Texas Instruments Stereo Amplifier TPA6204A1 User Manual

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User’s Guide  
August 2004  
Mixed-Signal Products  
SLOU167  
 
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  
 
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  
J
J
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.  
TPA6204A1 1.7-W Mono Fully Differential Audio Power  
Amplifier (literature number SLOS429) This is the data sheet for  
the TPA6204A1 audio amplifier integrated circuit.  
iii  
 
FCC Warning  
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.  
iv  
 
Contents  
1
2
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1  
1.1  
1.2  
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2  
TPA6204A1 EVM Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2  
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  
3.2  
3.3  
TPA6204A1 EVM Schematic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2  
TPA6204A1 Audio Power Amplifier Evaluation Module Parts List . . . . . . . . . . . . . . . . . . 3-2  
TPA6204A1 EVM PCB Layers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3  
Figures  
1−1  
3−1  
3−2  
3−3  
TI TPA6204A1 Audio Amplifier Evaluation Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2  
TPA6204A1 EVM Schematic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2  
TPA6204A1 EVM Top Layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3  
TPA6204A1 EVM Bottom Layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3  
Tables  
3−1  
TPA6204A1 EVM Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2  
v
 
vi  
 
Chapter 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  
1-1  
 
Description  
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, V  
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5 V to 5.5 V  
DD  
Power supply current rating required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 A  
Continuous output power, P : 8-BTL, V = 5 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.7 W  
O
DD  
Audio input voltage, V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 V to V , max  
I
DD  
Minimum load impedance, Z . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Ω  
L
1-2  
 
Chapter 2  
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  
2-1  
 
Quick Start List for Stand-Alone  
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 V and GND pins, taking care to observe marked polarity.  
DD  
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.  
2-2  
 
Chapter 3  
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  
3-1  
 
TPA6204A1 EVM Schematic Diagram  
3.1 TPA6204A1 EVM Schematic Diagram  
Figure 3−1. TPA6204A1 EVM Schematic Diagram  
V
DD  
2.5 V to 5.5 V  
V
DD  
GND  
C4  
10 µF  
R3  
100 kΩ  
SHUTDOWN  
+
S1  
SHUTDOWN V  
O−  
BYPASS  
IN+  
GND  
C5  
0.22 µF  
OUT−  
GND  
C1  
0.22 µF  
V
DD  
C3  
0.22 µF  
IN−  
V
O+  
IN+  
IN−  
R1  
20 kΩ  
OUT+  
C2  
0.22 µF  
R2  
20 kΩ  
3.2 TPA6204A1 Audio Power Amplifier Evaluation Module Parts List  
Table 3−1.TPA6204A1 EVM Parts List  
Manufacturer/  
Part Number  
Vendor/  
Part Number  
Reference  
Description  
Size  
Qty.  
C4  
Capacitor, 10 µF, 6.3 V  
A
1
Panasonic  
ECS-TOJY106R  
Digi-Key  
PCS1106CT−ND  
C1, C2,  
C3, C5  
Capacitor, 0.22 µF,  
0603  
0603  
0603  
4
2
1
1
7
1
1
Panasonic  
Digi-Key  
80%/−20%, nonpolarized  
ECJ−1VF1C224Z PCC1790TR−ND  
Panasonic Digi-Key  
ERJ−3EKF2002V P200KHCT−ND  
Panasonic Digi-Key  
ERJ−3EKF1003V PCS100KHCT−ND  
R1, R2  
Resistor, 20 k, 1/16 W, 1%  
Resistor, 100 k, 1/16 W, 1%  
Switch, momentary  
R3  
S1  
Panasonic  
P8048SCT-ND  
Digi-Key  
P8048SCT−ND  
Terminal post headers  
Sullins  
PTC36SABN  
Digi-Key  
S1022-36−ND  
U1  
IC, TPA6204A1, audio  
amplifier, 1.7 W, mono  
8-pin QFN  
TI  
TPA6204A1  
PCB1  
PCB, TPA6204A1 EVM  
Note: All items are SMD except terminal posts.  
3-2  
 
TPA6204A1EVM 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  
Schematic, Parts List, and PCB Layers  
3-3  
 
3-4  
 

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