Texas Instruments Car Amplifier TPA2028D1YZFEVM User Manual

User's Guide  
SLOU283February 2010  
TPA2028D1YZFEVM  
Contents  
1
2
3
4
5
Introduction .................................................................................................................. 1  
Operation ..................................................................................................................... 2  
TPA2028D1YZFEVM Schematic ......................................................................................... 7  
TPA2028D1YZFEVM PCB Layers ........................................................................................ 9  
TPA2028D1YZFEVM Parts List ......................................................................................... 10  
List of Figures  
1
2
3
4
5
6
7
8
9
Place Shunts Horizontally Across SDA and SCL.......................................................................  
Found New Hardware Wizard Advisory Screen.......................................................................  
Starting the Software .......................................................................................................  
Software Interface...........................................................................................................  
Connect I2C Controls to JP3...............................................................................................  
TPA2028D1YZFEVM – YZF-Device Schematic, Page 1..............................................................  
TPA2028D1YZFEVM – YZF-Device Schematic, Page 2..............................................................  
TPA2028DYZF1EVM – YZF-Device Top Layer ........................................................................  
TPA2028D1YZFEVM – YZF-Device Bottom Layer.....................................................................  
List of Tables  
1
Bill of Materials for TPA2028D1YZFEVM .............................................................................. 10  
1
Introduction  
1.1 Description  
The TPA2028D1 is a mono, filter-free Class-D audio power amplifier with automatic gain control (AGC),  
dynamic range compression (DRC) and I2C digital volume control. The AGC and DRC functions enhance  
the perceived audio loudness, and at the same time prevent speaker damage from overdrive. The  
TPA2028D1 has independent software shutdown control and a 30-step volume control. Availability in the  
WCSP package makes TPA2028D1 an ideal choice for both cellular handsets and PDAs.  
The TPA2028D1 evaluation module (EVM) is a complete, stand-alone audio board. It contains the  
TPA2028D1 WCSP (YZF) Class-D audio power amplifier.  
All components and the EVM are Pb free.  
Windows is a trademark of Microsoft Corporation.  
1
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Operation  
5. Powering the EVM:  
The EVM can be powered via USB connection or by external power supply:  
(a) Via USB power: Install shunt for USBPWR if USB power is used.  
(b) External power supply: connect an external regulated power supply adjusted for 2.5 V–5.5 V to the  
VDD and GND banana jacks, taking care to observe marked polarity. Make sure USBPWR is  
removed in this case.  
Note:  
(a) USB interface may not be able to provide enough current. For best audio performance, use  
external power supply.  
(b) Make sure only one power source is used. Connecting two power sources will cause damage  
to the device and the supply.  
6. Connect audio source to RCA jacks IN.  
7. Connect speakers (8 to 32 ) to the output banana jacks OUTP and OUTM.  
8. Plug in USB.  
9. Turn on the power supply.  
10. If this is the first time a TPA2028D1YZFEVM is plugged in after installing the software, follow the  
Windows dialog (Figure 2), questions, and selections:  
(1)  
(a) Select "Install from a list or specific location (Advanced)", then click next.  
(b) Browse to the folder where the TPA2028D1 interface is installed then click ok.  
(c) Windows will automatically install the driver.  
Figure 2. Found New Hardware Wizard Advisory Screen  
NOTE: It is not necessary to repeat steps 10. a. to c., once the driver is installed.  
(1)  
Computer screen images showing Windows XP interface are courtesy of Microsoft Corporation  
3
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Operation  
2.1.3  
Using the Software  
1. Start the TPA2028D1 Interface by clicking the Start menu and clicking on the TPA2028D1 Interface  
icon.  
Figure 3. Starting the Software  
2. The TPA2028D1 software interface is as shown in Figure 4.  
4
TPA2028D1YZFEVM  
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Operation  
Figure 4. Software Interface  
NOTE: The TPA2028D1 powers up with the amplifier in software shutdown. To hear an output,  
uncheck shutdown.  
3. Uncheck and check SPK_EN to place the Class-D output in and out of CHANNEL SHUTDOWN.  
4. Click Shutdown to place the TPA2028D1 in and out of SOFTWARE SHUTDOWN.  
5. Adjust the Attack Time, Release Time and Hold Time by sliding the bar or clicking the tap in the GUI.  
You can also type a value in the box; in that case, the value will be rounded to the closest available  
setting.  
