Texas Instruments TPA3004D2EVM User manual

TPA3004D2EVM
12ĆW Stereo ClassĆD Audio Power Amplifier
Wit DC Volume Control
May 2003 HPL
User’s Guide
SLOU158A

IMPORTANT NOTICE
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any product or service without notice. Customers should obtain the latest relevant information before placing
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TI warrants performance of its hardware products to the specifications applicable at the time of sale in
accordance with TI’s standard warranty. Testing and other quality control techniques are used to the extent TI
deems necessary to support this warranty. Except where mandated by government requirements, testing of all
parameters of each product is not necessarily performed.
TI assumes no liability for applications assistance or customer product design. Customers are responsible for
their products and applications using TI components. To minimize the risks associated with customer products
and applications, customers should provide adequate design and operating safeguards.
TIdoesnotwarrantorrepresentthatanylicense, eitherexpress orimplied, isgranted underanyTIpatent right,
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inwhichTIproductsorservicesareused.InformationpublishedbyTIregardingthird–partyproductsorservices
does not constitute a license from TI to use such products or services or a warranty or endorsement thereof.
Use of such information may require a license from a third party under the patents or other intellectual property
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Reproduction of information in TI data books or data sheets is permissible only if reproduction is without
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Mailing Address:
Texas Instruments
Post Office Box 655303
Dallas, Texas 75265
Copyright 2003, Texas Instruments Incorporated

EVM IMPORTANT NOTICE
Texas Instruments (TI) provides the enclosed product(s) under the following conditions:
Thisevaluationkit being soldbyTI is intendedforusefor ENGINEERING DEVELOPMENT OR EVALUATION
PURPOSES ONLY and is not considered by TI to be fit for commercial use. As such, the goods being provided
may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective
considerations, including product safety measures typically found in the end product incorporating the goods.
As a prototype, this product does not fall within the scope of the European Union directive on electromagnetic
compatibility and therefore may not meet the technical requirements of the directive.
ShouldthisevaluationkitnotmeetthespecificationsindicatedintheEVMUser’sGuide,thekitmaybereturned
within 30 days from the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE
WARRANTY MADE BY SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED,
IMPLIED,ORSTATUTORY,INCLUDINGANYWARRANTY OFMERCHANTABILITY ORFITNESS FORANY
PARTICULAR PURPOSE.
The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user
indemnifies TI from all claims arising from the handling or use of the goods. Please be aware that the products
receivedmaynotberegulatorycompliant oragency certified (FCC,UL, CE,etc.). Dueto theopen construction
oftheproduct,itistheuser’sresponsibilitytotakeanyandallappropriateprecautionswithregardtoelectrostatic
discharge.
EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE, NEITHER PARTY SHALL BE LIABLE
TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.
TI currently deals with a variety of customers for products, and therefore our arrangement with the user is not
exclusive.
TI assumes no liability for applications assistance, customer product design, software performance, or
infringement of patents or services described herein.
Please read the EVM User’s Guide and, specifically, the EVM Warnings and Restrictions notice in the EVM
User’sGuidepriortohandlingtheproduct.Thisnoticecontainsimportantsafetyinformationabouttemperatures
and voltages. For further safety concerns, please contact the TI application engineer.
Persons handling the product must have electronics training and observe good laboratory practice standards.
No license is granted under any patent right or other intellectual property right of TI covering or relating to any
machine, process, or combination in which such TI products or services might be or are used.
Mailing Address:
Texas Instruments
Post Office Box 655303
Dallas, Texas 75265
Copyright 2003, Texas Instruments Incorporated

