Texas Instruments TPA032D01 User manual

TPA032D01 Mono ClassĆD
Audio Power Amplifier
Evaluation Module
May 2000 Mixed-Signal Products
User’s Guide
SLOU065

IMPORTANT NOTICE
TexasInstruments andits subsidiaries(TI) reservethe rightto makechanges totheir productsor todiscontinue
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
TIdeemsnecessarytosupport thiswarranty. Specifictestingofallparameters ofeachdevice isnotnecessarily
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.
TIassumes noliabilityforapplicationsassistance orcustomer productdesign. TIdoes notwarrantorrepresent
thatanylicense,eitherexpressorimplied,isgrantedunderanypatentright,copyright,maskworkright,orother
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

iii
Chapter Title—Attribute Reference
Preface
Related Documentation From Texas Instruments
J TIPlug-N-PlayAudioAmplifierEvaluationPlatform (TILiterature
Number SLOU011) provides detailed information on the evaluation
platform and its use with TI audio evaluation modules.
J TPA032D01 Mono Class-D Audio Power Amplifier (TI Literature
Number SLOS282) This is the data sheet for the TPA032D01
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.
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
Jofpart 15ofFCCrules,which aredesignedtoprovidereasonableprotection
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.

iv

Running Title—Attribute Reference
v
Chapter Title—Attribute Reference
Contents
1 Introduction 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1 Feature Highlights 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 Description 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 TPA032D01 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 TPA032D01 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 TPA032D01 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 TPA032D01 Class-D EVM Bill of Materials 3-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.9 TPA032D01 Class-D EVM Schematic 3-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.10 TPA032D01 Class-D EVM PCB Layers 3-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Running Title—Attribute Reference
vi
Figures
1–1 The TI TPA032D01 Mono Class-D Audio Power Amplifier EVM—Top View 1-3. . . . . . . . . . .
1–2 The TI TPA032D01 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 TPA032D01 Class-D EVM Stand-Alone Connections for Mono BTL Output 3-7. . . . . . . . . . .
3–4 TPA032D01 Class-D EVM Schematic Diagram. 3-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–5 TPA032D01 Class-D EVM Top Assembly. 3-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–6 TPA032D01 Class-D EVM Bottom Assembly 3-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–7 TPA032D01 Class-D EVM Top Layer 3-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–8 TPA032D01 Class-D EVM Second Layer. 3-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–9 TPA032D01 Class-D EVM Third Layer. 3-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–10 TPA032D01 Class-D EVM Bottom Layer. 3-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tables
2–1 Typical TI Plug-N-Play Platform Jumper and Switch Settings for the
TPA032D01 Class-D EVM 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–2 Platform Jumper and Switch Settings for the TPA032D01 2-3. . . . . . . . . . . . . . . . . . . . . . . . . .
3–1 Platform Jumper and Switch Settings for the TPA032D01 EVM Power Inputs 3-3. . . . . . . . .
3–2 TPA032D01 Class-D EVM Fault Indicator Table 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–3 TPA032D01 Class-D EVM Test Points 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–4 TPA032D01 Class-D EVM Bill of Materials 3-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1
Introduction
Introduction
This chapter provides an overview of the Texas Instruments (TI) TPA032D01
mono class-D audio power amplifier evaluation module (SLOP309). It
includesalistofEVMfeatures,abriefdescriptionofthemoduleillustratedwith
a pictorial diagram, and a list of EVM specifications.
Topic Page
1.1 Feature Highlights 1–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 Description 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 TPA032D01 Class-D EVM Specifications 1–4. . . . . . . . . . . . . . . . . . . . . . . .
Chapter 1

Feature Highlights
1-2
Introduction
1.1 Feature Highlights
The TI TPA032D01 mono class-D audio power amplifier evaluation module
andtheTIplug-n-playaudioamplifierevaluationplatformincludethefollowing
features:
- TPA032D01 mono class-D audio power amplifier evaluation module
J Internal depop circuitry to greatly reduce turnon transients in outputs
J Single channel, bridge-tied load (BTL) only operation
J 12-V operation
J 10 W BTL output into 4 Ωat 12 V
J Low current consumption in shutdown/mute mode (97 µA/2.5 mA)
J Internal gain set to 25 dB
J IC shutdown and mute control inputs—TTL logic level
J High efficiency
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 Platformprovides quick andeasyaudioinput and outputconnections
- 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 Miniature mono phone jack input
J Left and right RCA phono jack outputs
J Left and right compression speaker terminal outputs
J Miniature stereo headphone jack output