6. Adjust the Fixed Gain, Maximum Gain and Limiter Level by dragging the bar or clicking the tap in the  
GUI. You can also type a value in the box; in that case, the value will be rounded to the closest  
available setting.  
7. Adjust Compression Ratio and Noise Gate Threshold by clicking the value.  
8. The Limiter Power Level can be calculated by selecting the Load Resistance.  
9. I2C Status box reports the status of I2C communications. An error or failure has occurred if it shows  
I2C failure.  
10. To read the I2C status, click Refresh.  
11. Thermal box reports the status of thermal failure. A thermal fault has occurred if it turns red.  
12. Click Show Graph to display the AGC transfer function. The transfer function is automatically updated  
with the current AGC parameters (fixed gain, maximum gain, limiter level and compression) in GUI.  
Click Hide Graph to hide the transfer function.  
13. Volume Macro simulates volume control by changing fixed gain, limiter level and maximum gain  
simultaneously. Follow the steps below to use the Volume Marco.  
At the top left corner of the GUI, select Volume Macro.  
Slide the volume bar to adjust the volume.  
Click Volume Marco again to go back to GUI.  
Click refresh to update the AGC parameters.  
14. The GUI has a built-in I2C programming interface. Follow the steps below to use the I2C programming  
function.  
At the top left corner of the GUI, click File to access the I2C programming interface.  
5
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Operation  
Save Script can record the current register values. Select Save Script >> Click the folder icon to  
browse to the place where you want to save the script >> name the file in text format, then select  
OK to save.  
Load Script can load the previously saved script to program the entire register file. Select Load  
Script >> Click the folder icon to browse to the place where the script is located >> Select the file  
then click OK >> Click Load.  
I2C interface can program individual register value of TPA2028D1. Select I2C Interface >> I2C  
address is xB0, which is the address of TPA2028D1. Device address is from 1 to 7, which is the  
register address of TPA2028D1.  
2.1.4  
Shutdown Control  
The TPA2028D1 EVM provides independent hardware shutdown controls for the Class-D power amplifier  
and the USB controller.  
1. Press and hold push button S1 to shutdown TPA2028D1. Release S1 to activate TPA2028D1.  
2. Press and hold push button S2 to shutdown the USB controller. Release S2 to activate the USB  
controller.  
2.2 Quick Start List When Connected to Existing Circuits With I 2 C Controls  
The TPA2028D1YZFEVM can be easily connected to existing circuits with I2C controls. Connections to the  
EVM module can be made using banana plugs for the power supply. The inputs accept standard RCA  
plugs and the outputs accept banana connectors.  
2.2.1  
Evaluation Module Preparations  
1. Ensure that all external power sources are set to OFF.  
2. Install shunts in jumpers JP4.  
3. Remove shunts between J1 and J3 and connect I2C controls to J1 as shown in Figure 5.  
Figure 5. Connect I2C Controls to JP3  
4. Install shunts in jumpers JP2 when single-ended audio input is used; this ties IN– to ground.  
5. Remove USBPWR.  
6. Connect an external regulated power supply adjusted for 2.5 V–5.5 V to the VDD and GND banana  
jacks, taking care to observe marked polarity.  
7. Connect audio source to IN.  
8. Connect speakers (8 to 32 ) to the output banana jacks OUTP and OUTM.  
9. Turn on power supply.  
6
TPA2028D1YZFEVM  
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TPA2028D1YZFEVM Schematic  
3
TPA2028D1YZFEVM Schematic  
Figure 6. TPA2028D1YZFEVM – YZF-Device Schematic, Page 1  
7
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TPA2028D1YZFEVM Schematic  
1 J  
4
A D S  
L C S  
3
2
1
Figure 7. TPA2028D1YZFEVM – YZF-Device Schematic, Page 2  
8
TPA2028D1YZFEVM  
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TPA2028D1YZFEVM PCB Layers  
4
TPA2028D1YZFEVM PCB Layers  
DB  
Figure 8. TPA2028DYZF1EVM – YZF-Device Top Layer  
DB  
Figure 9. TPA2028D1YZFEVM – YZF-Device Bottom Layer  
9
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TPA2028D1YZFEVM Parts List  
5
TPA2028D1YZFEVM Parts List  
Table 1. Bill of Materials for TPA2028D1YZFEVM  
Ref Des  
Description  
QTY  
MFR Part No.  