EVM WARNINGS AND RESTRICTIONS
It is important to operate this EVM within the supply voltage range specified in this user’s
guide.The supply voltage range should be 8.5 V to 18 V, and supply current (Icc)should be
no greater than 3 A maximum.
Operatingoutsidethespecifiedsupplyvoltagerangemaycauseunexpectedoperationand/or
irreversible damage to the EVM. If there are questions concerning the supply voltage and
current range, please contact a TI field representative prior to applying power to the device.
Applyingloadsoutsideofthespecifiedoutputrangemayresultinunintendedoperationand/or
possible permanent damage to the EVM. Please consult the EVM User’s Guide prior to
connecting any load to the EVM output. If there is uncertainty as to the load specification,
please contact a TI field representative.
Duringnormaloperation,somecircuitcomponentsmayhavecasetemperaturesgreaterthan
60°C.TheEVM isdesignedto operateproperlywith certain componentsabove 60°C aslong
astheinputandoutput rangesare maintained.Thesecomponentsincludebut arenot limited
tolinearregulators,switchingtransistors,passtransistors,andcurrentsenseresistors.These
typesof devicescanbeidentifiedusingtheEVM schematiclocated intheEVMUser’sGuide.
When placing measurement probes near these devices during operation, please be aware
that these devices may be very warm to the touch.
Mailing Address:
Texas Instruments
Post Office Box 655303
Dallas, Texas 75265
Copyright 2003, Texas Instruments Incorporated

Information About Cautions and Warnings
v
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.
FCC Warning
Thisequipmentisintendedforuseinalaboratorytestenvironmentonly.Itgen-
erates,uses,andcanradiateradiofrequencyenergyandhasnotbeentested
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 en-
vironmentsmaycauseinterferencewithradiocommunications,inwhichcase
the user at his own expense will be required to take whatever measures may
be required to correct this interference.

Related Documentation From Texas Instruments
vi
Electrostatic Sensitive Devices
ThisEVMcontainscomponentsthatcanpotentiallybedamagedby
electrostatic discharge. Always transport and store the EVM in its
supplied ESD bag when not in use. Handle using an antistatic
wristband. Operate on an antistatic work surface. For more
information on proper handling, refer to SSYA008.
Related Documentation From Texas Instruments
-TPA3004D2 data sheet (SLOS407)

Contents
vii
Contents
1 Introduction 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1 Description 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 TPA3004D2EVM Specifications 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Operation 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1 Quick Start List for Stand-Alone Operation 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Reference 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1 TPA3004D2 Schematic 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 EVM PCB Layers 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3 TPA3004D2 Parts List 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4 DC Volume Control for Class-D Outputs (OUT+ and OUT–) 3-6. . . . . . . . . . . . . . . . . . . . . .
3.5 DC Volume Control for Class-AB Outputs (VAROUTL and VAROUTR) 3-7. . . . . . . . . . . . .
Figures
1–1 The TI TPA3004D2 Audio Power Amplifier EVM (Top View) 1-2. . . . . . . . . . . . . . . . . . . . . . . . .
1–2 The TI TPA3004D2 Audio Power Amplifier EVM (Bottom View) 1-2. . . . . . . . . . . . . . . . . . . . .
3–1 TPA3004D2EVM Schematic 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–2 TPA3004D2EVM With External Headphone Amplifier Schematic 3-3. . . . . . . . . . . . . . . . . . . .
3–3 TPA3004D2EVM (Top View) 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–4 TPA3004D2EVM (Bottom View) 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tables
3–1 TPA3004EVM Parts List 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–2 DC Volume Control for Class-D Outputs 3-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–3 DC Volume Control for Class-AB Outputs 3-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

viii

1-1
Introduction
Introduction
This chapter provides a brief description of the TPA3004D2EVM.
Topic Page
1.1 Description 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 TPA3004D2EVM Specifications 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 1

Description
1-2
1.1 Description
The TPA3004D2 audio power amplifier evaluation module is a 12-watt per
channel class-D stereo audio power amplifier complete with a small number
of external components mounted on a circuit board that measures
approximately 2-1/4 inches by 1-3/4 inches (Figure 1–1 and Figure 1–2).
The TPA3004D2 can be interfaced with the TPA6110A2 to provide additional
headphone drive. The TPA3004D2 has an internal 5-V supply to power the
TPA6110A2, and thevariableoutputs of the TPA3004D2 are usedtodrive the
inputs of the TPA6110A2.
Figure 1–1.The TI TPA3004D2 Audio Power Amplifier EVM (Top View)
Figure 1–2.The TI TPA3004D2 Audio Power Amplifier EVM (Bottom View)