Description
1-3
Introduction
1.2 Description
The TPA032D01 mono class-D audio power amplifier evaluation module is a
complete, 10-W mono audio power amplifier. It consists of the TI TPA032D01
mono class-D audio power amplifier IC along with a small number of other
partsmountedonacircuitboardthatmeasuresapproximately2-1/4inchesby
1-3/4 inches (Figure 1–1 and 1–2).
Figure 1–1.The TI TPA032D01 Mono Class-D Audio Power Amplifier EVM— Top View
U1
C9
R2
R1
SD
Mute
OUT+
OUT–
GND
VDD SLOP309 TPA032D01 EVM Board
R3
GND –IN+ GND
S1
Mute
S2
SD
C14
L4
L2
TP4
TP2
TP3
TP1
+
VCC
R5
C1
R6
L1
R4
C3
GND
VDD VCC
Texas
2000
Instruments
C2
Note: Capacitor C9 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 TPA032D01 Mono Class-D Audio Power Amplifier EVM— Bottom View
C10
C15
C11
C5
C4
C12
C6
C17
C16
C7 C8
C13

TPA032D01 Class-D EVM Specifications
1-4
Introduction
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.
TheplatformhasroomforasingleTPA032D01class-Devaluationmoduleand
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,
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.
1.3 TPA032D01 Class-D EVM Specifications
AllmeasurementsmadewithVDD=12VandRL=4Ω,unlessotherwisenoted.
1.3.1 Maximum
Supply voltage range, VDD 9 V to 14 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supply current, IDD 4.6 A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous output power per channel, BTL, PO10 W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Audio input voltage, VI(AV= 25 dB) 350 mVrms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3.2 Typical
Supply current, no input, IDD 55 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supply current, EVM mute, IDD 2.5 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supply current, EVM shutdown, IDD 97 µA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gain 25 dB. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total harmonic distortion + noise, PO= 1 W @ 1 kHz 0.14 %. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-1
Quick Start
Quick Start
Follow the steps in this chapter to quickly prepare the TPA032D01 mono
class-DaudioamplifierEVMfor use.UsingtheTPA032D01class-DEVMwith
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.
Theplatformswitchand jumper settings shown inTable2–1aretypicalforthe
TPA032D01 class-D EVM. There are no jumpers or switches to set on
the TPA032D01 class-D EVM board, itself.
Table 2–1. Typical TI Plug-N-Play Platform Jumper and Switch Settings for the
TPA032D01 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 NOT Installed, X = Don’t care
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.
Topic Page
2.1 Precautions 2–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 Quick Start List for Platform 2–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3 Quick Start List for Stand-Alone 2–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 2

Precautions
2-2
Quick Start
2.1 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 2–1. Quick Start Platform Map
Signal Conditioning
****CAUTION****
Do not insert or remove
EVM boards with power
applied
ICC
JP4
F1
VR1
R1
JP3
JP2 JP1 AC/DC
(J2)
VCC(J1)
D1 D2 D3
D4 J2
J3 J4 J5
AC/DC
In
VCC
In
+
J1
DC
SOURCE
LED1 VCC
LED2 VDD
R2
JP5 IDD
B1
U6
POWER
SUPPLY
U3 U4
U5
U1
U2
Audio
Power
Amps
OnOff ConditioningS2
J7 J8 Right
Out Left
Out
+– +–
JP6
Mode
Mute
Spk(U2-U4)
JP8
J9 Left
Out
JP7
S3 HP Source
U2-U4
U5
Polarity
Lo
Hi
HP(U5)
C3 C2
++
R3
R5
J10
Stereo
HP Out
TP1
GND
Plug-N-PlayAudio Amplifier
Evaluation Platform
SLOP097 Rev. C.1
Stereo
In
Right
In Left
In
J6 In/Out VDD
F2
VR2 +
DC
Power
In/Out
Speaker
Output
Headphone
Output
Audio
Input
Power
Input
Batt
C1+
Right
Out
On Off Pwr
S1
TEXAS INSTRUMENTS 1997
R4
1
16
17 14
2
5
4 6
7
13
12
3
119 108