MFR  
Vendor Part No. Vendor  
TI SEMICONDUCTORS  
U5  
1.7 W Mono speaker driver W/AGC I2C CTRL,  
WCSP9-YZF ROHS  
1
1
1
TPA2028D1YZF  
Texas  
Instruments  
TPA2028D1YZF Texas  
Instruments  
VR1  
U4  
VOLT REG 3.3V 500mA LDO fast transient response  
SOP8-D ROHS  
TPS77533D  
Texas  
Instruments  
296-2776-5  
Digi-Key  
USB Streaming controller TQFP48-PFB ROHS  
64K I2C SERIAL EEPROM SOP8-D  
TAS1020BPFB  
Texas  
Instruments  
296-13041-5  
Digi-Key  
SEMICONDUCTIORS  
U2  
Q1  
1
1
24LC64-I/SN  
BSS138TA  
Microchip  
Zetex  
24LC64-I/SN  
BSS138ZXCT  
Digi-Key  
Digi-Key  
N-CH Enhancement mode VERT DMOS FET  
SOT23-DBV3 ROHS  
Y1  
Crystal, 6.000 MHz, SMT-HC49/US CSM-7 ROHS  
1
ECS-60-32-5PXDN-TR ECS  
XC1295CT  
Digi-Key  
CAPACITORS  
C11,C12  
C9, C10  
C13  
CAP 33 pF 50V 5% CERM 0603 NPO ROHS  
CAP 47 pF 50V 5% CERM 0603 NPO ROHS  
CAP 100 pF 50V 5% CERM 0603 NPO ROHS  
CAP 1000 pF 50V 5% CERM 0603 COG ROHS  
CAP 4700 pF 50V CERM 0603 X7R ROHS  
CAP SMT0603 CERM 0.1mF 10V 5% X7R ROHS  
2
2
1
1
2
4
ECJ-1VC1H330J  
Panasonic  
Panasonic  
Panasonic  
TDK Corp.  
Panasonic  
PCC330ACVCT Digi-Key  
PCC470ACVCT Digi-Key  
PCC101ACVCT Digi-Key  
ECJ-1VC1H470J  
ECJ-1VC1H101J  
C1608C0G1H102J  
ECJ-1VB1H472K  
C14  
445-1293-1  
PCC1780CT  
399-1095-1  
Digi-Key  
Digi-Key  
Digi-Key  
C6, C7  
C15, C17,  
C19, C20  
C0603C104K8RACTU Kemet  
C1–C3  
C8, C16  
C18  
CAP 1.0 mF 10V 10% CERM 0603 X5R ROHS  
CAP 10 mF 6.3V 10% CERM 1206 X5R ROHS  
CAP TANT2412 100 mF 10V 10% B45197A ROHS  
3
2
1
ECJ-1VB1A105K  
C3216X5R0J106K  
B45197A2107K309  
Panasonic  
PCC2174CT  
445-1388-1  
495-1528-1  
Digi-Key  
Digi-Key  
Digi-Key  
TDK  
Kemet  
RESISTORS  
R15, R16  
R8, R9  
R7  
RES 01/8W 5% SMD 0805 ROHS  
2
2
1
3
1
3
ERJ-6GEY0R00V  
Panasonic  
P0.0ACT  
Digi-Key  
Digi-Key  
Digi-Key  
Digi-Key  
Digi-Key  
Digi-Key  
RESISTOR SMD0603 27.4 1/10W 1% ROHS  
RES SMD0603 1.50 k1/10W 1% ROHS  
RES 2.00 k1/16W 1% SMD 0603 ROHS  
RES 3.09k1/10W 1% SMD 0603 ROHS  
CRCW060327R4FKEA Vishay  
541-27.4HCT  
P1.50KHCT  
P2.00KHCT  
P3.09KHCT  
P100KHCT  
ERJ-3EKF1501V  
ERJ-3EKF2001V  
ERJ-3EKF3091V  
ERJ-3EKF1003V  
Panasonic  
Panasonic  
Panasonic  
Panasonic  
R5, R6, R12  
R10  
R1, R11, R13 RES 100 k1/16W 1% SMD 0603 ROHS  
FERRITE BEADS  
FB3, FB4  
FB1, FB2  
Ferrite SMD0805 600 0.24 A RDC=0.14 ROHS  
2
2
MMZ2012R601A  
HI0805R800R-10  
TDK  
445-1554-1  
240-2395-1  
Digi-Key  
Digi-Key  
Ferrite bead SMD0805 80 at 100 MHz 5A ROHS  
Steward  
HEADERS AND JACKS  
J3, JP2, JP4, Header 2 Pin, PCB 2,0 mm ROHS  
USB PWR  
4
26630201RP2  
Norcomp  
2663S-02  
Digi-Key  
J1  
IN  
J2  
Header 4 Pin, PCB 2,0 mm ROHS  
Jack, RCA 3-Pin PCB-RA Black ROHS  
Jack USB MINIB SMT-RA 5Pin ROHS  
1
1
1
26630401RP2  
PJRAN1X1U01X  
UX60-MB-5ST  
Norcomp  
Switchcraft  
Hirose  
2663S-04  
65K7770  
H2959CT  
Digi-Key  
NEWARK  
Digi-Key  
10  
TPA2028D1YZFEVM  
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Copyright © 2010, Texas Instruments Incorporated  
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TPA2028D1YZFEVM Parts List  
Table 1. Bill of Materials for TPA2028D1YZFEVM (continued)  
Ref Des  
Description  
QTY  
MFR Part No.  
