Texas Instruments TPA3002D2EVM User manual

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December 2002 HPL
User’s Guide
SLOU151

IMPORTANT NOTICE
Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications,
enhancements, improvements, and other changes to its products and services at any time and to discontinue
any product or service without notice. Customers should obtain the latest relevant information before placing
orders and should verify that such information is current and complete. All products are sold subject to TI’s terms
and conditions of sale supplied at the time of order acknowledgment.
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.
TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right,
copyright, mask work right, or other TI intellectual property right relating to any combination, machine, or process
in which TI products or services are used. Information published by TI regarding third–party products or services
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
of the third party, or a license from TI under the patents or other intellectual property of TI.
Reproduction of information in TI data books or data sheets is permissible only if reproduction is without
alteration and is accompanied by all associated warranties, conditions, limitations, and notices. Reproduction
of this information with alteration is an unfair and deceptive business practice. TI is not responsible or liable for
such altered documentation.
Resale of TI products or services with statements different from or beyond the parameters stated by TI for that
product or service voids all express and any implied warranties for the associated TI product or service and
is an unfair and deceptive business practice. TI is not responsible or liable for any such statements.
Mailing Address:
Texas Instruments
Post Office Box 655303
Dallas, Texas 75265
Copyright 2002, Texas Instruments Incorporated

EVM IMPORTANT NOTICE
Texas Instruments (TI) provides the enclosed product(s) under the following conditions:
This evaluation kit being sold by TI is intended for use for 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.
Should this evaluation kit not meet the specifications indicated in the EVM User’s Guide, the kit may be returned
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, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY
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
received may not be regulatory compliant or agency certified (FCC, UL, CE, etc.). Due to the open construction
of the product, it is the user’s responsibility to take any and all appropriate precautions with regard to electrostatic
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’s Guide prior to handling the product. This notice contains important safety information about temperatures
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 2002, 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 V to 14 V, and supply current (Icc)should be no
greater than 3 A maximum.
Operating outside the specified supply voltage range may cause unexpected operation and/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.
Applying loads outside of the specified output range may result in unintended operation and/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.
During normal operation, some circuit components may have case temperatures greater than
60°C. The EVM is designed to operate properly with certain components above 60°C as long
as the input and output ranges are maintained. These components include but are not limited
to linear regulators, switching transistors, pass transistors, and current sense resistors. These
types of devices can be identified using the EVM schematic located in the EVM User’s Guide.
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 2002, 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
This equipment is intended for use in a laboratory test environment only. It gen-
erates, 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 en-
vironments 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.

Related Documentation From Texas Instruments
vi
Electrostatic Sensitive Devices
This EVM contains components that can potentially be damaged by
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
-TPA3002D2 data sheet (SLOS402)

Contents
vii
Contents
1 Introduction 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1 Description 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 TPA3002D2EVM Specifications 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Operation 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1 Quick Start List for Stand-Alone Operation 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1.1 Power Supply 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1.2 Inputs and Outputs 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1.3 Evaluation Module Preparations 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1.4 Control Inputs 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1.5 Control Outputs 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1.6 Power Up 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1.7 External Headphone Amplifier Special Considerations 2-3. . . . . . . . . . . . . . . . . . . .
3 Reference 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1 TPA3002D2EVM Schematic 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 EVM PCB Layers 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3 TPA3002D2EVM 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. . . . . . . . . . . . .

Contents
viii
Figures
1–1 The TI TPA3002D2 Audio Power Amplifier EVM (Top View) 1-2. . . . . . . . . . . . . . . . . . . . . . . . .
1–2 The TI TPA3002D2 Audio Power Amplifier EVM (Bottom View) 1-2. . . . . . . . . . . . . . . . . . . . .
3–1 TPA3002D2EVM Schematic 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–2 TPA3002D2EVM with External Headphone Amplifier Schematic 3-3. . . . . . . . . . . . . . . . . . . . .
3–3 TPA3002D2EVM (Top Layer) 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–4 TPA3002D2EVM (Bottom Layer) 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tables
3–1 TPA3002D2EVM 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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1
Introduction
Introduction
This chapter provides a brief description of the TPA3002D2EVM.
Topic Page
1.1 Description 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 TPA3002D2EVM Specifications 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 1

