J1 Mini Phone Jack, 3.5 mm, N/C, Stereo 0.512” × 0.472” 1 Mouser 161–3504

S1, S2 Switch, Momentary, Push Button, 12 VDC,

U1 IC, Audio Amplifier, Class-D,

Capacitor, Ceramic Chip, 1 µF, ±10%,
25 V, X7R

50 V, X7R

50 V, C0G,

50 V, C0G,

25 V, Y5V

33 µF, ±20%, 35 V, FC Series, 80 mΩ @ 100
kHz, 175 ma Ripple, –55°C to +105°C

50 V, X7R
Not assembled 0.492” ×

@ 1 kHz, –20 to +90°C

1/10 W, 100 V, –50 to 150°C, ±200 ppm/°C

W, 100 V, –50 to 150°C, ±200 ppm/°C

1/10 W, 100 V, –50 to 150°C, ±200 ppm/°C

1/10 W, 100 V, –50 to 150°C, ±200 ppm/°C

Header Pins, Gold, Single, 0.5” Long, 0.25”
Wide, 0.100” centers

50 mA

10 W, 48 pin, DCA pkg

0805 3 Kemet

1206 8 Kemet

0805 1 Kemet

0603 2 Kemet

0805 2 Kemet

1210 1 muRata

0.197” ×

0.0197” ×

0.078”
1206 2 Kemet

0.0236” ×

0.197”

0.398” × 0.398”
× 0.236”

0603 8 Vishay/Dale

0603 2 Vishay/Dale

0603 1 Vishay/Dale

0603 1 Vishay/Dale

0.5”, 0.25”,

0.1”

0.291” × 0.138”
× 0.134”

TSSOP48 1 TI

EVM

Qty.

2 Panasonic

1

2 TDK

16 Samtec

2 Panasonic

Manufacturer/

Part Number

C0805C104J5RAC

C1206C105K3RAC

C0805V473K5RAC

C0603C569J5GAC

C0805C102J5GAC

GRM235Y5V106Z25

EEUFC1V333

C1206C224K5RAC

SLF10145T–150M2R2

CRCW0603104J

CRCW0603101J

CRCW0603504J

CRCW0603154J

240–345

TSW–19–8–G–S

EVQ-PJS04K

TPA032D03DCA

†

Capacitor C11 is optional (not assembled) and a location for it on the EVM PCB has been provided to increase design flexibility
and allow decoupling capacitance to be added.

Details

3-9

TPA032D03 Class-D EVM Schematic

3.9 TPA032D03 Class-D EVM Schematic

The TPA032D03 class-D EVM schematic is shown in Figure 3–4.

Figure 3–4.TPA032D03 Class-D EVM Schematic Diagram

VDD

SD
Mute

Mode

LIN–
LIN+

VCC

LOUT+

LOUT–

TIP

LHP

VCC

C11

R3
100k

R1
100k

C10

†

10µF

C23

1µF

C20

R2 100k

C2 0.1µF

33µF

R5
100k

S2
Mute

C9

1µF

C22

0.22µF
C21

0.22µF

5.6 pF

C13
1µF

C18

C3
C4
C6

C7

L1

15µH

15µH

R10
100k

C15

0.1µF

S1
SD

L2

R6
100k

1µF
1µF
1000pF

1µF

1

SHUTDOWN

2

MUTE

3

MODE

4

INN

5

INP

6

COMP

7

AGND

8

VDD

9

PVDD

10

OUTP

11

OUTP

12

PGND

13

PGND

14

OUTN

15

OUTN

16

PVDD

17

HPREG

18

HPLOUT

19

HPLIN

20

AGND

21

PVDD

22

VCP

23

HPDL

24

CP1

TPA032D03

FAULT_0
FAULT_1

HPVCC

HPROUT

0.047µF

C16

COSC
AGND
AGND
AGND
AGND
AGND

PVDD

NC

NC
PGND
PGND

NC

NC

PVDD

HPRIN

V2P5

PVDD
PGND
HPDR

CP2

48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25

TP3
TP2

Ring

C5

1000pF

TP1

C11

1µF

R8

1k

C12

1µF

TIP

R7
100k

Mode

R9

1k

C8
1µF

5.6 pF

R13
500k

R14
150k

C18

VDD
VCC

C19 33µF

R4

100k

3
B
A

2

1

C1

0.1µF

J1

5 V
12 V

VCC

VDD

RING

RHP

†

Capacitor C11 is optional (not assembled) and a location for it on the EVM PCB has been provided to increase design flexibility
and allow decoupling capacitance to be added.

3-10

Details

3.10 TPA032D03 Class-D EVM PCB Layers

The following illustrations depict the TP A032D03 class-D EVM PCB assembly
and layers. These drawings are not to scale. Gerber plots can be obtained from
any TI Sales Office.

Figure 3–5.TPA032D03 Class-D EVM Top Assembly

TPA032D03 Class-D EVM PCB Layers

Figure 3–6.TPA032D03 Class-D EVM Bottom Assembly

Details

3-11

TPA032D03 Class-D EVM PCB Layers

Figure 3–7.TPA032D03 Class-D EVM Top Layer

Figure 3–8.TPA032D03 Class-D EVM Second Layer

3-12

Details

Figure 3–9.TPA032D03 Class-D EVM Third Layer

TPA032D03 Class-D EVM PCB Layers

Figure 3–10. TPA032D03 Class-D EVM Bottom Layer

Details

3-13

3-14

Details