Quick Start List for Platform
2-3
Quick Start
2.2 Quick Start List for Platform
Follow these steps when using the TPA032D01 class-D EVM with the TI
plug-n-playaudioamplifierevaluationplatform(seetheplatformuser’sguide,
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) InstallaTPA032D01moduleinplatformsocketU2,takingcaretoalignthe
module pins correctly (EVM power pins engage sockets U2 and U3).
3) Set switch S2 to OFF .
4) Set switch S3 to
U5 .
5) Set jumper JP6 to select the
Mute control input.
6) Set control signal Polarity jumper JP8 to
Lo.
Table 2–2. Platform Jumper and Switch Settings for the TPA032D01
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 NOT Installed, X = Don’t care
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.
- Power supply
7) Connect a 12-V regulated power supply (ensure power supply is set to
OFF ) 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-Ωspeakers to left and right RCA jacks J7 and J9 or to
stripped wire speaker connectors J8.
- Power up
15) Verify correct voltage and input polarity and setthe external powersupply
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 List for Stand-Alone
2-4
Quick Start
2.3 Quick Start List for Stand-Alone
Follow these steps to use the TPA032D01 class-D EVM stand-alone or to
connect it into existing circuits or equipment. Connections to the TPA032D01
module header pins can be made via individual sockets, wire-wrapping, or
solderingtothepins,eitheronthetoporthebottomofthemodulecircuitboard.
- 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) Connectanexternalregulatedpowersupply set to5Vtothemodule VDD
pin taking care to observe marked polarity.
- Inputs and outputs
4) Ensure that audio signal source level adjustments are set to minimum.
5) ConnecttheaudiosourceacrossthemoduleIN+andIN–pinsforclass-D
operation,takingcaretoobservemarkedpolarity.For single-ended input,
thenegativeinputpin(IN–)shouldbeconnectedtothegroundoftheaudio
signal source.
6) ConnectacontrolsignaltothemoduleMute 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(tiedtoground)toshutdowntheTPA032D01amplifierIContheEVM.
NotethatthecontrolsignalsappliedtotheEVMMuteandSDinputsmusthave
sufficient current capability to overcome the 100-kΩpullup resistor on each
input.MiniaturepushbuttonswitchesontheEVMallowmanualshutdown(S2)
and manual muting (S1) of the amplifier.
8) Connecta 4-Ω– 8-Ωspeakerto the module OUT+ andOUT– pins,taking
care to observe marked polarity.
- Power up
9) Verify correct voltage and input polarity and setthe external powersupply
to ON.
The EVM should begin operation.
10) Adjust the signal source level as needed.

3-1
Details
Details
ThischapterprovidesdetailsontheTPA032D01ICevaluationmodule,aparts
list for the TPA032D01 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 TPA032D01 Class-D EVM Test Points 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6 Module Switches 3-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.7 Using the TPA032D01 Class-D EVM Stand-Alone 3-7. . . . . . . . . . . . . . . .
3.8 TPA032D01 Bill of Materials 3-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.9 TPA032D01 Class-D EVM Schematic 3-10. . . . . . . . . . . . . . . . . . . . . . . . . . .
3.10 TPA032D01 Class-D EVM PCB Layers 3-11. . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 3

Precautions
3-2
Details
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
Signal Conditioning
****CAUTION****
Do not insert or remove
EVM boards with power
applied
ICC
JP4
F1
VR1
R1
JP3
JP2 JP1 AC/DC
(J2)
VCC(J1)
D1 D2 D3
D4 J2
J3 J4 J5
AC/DC
In
VCC
In
+
J1
DC
SOURCE
LED1 VCC
LED2 VDD
R2
JP5 IDD
B1
U6
POWER
SUPPLY
U3 U4
U5
U1
U2
Audio
Power
Amps
OnOff ConditioningS2
J7 J8 Right
Out Left
Out
+– +–
JP6
Mode
Mute
Spk(U2-U4)
JP8
J9 Left
Out
JP7
S3 HP Source
U2-U4
U5
Polarity
Lo
Hi
HP(U5)
C3 C2
++
R3
R5
J10
Stereo
HP Out
TP1
GND
Plug-N-PlayAudio Amplifier
Evaluation Platform
SLOP097 Rev. C.1
Stereo
In
Right
In Left
In
J6 In/Out VDD
F2
VR2 +
DC
Power
In/Out
Speaker
Output
Headphone
Output
Audio
Input
Power
Input
Batt
C1+
Right
Out
On Off Pwr
S1
TEXAS INSTRUMENTS 1997
R4