Description
1-2
1.1 Description
The TPA3002D2 audio power amplifier evaluation module is a 9-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 TPA3002D2 can be interfaced with the TPA6110A2 to provide additional
headphone drive. The TPA3002D2 has an internal +5 V supply to power the
TPA6110A2, and the variable outputs of the TPA3002D2 are used to drive the
inputs of the TPA6110A2.
Figure 1–1.The TI TPA3002D2 Audio Power Amplifier EVM (Top View)
Figure 1–2.The TI TPA3002D2 Audio Power Amplifier EVM (Bottom View)

TPA3002D2EVM Specifications
1-3
Introduction
1.2 TPA3002D2EVM Specifications
Supply voltage range, VCC 8 V to 14 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage range, VI(MODE, VREF, VARDIFF, VARMAX, VOLUME) 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 = 12 V, THD+N = 10% 9 W. . . . . . . . . . . . . . . . .
Minimum load impedance, RL8 Ω. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-4

2-1
Operation
Operation
This chapter describes how to operate the TPA3002D2EVM.
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 TPA3002D2 EVM 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
soldering to the pins, either on the top or the bottom of the module circuit board.
2.1.1 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.
2.1.2 Inputs and Outputs
1) Ensure that the audio signal source level adjustments are set to minimum.
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–.
2.1.3 Evaluation Module Preparations
1) Adjust the signal source level as needed.
2.1.4 Control Inputs
Note:
Refer to the TPA3002D2 data sheet for logic threshold voltage ratings.
1) SHUTDOWN: This pin is active low. A low on this pin shuts down the
amplifier; a high on this pin places the amplifier in the active state. Leaving
this pin floating also allows normal amplifier operation. Holding down
switch S1 places the amplifier in the shutdown state. Releasing S1 returns
the amplifier to the active state. The absolute maximum voltage on this
terminal is VCC + 0.3 V.
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
amplifier to drive stereo speakers in a bridged configuration across OUT+
and OUT–. A HIGH on this pin disables the class-D outputs and the stereo
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.
2.1.5 Control Outputs
1) MODEB: This pin is a TTL-compatible output for controlling the shutdown
pin of an external headphone amplifier. The MODEB pin drives low when

Quick Start List for Stand-Alone Operation
2-3
Operation
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 and input polarity and set the external power supply
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.
Setting Maximum Headphone Volume
4) Set the maximum possible VAROUT volume by adjusting P2. Turning P2
in the clockwise direction sets the limit higher. 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
VARDIFF voltage and decreases the VAROUT volume. Refer to Table 3–3
in the Reference section for volume control settings.
Test Pins for External HP Driver, 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 TPA3002D2 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

Quick Start List for Stand-Alone Operation
2-4
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 TPA3002D2EVM.
Topic Page
3.1 TPA3002D2EVM Schematic 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 EVM PCB Layers 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3 TPA3002D2EVM 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

TPA3002D2EVM Schematic
3-2
3.1 TPA3002D2EVM Schematic
Figure 3–1.TPA3002D2EVM 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
TPA3002D2
VCLAMPR
SD
V2P5
RINP
LINN
LINP
AVDDREF
VREF
VARDIFF
VARMAX
VOLUME
REFGND
MODE
MODEB
VAROUTR
VAROUTL
AGND
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

TPA3002D2EVM Schematic
3-3
Reference
Figure 3–2.TPA3002D2 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
MODEB
VAROUTR
VAROUTL
AGND
AVDD
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
TPA3002D2
(T1)
(T2)
(T3)
(T4)
C13
0.1µF
PGND

EVM PCB Layers
3-4
3.2 EVM PCB Layers
Figure 3–3.TPA3002D2EVM (Top Layer)
Figure 3–4.TPA3002D2EVM (Bottom Layer)