MFR  
Vendor Part No. Vendor  
TESTPOINTS AND SWITCHES  
SCL, SDA,  
TP OUTM,  
TP OUTP  
PC Testpoint, white, ROHS  
4
5002  
Keystone  
Electronics  
5002K  
Digi-Key  
TP GND  
PC Testpoint, black, ROHS  
1
2
5001  
Keystone  
Electronics  
5001K  
Digi-Key  
Digi-Key  
S1, S2  
Switch, MOM, 160G SMT 4X3MM ROHS  
TL1015AF160QG  
E-Switch  
EG4344CT  
SHUNTS  
JP2, JP4  
Shunt, black AU Flash 2mmLS  
2
810-002-SP2L001  
Norcomp  
INC.  
SP2-001E  
J587  
Digi-Key  
Digi-Key  
BINDING POSTS  
GND,  
VDD,OUTM,  
OUTP  
Binding-post, NONINS, THRU, ROHS  
4
111-2223-001  
Emerson  
NPCS  
STANDOFFS AND HARDWARE  
HW1–HW4  
HW1–HW4  
Standoff ,4-40 0.5 in 3/16 in Diameter ALUM RND F-F  
4-40 Screw, Steel 0.250 IN  
4
4
2027  
Keystone  
2027K  
H342  
Digi-Key  
Digi-Key  
PMS 440 0025 PH  
Building  
Fasteners  
COMPONENTS NOT ASSEMBLED  
C21, C4, C5, R2, R3, JP_VDD, JP_VOUT, JP_VIN  
11  
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EVALUATION BOARD/KIT IMPORTANT NOTICE  
Texas Instruments (TI) provides the enclosed product(s) under the following conditions:  
This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES  
ONLY and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling the product(s) must have  
electronics training and observe good engineering practice standards. As such, the goods being provided are not intended to be complete  
in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including product safety and environmental  
measures typically found in end products that incorporate such semiconductor components or circuit boards. This evaluation board/kit does  
not fall within the scope of the European Union directives regarding electromagnetic compatibility, restricted substances (RoHS), recycling  
(WEEE), FCC, CE or UL, and therefore may not meet the technical requirements of these directives or other related directives.  
Should this evaluation board/kit not meet the specifications indicated in the User’s Guide, the board/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. 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 User’s Guide and, specifically, the Warnings and Restrictions notice in the User’s Guide prior to handling the product. This  
notice contains important safety information about temperatures and voltages. For additional information on TI’s environmental and/or  
safety programs, please contact the TI application engineer or visit www.ti.com/esh.  
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.  
FCC Warning  
This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES  
ONLY and is not considered by TI to be a finished end-product fit for general consumer use. It generates, uses, and can radiate radio  
frequency energy and has not been tested for compliance with the limits of computing devices pursuant to 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 WARNINGS AND RESTRICTIONS  
It is important to operate this EVM within the supply voltage range of –0.3 V to 6 V and the input voltage range of –0.3 V to VDD +0.3 .  
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 © 2009, Texas Instruments Incorporated  
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