Texas Instruments TPA6100A2 User manual

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  
 
2000 Mixed-Signal Products
User’s Guide
SLOU084

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

Information About Cautions and Warnings
iii
Read This First
Preface
Read This First
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.
 TPA6100A2 50-mW Stereo Audio Power Amplifier (literature
number SLOS269) This is the data sheet for the TPA6100A2 audio
amplifier integrated circuit.

Running Title—Attribute Reference
iv
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.

Running Title—Attribute Reference
v
Chapter Title—Attribute Reference
Contents
1 Introduction 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1 Features 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 Description 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 TPA6100A2 EVM Specifications 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4 Reference 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4.1 TPA6100A2 Filterless Class-D EVM Schematic 2-5. . . . . . . . . . . . . . . . . . . . . . . . . .
2.4.2 TPA6100A2 Audio Power Amplifier Evaluation Module Parts List 2-6. . . . . . . . . .
2.4.3 TPA6100A2 EVM PCB Layers 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Running Title—Attribute Reference
vi
Figures
1–1 The TI TPA6100A2 Audio Amplifier Evaluation Module 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–1 Quick Start Platform Map 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–2 Quick Start Module Map 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–3 TPA6100A2 Class-D EVM Schematic Diagram 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–4 TPA6100A2 EVM Top Layer 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–5 TPA6100A2 EVM Bottom Layer 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tables
2–1 Typical TI Plug-N-Play Platform Jumper and Switch Settings for the
TPA6100A2 EVM 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–2 TPA6100A2 EVM Parts List 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1
Introduction
Introduction
This chapter provides an overview of the Texas Instruments (TI) TPA6100A2
audio amplifier evaluation module (SLOP335). 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 Features 1–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 Description 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 TPA6100A2 EVM Specifications 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 1

Features
1-2
Introduction
1.1 Features
The TI TPA6100A2 audio amplifier evaluation module and the TI Plug-N-Play
audio amplifier evaluation platform include the following features:
TPA6100A2 Stereo Audio Power Amplifier Evaluation Module
1.6-V to 3.6-V operation
Dual channel, single-ended operation
50-mW output power into 16 Ωat 3.3 V
Verylowdistortion—THD+Nislessthan0.04%at1kHzandlessthan
0.2% from 20 Hz to 20 kHz into 16-Ωloads, and less than 0.03% at 1
kHz and less than 0.2% from 20 Hz to 20 kHz into 32-Ωloads
Extremely low current consumption in shutdown mode
Internal thermal and short-circuit protection
Internal pop reduction circuitry
Quick and Easy Configuration With the TI Plug-N-Play Audio Amplifier
Evaluation Platform
Evaluation module is designed to simply plug into the platform,
automatically making all signal, control, and power connections
Platform provides flexible power options
Jumpers on the platform select power and module control options
Switches on the platform route signals
Platformprovides quick andeasyaudioinput and outputconnections
Platform Power Options
Onboard 9-V battery
External 5-V – 15-V (VCC) supply inputs
External regulated VDD supply input
Socket for onboard 5-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 TPA6100A2 audio power amplifier evaluation module is a complete,
low-power stereo audio power amplifier for high-fidelity line-level output,
headphone, and small speaker applications. It consists of the TI TPA6100A2
50-mW stereo 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 TPA6100A2 Audio Amplifier Evaluation Module
†Due to the very small size of the MSOP IC package, the standard part number TPA6100A2 is
replaced with the code TIAJL.
Single in-line header pins are mounted to the underside of the module circuit
board to allow the EVM to be plugged into the TI plug-n-play audio amplifier
evaluationplatform,ortobewired directlyintoexistingcircuitsandequipment
when used stand-alone.
The platform has room for a single TPA6100A2 evaluation module and is a
convenient vehicle for demonstrating TI’s audio power amplifier and related
evaluation modules. The EVMs simply plug into the platform, which
automatically provides power to the modules, interconnects them correctly,
andconnectsthemtoaversatilearrayofstandardaudioinputandoutputjacks
and connectors. Easy-to-use configuration controls allow the platform and
EVMs to quickly model many possible end-equipment configurations.
There is nothing to build, nothing to solder, and nothing but the speakers
included with the platform to hook up.
1.3 TPA6100A2 EVM Specifications
Supply voltage range, VDD 1.6 V to 3.6 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supply current, IDD 160 mA, max. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous output power, PO: 16 Ω, VDD = 3.3 V 50 mW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Audio input voltage, VIVDD + 0.3 Vpp, max. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Minimum load impedance, RL16 Ω. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-4
Introduction