TPA3004D2EVM Specifications
1-3
Introduction
1.2 TPA3004D2EVM Specifications
Supply voltage range, VCC 8.5 V to 18 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage range, VI(MODE, VREF, VARDIFF, VARMAX, VOLUME, FADE) 0 V to 5.5 V. . . . . . .
VI(SHUTDOWN) 0 V to VCC + 0.3 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VI(RINN, RINP, LINN, LINP) 0 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supply current, ICC 3 A Max. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous output power per channel, PO: 8 Ω, VCC = 14 V, THD+N = 10% 12 W. . . . . . . . . . . . . . .
Minimum load impedance, RL4 Ω. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-4

2-1
Operation
Operation
This chapter describes how to operate the TPA3004D2EVM.
Topic Page
2.1 Quick Start List for Stand-Alone Operation 2-2. . . . . . . . . . . . . . . . . . . . . .
Chapter 2

Quick Start List for Stand-Alone Operation
2-2
2.1 Quick Start List for Stand-Alone Operation
Follow these steps to use the TPA3004D2EVM stand-alone or when
connecting it into existing circuits or equipment. Connections to the EVM
module header pins can be made via individual sockets, wire-wrapping, or
solderingtothepins,eitheronthetoporthebottomofthemodulecircuitboard.
2.1.1 Power Supply
1) Ensure that all external power sources are set to OFF.
2) Connect an external regulated power supply, between 8.5 V and 18 V, to
the module VCC and GND pins taking care to observe marked polarity.
TestpointsT3(AGND)andT4(AVDD)areoutputsoftheTPA3004D2.
Do not connect an external power supply to these test points.
2.1.2 Inputs and Outputs
1) Ensurethattheaudiosignalsourceleveladjustmentsaresettominimum.
2) Connect the right and left positive audio source to the module RIN+ and
LIN+ pins, respectively. Connect the right and left negative audio source
to the module RIN–and LIN–pins, respectively.
3) If using single ended inputs, ground the LIN+ and RIN+ pins and connect
the signal source to RIN–and LIN–.
Note:
If RIN+ and LIN+ on the EVM are connected to ground, the RINP and LINP
pins on the TPA3004D2 IC are ac-grounded through C2 and C3.
2.1.3 Evaluation Module Preparations
1) Adjust the signal source level as needed.
2.1.4 Control Inputs
Note:
Refer to the TPA3004D2 data sheet for logic threshold voltage ratings.
1) SHUTDOWN: This pin is active low. A low on this pin shuts down the
amplifier;ahighonthispinplacestheamplifierintheactivestate.Leaving
this pin floating also allows normal amplifier operation. Holding down
switchS1placestheamplifierintheshutdownstate.ReleasingS1returns
the amplifier to the active state. The absolute maximum voltage on this
terminal is VCC + 0.3 V.

Quick Start List for Stand-Alone Operation
2-3
Operation
2) MODE: This pin controls the stereo class-D outputs of the amplifier
(ROUT+, ROUT–, LOUT+, and LOUT–). A low on this pin allows the
amplifiertodrive stereo speakers in abridgedconfigurationacrossOUT+
andOUT–.AHIGHonthispindisablestheclass-Doutputsandthestereo
speakers connected across OUT+ and OUT–are muted. The class-AB
outputs, VAROUTL and VAROUTR, are active regardless of the voltage
on the MODE pin. The absolute maximum voltage on this terminal is 5.5
V.
3) FADE: This pin controls the stereo class-D and class-AB outputs of the
amplifier(ROUT+, ROUT–, LOUT+,LOUT–,VAROUTL, andVAROUTR)
during the four states of the device (power on, power off, coming out of
shutdown, and going into shutdown). This pin is active low. A low on this
pin causes the outputs (OUT+, OUT–, VAROUTL, and VAROUTR) to
slowly ramp up to volume, when the device is powered on or when the
device comes out of the shutdown state. A low also causes the outputs to
slowly ramp down in volume when the device goes into shutdown. A high
onthispincausestheoutputs(OUT+,OUT–,VAROUTL,andVAROUTR)
to instantaneously ramp up to volume when the device is powered on or
when the device comes out of the shutdown state. A high also causes the
outputs to instantaneously ramp down in volume when the device goes
into shutdown. The absolute maximum voltage on this terminal is 5.5 V.
Note:
Do not leave the FADE pin floating. The TPA3004D2EVM connects the
FADE pin to ground. If the fade function is to be disabled, unsolder the pin
and lift it off the module circuit board. Solder a wire to the pin and apply the
necessary voltage for the desired function.
2.1.5 Control Outputs
1) MODEB: ThispinisaTTL-compatibleoutputforcontrollingtheshutdown
pin of an external headphone amplifier. The MODEB pin drives low when
the MODE pin is high. When the MODE pin is low, the MODEB pin drives
high. If the MODEB pin is connected to the shutdown pin on an external
TPA6110A2, the TPA6110A2 mutes when the class-D outputs are active.
2.1.6 Power Up
1) Verify correct voltage andinputpolarityand set the externalpowersupply
to ON. The EVM should begin operation.
2) Adjust the signal source level as needed.
Adjusting the Speaker Volume
3) Adjust the speaker (connected across OUT+ and OUT–) volume as
needed by turning the P1 potentiometer in the clockwise direction to
increase the volume. Conversely, turn P1 in the counterclockwise
direction to decrease the volume. Refer to Table 3–2 in the Reference
section for volume control settings.

