Texas Instruments Stereo Amplifier TPA2012D2 User Manual

User's Guide  
SLOU174AFebruary 2005Revised April 2005  
TPA2012D2 Audio Power Amplifier Evaluation Module  
The TPA2012D2 audio power amplifier evaluation module is a complete, low-power,  
Class-D, stereo audio power amplifier capable of delivering 1.2 W/channel (YZH  
package). All components and the evaluation module are Pb-Free.  
Contents  
1
2
3
4
Introduction .......................................................................................... 1  
Operation ............................................................................................ 2  
Reference............................................................................................ 3  
Related Documentation From Texas Instruments.............................................. 6  
List of Figures  
1
2
3
4
TPA2012D2 Output Power ........................................................................ 2  
Top Layer............................................................................................ 4  
Bottom Layer ........................................................................................ 4  
TPA2012D2 EVM Schematic Diagram .......................................................... 5  
List of Tables  
1
2
Gain Settings........................................................................................ 3  
TPA2012D2 EVM Parts List....................................................................... 6  
1
Introduction  
This section provides an overview of the Texas Instruments (TI) TPA2012D2 NanoFree™ WCSP audio  
amplifier evaluation module (TPA2012D2 EVM). It includes a brief description of the module and a list of  
EVM specifications.  
1.1 TPA2012D2 EVM Specifications  
Supply voltage range, VDD  
2.5 V to 5.5 V  
2.5 A  
Power supply current rating required  
Continuous output power, PO: 4-BTL, VDD = 5 V  
Audio input voltage, VI  
1.2 W (see note)  
0 V to VDD  
4 Ω  
Minimum load impedance, ZL  
Note:  
The TPA2012D2 in the RTJ package (QFN) is rated at 2.1 W/channel. The YZH package  
(WCSP) is thermally limited to 1.2 W/channel on the EVM. For layouts with higher trace  
density and additional copper, the maximum output power will be larger. See the data  
sheet for device descriptions.  
NanoFree is a trademark of Texas Instruments.  
SLOU174AFebruary 2005Revised April 2005  
 
TPA2012D2 Audio Power Amplifier Evaluation Module  
1
 
Reference  
Table 1. Gain Settings  
Amplifier Gain Setting (typ)  
GAIN1(1)  
GAIN0(1)  
V/V  
2
dB  
6
0
0
1
1
0
1
0
1
4
12  
18  
24  
8
16  
(1)  
0 = Jumper installed, 1 = Jumper not installed  
2.1.2.3  
Shutdown Controls  
1. The TPA2012D2 provides independent shutdown controls so that each channel can be controlled  
separately. The shutdown pins, SDL and SDR, are active low. This means that a low voltage (ground)  
on this pin places the appropriate channel in shutdown mode. Using the pushbuttons provided on the  
EVM, the TPA2012D2 can be placed in shutdown by pressing and holding the button(s) down. Both  
buttons must be depressed in order for both channels of the TPA2012D2 to turn off. When the buttons  
are released, the appropriate channel on the device restarts.  
2. The jumper J1 can be used to tie SDL and SDR signals together. With jumper J1 installed, both  
channels can be placed in shutdown by pressing either SDL or SDR. This is the default configuration  
of the EVM.  
2.2 Power Up  
1. Verify the correct connections as described in Sections 2.1.1 and 2.1.2.  
2. Verify the voltage setting of the power supply is between 2.5 V and 5.5 V and turn ON the power  
supply. Proper operation of the EVM should begin.  
3. Adjust the audio signal source as needed.  
3
Reference  
This section includes the EVM schematic, parts list, and board layout reference.  
SLOU174AFebruary 2005Revised April 2005  
TPA2012D2 Audio Power Amplifier Evaluation Module  
3
 
   
Reference  
3.1 TPA2012D2 EVM PCB Layers  
Figure 2. Top Layer  
Figure 3. Bottom Layer  
4
TPA2012D2 Audio Power Amplifier Evaluation Module  
SLOU174AFebruary 2005Revised April 2005  
 
   
Reference  
3.2 TPA2012D2 EVM Schematic Diagram  
VDD  
VDD  
R4  
120 kW  
R3  
120 kW  
VDD  
GAIN1  
GAIN0  
C12  
10 mF  
C9  
10 mF  
VDD  
(Not Populated)  
VDD  
C11  
0.1 mF  
C10  
1 mF  
INL+  
INL−  
U1  
L4  
1 mF  
1 mF  
1 mF  
1 mF  
C5  
C6  
C7  
C8  
OUTL+  
OUTL−  
INL+  
OUTL+  
OUTL−  
OUTR−  
OUTR+  
INL−  
INR−  
INR+  
C4  
1 nF  
INR−  
INR+  
L3  
C3  
1 nF  
VDD  
R1  
120 kW  
L2  
L1  
OUTR−  
OUTR+  
SDR  
C2  
1 nF  
VDD  
SDR  
JP1  
R2  
120 kW  
SDL  
C1  
1 nF  
SDL  
Figure 4. TPA2012D2 EVM Schematic Diagram  
SLOU174AFebruary 2005Revised April 2005  
TPA2012D2 Audio Power Amplifier Evaluation Module  
5
 