2-1
Quick Start
Quick Start
The steps in this chapter can be followed to prepare the TPA6100A2 audio
amplifier EVM for use. Using the TPA6100A2 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.
Theplatformswitchand jumper settings shown inTable2–1aretypicalforthe
TPA6100A2 EVM and will cause the TPA6100A2 IC to shutdown/mute when
a plug is removed from platform headphone jack J10.
Table 2–1. Typical TI Plug-N-Play Platform Jumper and Switch Settings for the
TPA6100A2 EVM
EVM JP6 JP7 JP8 S2 S3
TPA6100A2 X Lo X See Note 2 U5
Notes: 1) X = Don’t care
2) SetS2to ON when signalconditioningboardis installed in U1;setS2
to OFF when no signal conditioning board is installed.
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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4 Reference 2–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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
3
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
R4 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
110
9
8
6b
6b
6a
6b
4
7b
25

Quick Start List for Platform
2-3
Quick Start
2.2 Quick Start List for Platform
Follow these steps when using the TPA6100A2 EVM with the TI plug-n-play
audio amplifier evaluation platform (see the platform user’s guide, literature
number SLOU011, for additional details). Numbered callouts for selected
steps are shown in Figure 2–1.
Platform preparations
1) Ensurethatallexternalpowersourcesaresetto OFF andthattheplatform
power switch S1 is set to
OFF.
2) InstallaTPA6100A2moduleinplatformsocketU5,takingcaretoalignthe
module pins correctly.
3) Use switch S2 to select or bypass the signal conditioning EVM (U1).
4) Set control signal polarity jumper JP7 to Lo.
5) SetHpsourceswitchS3toU5toroute theoutputsignaltothe headphone
Jack (J10).
Power supply
6) Select and connect the power supply:
a) Connectanexternalregulatedpowersupplysettoavoltagebetween
1.6Vand 3.6VtoplatformVDD powerinputconnectorJ6,takingcare
to observe marked polarity,
or
b) Install a 3-V to 5-V voltage regulator EVM (SLVP097 or equiv.) in
platformsocketU6.Installa9-VbatteryinB1orconnecta7-Vto12-V
power source to a platform VCC power input J1 or J2 and jumper the
appropriate power input (see platform user’s guide). Set jumper JP1
on the SLVP097 to 3.3-V operation.
Inputs and outputs
7) Ensurethat signal sourcelevel is set to minimum and that potentiometers
R1 and R4 are set to the midpoint.
8) Connect the audio source to left and right RCA phono jacks J3 and J5 or
stereo miniature phone jack J4.
9) Connect 16-Ωto 32-Ωheadphones to headphone jack J10.
Power-up
10) Verify correct voltage and input polarity and setthe external powersupply
to ON. IfVCC and anonboardregulatorEVMareused toprovideVDD,set
platform power switch S1 to
ON.
PlatformLED2shouldlightindicatingthepresenceofVDD,andtheevaluation
modules installed on the platform should begin operation.
11) Adjust the signal source level and potentiometers R1 and R4 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 TPA6100A2 EVM stand-alone or when
connecting it into existing circuits or equipment. Connections to the
TPA6100A2 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. Numbered callouts for selected steps are shown in
Figure 2–2.
Figure 2–2. Quick Start Module Map
6
2
4
4
5
6
†Due to the very small size of the MSOP IC package, the standard part number TPA6100A2 is
replaced with the code TIAJL.
Power supply
1) Ensure that all external power sources are set to OFF .
2) Connect an external regulated power supply set between 1.6 V and 3.3 V
to the module VDD and GND pins taking care to observe marked polarity.
Inputs and outputs
3) Ensurethat signal sourcelevel is set to minimum and that potentiometers
R1 and R4 are set to the midpoint.
4) Connect the audio source to the module IN1, IN2, and GND pins taking
care to observe marked polarity.
5) Connect the shutdown pin to VDD through a normally open switch.
6) Connect 32-Ωheadphones to the module VO1 and VO2 pins through
33-µF to 1000-µF output-coupling capacitors (see Figure 3–8) and return
to the GND pin, or
7) For line output, connections to the VO1 and VO2 pins must be made
through 33-µF to 1000-µF output-coupling capacitors and returned to
GND.
Power-up
8) Verify correct voltage and input polarity and setthe external powersupply
to ON.
The EVM should begin operation.
9) Adjust the signal source level and potentiometers R1 and R4 as needed.

