Texas Instruments TPA6204A1 User manual


    
August 2004 Mixed-Signal Products
User’s Guide
SLOU167

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
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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,
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in which TI products or services are used. Information published by TI regarding third-party products or services
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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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Following are URLs where you can obtain information on other Texas Instruments products and application
solutions:
Products Applications
Amplifiers amplifier.ti.com Audio www.ti.com/audio
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DSP dsp.ti.com Broadband www.ti.com/broadband
Interface interface.ti.com Digital Control www.ti.com/digitalcontrol
Logic logic.ti.com Military www.ti.com/military
Power Mgmt power.ti.com Optical Networking www.ti.com/opticalnetwork
Microcontrollers microcontroller.ti.com Security www.ti.com/security
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Wireless www.ti.com/wireless
Mailing Address: Texas Instruments
Post Office Box 655303 Dallas, Texas 75265
Copyright 2004, 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 2003, Texas Instruments Incorporated

EVM WARNINGS AND RESTRICTIONS
It is important to operate this EVM within the input voltage range of 2.5 V to 5.5 V.
Exceeding the specified input range may cause unexpected operation and/or irreversible
damage to the EVM. If there are questions concerning the input range, please contact a TI
field representative prior to connecting the input power.
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
85°C. The EVM is designed to operate properly with certain components above 85°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 2003, Texas Instruments Incorporated

Information About Cautions and Warnings
iii
Preface

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
JTI 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.
JTPA6204A1 1.7-W Mono Fully Differential Audio Power
Amplifier (literature number SLOS429) This is the data sheet for
the TPA6204A1 audio amplifier integrated circuit.

FCC Warning
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
tested for compliance with the limits of computing devices pursuant to subpart
J of part 15 of FCC rules, which are designed to provide reasonable protection
against radio frequency interference. Operation of this equipment in other
environments may cause interference with radio communications, in which
case the user at his own expense will be required to take whatever measures
may be required to correct this interference.

Contents
v

1 Introduction 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1 Description 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 TPA6204A1 EVM Specifications 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Operation 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1 Quick Start List for Stand-Alone 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1.1 Power Supply 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1.2 Inputs and Outputs 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1.3 Control Input 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1.4 Power Up 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Schematic, Parts List, and PCB Layers 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1 TPA6204A1 EVM Schematic Diagram 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 TPA6204A1 Audio Power Amplifier Evaluation Module Parts List 3-2. . . . . . . . . . . . . . . . . .
3.3 TPA6204A1 EVM PCB Layers 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1−1 TI TPA6204A1 Audio Amplifier Evaluation Module 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3−1 TPA6204A1 EVM Schematic Diagram 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3−2 TPA6204A1 EVM Top Layer 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3−3 TPA6204A1 EVM Bottom Layer 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3−1 TPA6204A1 EVM Parts List 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Contents
vi

1-1
Introduction

This chapter provides an overview of the Texas Instruments (TI) TPA6204A1
audio amplifier evaluation module (TPA6204A1EVM). It includes a list of EVM
features, a brief illustrated description of the module, and a list of EVM
specifications.
Topic Page
1.1 Description 1−2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 TPA6204A1EVM Specifications 1−3. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 1

Description
1-2
1.1 Description
The TPA6204A1 audio power amplifier evaluation module is a complete,
low-power single-channel audio power amplifier. It consists of the TI
TPA6204A1 1.7-W low-voltage audio power amplifier IC 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.TI TPA6204A1 Audio Amplifier Evaluation Module
1.2 TPA6204A1 EVM Specifications
Supply voltage range, VDD 2.5 V to 5.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power supply current rating required 2 A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous output power, PO:8-ΩBTL, VDD = 5 V 1.7 W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Audio input voltage, VI0 V to VDD, max. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Minimum load impedance, ZL8 Ω. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-1
Operation