 
Related Documentation From Texas Instruments  
3.3 TPA2012D2 Audio Power Amplifer Evaluation Module Parts List  
Table 2. TPA2012D2 EVM Parts List  
Part No.  
C1-C4  
Description  
Capacitor, Ceramic, 1 nF, 50V, X7R  
Capacitor, Ceramic, 1 µF, 6.3V, Y5V  
Capacitor, Ceramic, 0.1 µF, 6.3V, X5R  
Capacitor, Ceramic, 10 µF, 10V, Y5V  
Capacitor (Do not populate)  
Size  
0402  
0402  
0402  
0805  
0805  
0402  
Qty.  
4
Vendor Part Number  
TDK C1005X7R1H102  
TDK C1005Y5VOJ105  
TDK C1005X5R1A104  
TDK C2012Y5V1A106  
C5-C8, C10  
C11  
5
1
C12  
1
C9  
1
R1-R4  
SDL, SDR  
U1  
Resistor, 120 K, 1/16W, 1%  
2
Pb-free  
Momentary switch  
2
Panasonic, EVQ-PPBA25  
TPA2012D2 audio amplifier IC WCSP  
TPA2012D2 QFN package  
1
TI  
QFN  
TI  
GAIN0, GAIN1, Jumper, Position, 2 mm Header  
J1  
3
Norcomp 2163-36-01-P2  
PNP  
Terminal post headers  
12  
Sullins, PTC36SABN  
HEADERS  
SAMTEC TSW-19-8-G-S  
L1-L4  
PCB  
Ferrite Bead  
0603  
4
1
TDK MPZ1608S221A  
TPA2012D2 EVM printed circuit board  
4
Related Documentation From Texas Instruments  
TPA2012D2 2.1-W Stereo Filter-Free Class-D Audio Power Amplifier (SLOS438) This is the data  
sheet for the TPA2012D2 audio amplifier integrated circuit.  
6
TPA2012D2 Audio Power Amplifier Evaluation Module  
SLOU174AFebruary 2005Revised April 2005  
 
   
FCC Warnings  
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.  
EVM IMPORTANT NOTICE (CATEGORY B)  
IMPORTANT: TI is providing the enclosed TPA2012D2 evaluation module under the following conditions:  
This evaluation module (EVM) being provided by Texas Instruments (TI) is intended for use for ENGINEERING DEVELOPMENT  
OR EVALUATION PURPOSES ONLY and is not considered by Texas Instruments to be fit for commercial use. As such, this EVM  
may not be complete in terms of design and/or manufacturing related protective considerations including product safety measures  
typically found in the end-product incorporating the module. As a prototype, this product does not fall within the scope of the  
European Union Directive on electromagnetic compatibility and on low voltage and therefore may not meet the technical  
requirements of the directive. This EVM is not subject to the EU marking requirements.  
Should this EVM not meet the specifications indicated in the User’s Guide the EVM may be returned within 30 days  
from the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY  
TI 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 EVM. The user acknowledge that the use  
of the EVM could present serious hazards and that it is the user’s responsibility to take all precautions for the handling and  
use of the EVMs in accordance with good laboratory practices. Please be aware that the products received may not be  
regulatory compliant or agency certified (FCC, UL, 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.  
NEITHER PARTY WILL BE LIABLE TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUEN-  
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TI is currently dealing with various customers for products, and therefore our arrangement with the user will not be  
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TI assumes no liability for applications assistance, customer product design, software performance, or infringement  
of patents or services described herein.  
Please read the User’s Guide and specifically the section in the User’s Guide pertaining to warnings and restrictions prior to  
handling the product. This section contains important information regarding high temperature and voltages which TI  
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Persons handling the product should 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 combination,  
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This Agreement is subject to the laws of the State of Texas, excluding the body of conflicts of laws and the United Nations  
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EVM WARNINGS AND RESTRICTIONS  
It is important to operate this EVM within the input voltage range of 2.5 V to 5 V and the output voltage range of xxx V to xxx 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 60ï½ C. The EVM is designed to  
operate properly with certain components above 60ï½ 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 © 2004, Texas Instruments Incorporated  
 
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