TPA6100A2 EVM Schematic
2-5
Quick Start
2.4 Reference
2.4.1 TPA6100A2 EVM Schematic
The TPA6100A2 EVM schematic is shown in Figure 2–3.
Figure 2–3.TPA6100A2 EVM Schematic Diagram
IN1–
Vo1
VDD
Vo2
BYPASS
GND
SHUTDOWN
IN2–
C3
1 µF
R1
100 kΩ
C1
0.1 µF
R8
100 kΩ
8
7
6
5
1
2
3
4
ROUT
LOUT
RIN
R7
100 kΩ
TPA6100A2
C5
10 µF
+VDD
C4
0.1 µF
S1
SHUTDOWN
R2
10 kΩ
R3
100 kΩ
R4
100 kΩ
C2
0.1 µF
LIN
R5
10 kΩ
R6
100 kΩR9
100 kΩ

TPA6100A2 Audio Power Amplifier Evaluation Module Parts List
2-6
Quick Start
2.4.2 TPA6100A2 Audio Power Amplifier Evaluation Module Parts List
Table 2–2.TPA6100A2 EVM Parts List
Ref. Description Size Qty. Manufacturer/
Part Number Vendor/Number
C1, C2 Capacitor, 0.47 µF, ±10%,
Nonpolarized, SMD 0603 1 Panasonic ECJ–1VB0J474K Digi-Key PCS1911CT-ND
C4 Capacitor, 0.1 µF, ±10%,
Nonpolarized, SMD 0603 1 Murat GRM39X7R104K16 Arrow GRM39X7R104K16
C3 Capacitor, 1 µF, ±10%,
Nonpolarized, SMD 0603 1 Murata GRM39Y5V106Z010 Arrow GRM39Y5V106Z010
C5 Capacitor, 10 µF, 6.3 V,
SMD A 1 Panasonic ECS–TOJY106R Digi-Key PCS1106CT-ND
R2, R5 Resistor, 10 kΩ, 1/16 W,
5%, SMD 0603 2 Panasonic ERJ-3GSYJ103 Digi-Key P10KGTR-ND
R3, R6,
R7, R8,
R9
Resistor, 100 kΩ, 1/16 W,
5%, SMD 0603 4 Panasonic ERJ-3GSYJ104 Digi-Key P100KGTR-ND
R1, R4 Potentiometer, 100 kΩ, 1/2
W, 20%, thru hole 2 Bourns 3314J–1–104E Digi-Key 3314J–104ETR–ND
S1
(SHUT-
DOWN)
Switch, momentary, SMD 1 Panasonic
P8048SCT-ND Digi-Key P8048SCT-ND
U1 IC, TPA6100A2DGK APA,
50 mW, 2 channel MSOP-8 1 TI TPA6100A2DGK
PnP Pins Terminal post headers 11 Sullins Digi-Key
S1022-36-ND

TPA6100A2 EVM PCB Layers
2-7
Quick Start
2.4.3 TPA6100A2 EVM PCB Layers
Thefollowingillustrations depicttheTPA6100A2PCBlayers. Thesedrawings
are not to scale. Gerber plots can be obtained from any TI sales office.
Figure 2–4.TPA6100A2 EVM Top Layer
Figure 2–5.TPA6100A2 EVM Bottom Layer

2-8
Quick Start