The following section desribes the steps to use the TPA6204A1EVM
stand-alone or with existing circuits. Connections can be made directly to the
module pins or it can be wired directly into existing circuits or equipment.
Topic Page
2.1 Quick Start List for Stand-Alone 2−2. . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 2

Quick Start List for Stand-Alone
2-2
2.1 Quick Start List for Stand-Alone
2.1.1 Power Supply
1) Ensure that all external power sources are set to OFF.
2) Connect an external regulated power supply, between 2.5 V and 5.5 V to
the module VDD and GND pins, taking care to observe marked polarity.
2.1.2 Inputs and Outputs
1) Ensure that the audio source level is set to minimum.
2) Connect the positive lead from the audio source to the module IN+ pin and
the negative lead to the IN− pin.
2.1.3 Control Inputs
1) SHUTDOWN: This pin is active low. A low on this pin shuts down the ampli-
fier; 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 to the active state. The absolute maximum volt-
age on this terminal is VCC + 0.3 V.
2.1.4 Power Up
1) Verify correct voltage and input polarity and set the external power supply
to on.
The EVM should begin to operate.
2) Adjust the audio source level as needed.

3-1
Schematic, Parts List, and PCB Layers
     
This chapter contains the schematic, parts list and the EVM PCB layers.
Topic Page
3.1 TPA6204A1 EVM Schematic Diagram 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 TPA6204A1 Audio Power Amplifier Evaluation Module Parts List 3-2.
3.3 TPA6204A1 EVM PCB Layers 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 3

TPA6204A1 EVM Schematic Diagram
3-2
3.1 TPA6204A1 EVM Schematic Diagram
Figure 3−1.TPA6204A1 EVM Schematic Diagram
C5
0.22 µF
C2
0.22 µF
R3
100 kΩ
IN−
SHUTDOWN S1
OUT−
GND
OUT+
R2
20 kΩ
C4
10 µF
C3
0.22 µF
SHUTDOWN
BYPASS
IN+
IN−
VO−
GND
VDD
VO+
GND
V
DD
2.5 V to 5.5 V
+
C1
0.22 µF
IN+ R1
20 kΩ
VDD
3.2 TPA6204A1 Audio Power Amplifier Evaluation Module Parts List
Table 3−1.TPA6204A1 EVM Parts List
Reference Description Size Qty. Manufacturer/
Part Number Vendor/ Part Number
C4 Capacitor, 10 µF, 6.3 V A 1 Panasonic
ECS-TOJY106R Digi-Key PCS1106CT−ND
C1, C2,
C3, C5 Capacitor, 0.22 µF, 80%/−20%, nonpolarized 0603 4 Panasonic ECJ−1VF1C224Z Digi-Key PCC1790TR−ND
R1, R2 Resistor, 20 kΩ, 1/16 W, 1% 0603 2 Panasonic
ERJ−3EKF2002V Digi-Key P200KHCT−ND
R3 Resistor, 100 kΩ, 1/16 W, 1% 0603 1 Panasonic
ERJ−3EKF1003V Digi-Key PCS100KHCT−ND
S1 Switch, momentary 1 Panasonic
P8048SCT-ND Digi-Key P8048SCT−ND
Terminal post headers 7Sullins
PTC36SABN Digi-Key S1022-36−ND
U1 IC, TPA6204A1, audio
amplifier, 1.7 W, mono 8-pin QFN 1 TI TPA6204A1
PCB1 PCB, TPA6204A1 EVM 1
Note: All items are SMD except terminal posts.

TPA6204A1EVM PCB Layers
3-3
Schematic, Parts List, and PCB Layers
3.3 TPA6204A1EVM PCB Layers
The following illustrations depict the TPA6204A1EVM PCB layers and
silkscreen. These drawings are not to scale. Gerber plots can be obtained from
the product folder on www.ti.com under Related Products − Development
Tools.
Figure 3−2.TPA6204A1 EVM Top Layer
Figure 3−3.TPA6204A1 EVM Bottom Layer

3-4