Quick Start List for Stand-Alone Operation
2-4
Setting Maximum Headphone Volume
4) Set the maximum possible VAROUT volume by adjusting P2. Turning P2
in the clockwise direction sets the limit to a higher volume. Turning P2 in
the counterclockwise direction lowers the VAROUT volume limit. Refer to
Table 3–3 in the Reference section for volume control settings.
Adjusting the Headphone Volume
5) Adjust the VAROUTL and VAROUTR (headphone) volume by adjusting
potentiometer P3. The headphone volume (VAROUT) is set by the
difference between VOLUME speaker voltage and VARDIFF voltage.
Turning P3 in the clockwise direction decreases the voltage on the
VARDIFF terminal and the VAROUT (headphone) volume increases.
Conversely, turning P3 in the counterclockwise direction increases the
VARDIFFvoltageanddecreasestheVAROUTvolume.RefertoTable3–3
in the Reference section for volume control settings.
TestPinsforExternalHPDriver,Regulated Output,Speaker Volume,and
Headphone Volume
-T1 –VAROUTR
-T2 –VAROUTL
-T3 –AGND
-T4 –AVDD –5 V regluated voltage capable of 120 mA output
-T5 –VOLUME –Speaker volume
-T6 –VARMAX –Max headphone volume
-T7 –VARDIFF –Headphone volume
2.1.7 External Headphone Amplifier Special Considerations
1) Refer to the TPA3004D2 data sheet or Figure 3–2 for proper pin
connections.
2) Noise may occur if proper grounding is not applied.
3) Additional load may be needed on outputs VAROUTR and VAROUTL to
obtain the full range of volume control. Apply a 10-kΩload on VAROUTR
and VAROUTL to ground, if required. The 10-kΩ load resistor reduces
feed-through audio when the amplifier is in the shutdown mode.

3-1
Reference
Reference
This chapter provides reference information for the TPA3004D2EVM.
Topic Page
3.1 TPA3004D2EVM Schematic 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 EVM PCB Layers 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3 TPA3004D2EVM Parts List 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4 DC Volume Control for Class-D Outputs (OUT+ and OUT–) 3-6. . . . . . .
3.5 DC Volume Control for Class-AB Outputs
(VAROUTL and VAROUTR) 3-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 3