Plug-N-Play Platform Power Requirements and Connections
3-3
Details
3.2 Plug-N-Play Platform Power Requirements and Connections
The TPA032D01 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 TPA032D01 class-D EVM. Table 3–1 shows the
platform jumper and switch settings for each power source option (see the
User’s Guide for the TI plug-n-play audio amplifier platform, TI Literature
Number SLOU011 for more information). The TPA032D01 class-D EVM
requires no setup for power source selection.
Table 3–1.Platform Jumper and Switch Settings for the TPA032D01 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 NOT Installed, X = Don’t care
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.
Although the TPA032D01 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.
A VDD supply of 5 V is required for normal operation of the TPA032D01 EVM.
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 VDD from the platform VCC supply.
Theplatformisequippedwithovervoltageandreverse-polaritysupplyvoltage
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 TPA032D01 amplifier IC installed on
the evaluation module (5.5 V) or damage to the IC may result. In no case
shouldVDDvoltageoftheincorrectpolarityorinexcessof6.0Vbeapplied
toscrewterminalsJ6 of theplatform,orthepowerprotectioncircuit onthe
VDD line will trip.
- VCC voltage applied to the platform MUST NOT exceed the maximum
voltageinputspecifiedforthevoltage regulator module installed in socket
U6 (12 V for the SLVP097), or damage to the voltage regulator module
may result. In no case should VCC voltage applied to the platform exceed
15 V, or the overvoltage protection circuit on the VCC bus will trip.

Plug-N-Play Platform Inputs and Outputs
3-4
Details
3.3 Plug-N-Play Platform Inputs and Outputs
TheTIplug-n-playaudioamplifierevaluationplatformisequippedwithseveral
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 left and right RCA
phono jacks (J7 and J9), left and right pairs of compression connectors for
stripped speaker wires (J8), and optionally, through a miniature (1/8″) mono
phone jack (J10), for headphones.
The audio output lines from the power amplifiers are separate all the way to
the edge of the platform (output jacks J7, J8, and J9)—the OUT– lines from
the power amplifier sockets are not tied to each other or to platform ground.
This allows the TPA032D01 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

Plug-N-Play Platform Inputs and Outputs
3-5
Details
3.4 Control and Indicator Circuits
Two main control circuits are provided with the TPA032D01. The mute circuit
grounds the output of the active 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,
over-current, 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 TPA032D01 amplifier IC (IC pins 40 and 41) that provide
feedback when a fault condition exists. Signals on these pins provide the
status of the class-D amplifier: operational, over-current, thermal fault, and
under-voltage lockout. Table 3–2 lists the possible output conditions of these
pins and a description of the fault indicated.
Table 3–2.TPA032D01 Class-D EVM Fault Indicator Table
FAULT 0
(TP 1) FAULT 1 (TP 2) DESCRIPTION
1 1 No fault. The device is operating normally.
1 0 Charge pump under-voltage lockout (VCP-UV) fault. The charge pump voltage is < (PVDD + 6V).
Alllow-side transistorsareturnedon,shorting theloadtoground.Normal operationresumeswhen
the charge pump voltage is restored (not a latched fault), however the Fault
indication remains
active until cleared by cycling MUTE, SHUTDOWN, or the power supply.
0 1 Over-current fault. The output current limit has been exceeded. All output transistors are switched
off, causing the load to see a high impedance state. This is a
latched fault and isclearedby cycling
MUTE, SHUTDOWN, or the power supply.
0 0 Thermalfault.Theinternaljunctiontemperaturehasexceeded125°C.Allofthelow-sidetransistors
are turned on, shorting the load to ground. Once the junction temperature drops by 20°C and is
below 125°C, normal operation resumes (not a latched fault). The Fault
indication remains active
until cleared by cycling MUTE, SHUTDOWN, or the power supply.
3.5 TPA032D01 Class-D EVM Test Points
Test points have been included on the TPA032D01 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.TPA032D01 Class-D EVM Test Points
TEST
POINT IC PIN or EVM FUNCTION FUNCTION
1 FAULT_0 LSB for logic-level fault output signal, open drain
2 FAULT_1 MSB for logic-level fault output signal, open drain
3 VCCREG Onboard 5-V supply
4 VCP Charge pump storage capacitor

Plug-N-Play Platform Inputs and Outputs
3-6
Details
3.6 Module Switches
TheTPA032D01monoclass-Daudioamplifierevaluationmoduleisequipped
with two pushbutton switches that allow the module shutdown and mute
functions to be manually activated.
3.6.1 S1 — Shutdown
To have the module amplifier IC enter the shutdown mode, press the
Shutdown switch (S2) on the module. S2 connects the amplifier IC
SHUTDOWNpintoground, forcing it into a low-power state. This function can
be controlled by an external control input to the SD module pin.
TheshutdownmodereducestheamplifierICcurrentconsumptiontolessthan
1 µA compared to approximately 2.5 mA in the mute mode. The EVM
shutdown current is based on VCC, VDD, R2, R5, and R6, and capacitor
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
PushbuttonswitchS1ontheTPA032D01 class-D EVMallowsmanualmuting
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.