TPA3004D2EVM Schematic
3-2
3.1 TPA3004D2EVM Schematic
Figure 3–1.TPA3004D2EVM Schematic
C11
C17
10 nF
C20 C12
10 nF
C21
220pF
C6
R1
C8
100 nF
C14
C7
C2
C1
C4
C3
LIN+
LIN–
RIN–
RIN+
SHUTDOWN
BSLP PVCCL PVCCL LOUTP LOUTP PGNDL PGNDL LOUTN LOUTN PVCCL PVCCL BSLN
TPA3004D2
VCLAMPR
SD
V2P5
RINP
LINN
LINP
AVDDREF
VREF
VARDIFF
VARMAX
VOLUME
REFGND
MODE
MODE_OUT
VAROUTR
VAROUTL
FADE
AVDD
AGND
COSC
ROSC
AVCC
VCLAMPL
BSRP
PVCCR PVCCR
ROUTP ROUTP
PGNDR PGNDR
ROUTN ROUTN
PVCCR
PVCCR
BSRN
RINN
C16
C5
R2
S1
Vcc
P3
50k P2
P1
T7
T6
T5
LOUT–
VCC VCC
LOUT+
C9
C15
10 nF
C18 C10
10 nF
C19
ROUT–
VCC
VCC
L3
(Bead)
C24
1nF
L4
(Bead)
C25
1nF
GND
GND
GND GND
VAROUTR (T1)
VAROUTL (T2)
AVDD (T4)
C13
GND
MODEB
MODE
AGND
AGND
AGND
AGND (T3)
PGND
PGND
PGND
PGND
GND
ROUT+
L1
(Bead)
C22
1 nF
L2
(Bead)
C23
1 nF
VCC
10 µF
0.1uF 0.1uF
1 µF
0.1 µF 10 µFR3
120 kΩ
120 kΩ
1 µF
0.1 µF0.1 µF
10 µF
50 kΩ
50 kΩ
1 µF
1 µF
1 µF
1 µF
1 µF
120 kΩ
R4
0 ΩR5 0 Ω
D1 D2
R6
0 ΩR7 0 Ω
D3 D4

TPA3004D2EVM Schematic
3-3
Reference
Figure 3–2.TPA3004D2 With External Headphone Amplifier Schematic
C11
C17
10 nF
C20 C12
10 nF
C21
C2
C1
C4
C3
LIN+
LIN–
RIN–
RIN+
SHUTDOWN
BSLP
PVCCL
PVCCL
LOUTP
PGNDL
PGNDL
LOUTN
LOUTN
PVCCL
PVCCL
BSLN
SD V2P5 RINP LINN LINP AVDDREF VREF VARDIFF VARMAX VOLUME REFGND VCLAMPL
BSRP
PVCCR
PVCCR
ROUTP
ROUTP
PGNDR
PGNDR
ROUTN
ROUTN
PVCCR
PVCCR
BSRN
RINN
C5
R2
S1
Vcc
P3
P2
P1
T7
T6
T5
LOUT–
VCC
VCC
LOUT+
C9
C15
10 nF
C18 C10
10 nF
C19
ROUT–
VCC
L3
(Bead)
C24
1 nF
L4
(Bead)
C25
1 nF
GND GND
GND
GND
AGND
AGND
AGND
PGND
PGND
L1
(Bead)
C22
1 nF
L2
(Bead)
C23
1 nF
VCC
220 pF
C6
R1
C8
100 nF
C14
C7
Cvcc
VCLAMPR
MODE_OUT
MODE
VAROUTR
VAROUTL
AVDD
FADE
AGND
COSC ROSC
AVCC
AVDD
AVDD
AVCC Cin1
Cin2
C16
Cout1
Cout2
Rout2
Rout1
AVDD
R3
IN1
Vo1
VDD
Vo2
IN2
SD
GND
BYP
TPA6110A2
Rhps2
Rhpf2
Rhps1 Rhpf1
Rin1
Rin2
ROUT+
0.1µF
0.1µF
10 µF
1µF
120kΩ
10kΩ
10kΩ
1µF
10 µF1µF
10kΩ
10kΩ
0.47µF
1kΩ 1kΩ
220µF
10kΩ
220µF
10kΩ
1µF
120 kΩ
0.1µF0.1µF
10 µF
120kΩ
1µF
1µF
1µF
1µF
1µF
50 kΩ
50 kΩ
50 kΩ
LOUTP
TPA3004D2
(T1)
(T2)
(T3)
(T4)
C13
0.1µF
PGND
D1 D2
R5 0Ω
R4
0Ω
R7 0Ω
R6
0Ω
D3 D4

EVM PCB Layers
3-4
3.2 EVM PCB Layers
Figure 3–3.TPA3004D2EVM (Top Layer)
Figure 3–4.TPA3004D2EVM (Bottom Layer)