User's Guide
SLOU283–February 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.
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SLOU283–February 2010
TPA2028D1YZFEVM
Copyright © 2010, Texas Instruments Incorporated
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 Ω to 32 Ω) 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
(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
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SLOU283–February 2010
TPA2028D1YZFEVM
Copyright © 2010, Texas Instruments Incorporated
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.
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SLOU283–February 2010
TPA2028D1YZFEVM
Copyright © 2010, Texas Instruments Incorporated
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.
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 Ω to 32 Ω) to the output banana jacks OUTP and OUTM.
9. Turn on power supply.
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TPA2028D1YZFEVM
SLOU283–February 2010
Copyright © 2010, Texas Instruments Incorporated
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 0Ω 1/8W 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 Ω 1/10W 1% ROHS
RES SMD0603 1.50 kΩ 1/10W 1% ROHS
RES 2.00 kΩ 1/16W 1% SMD 0603 ROHS
RES 3.09kΩ 1/10W 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 kΩ 1/16W 1% SMD 0603 ROHS
FERRITE BEADS
FB3, FB4
FB1, FB2
Ferrite SMD0805 600 Ω 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 Ω 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
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TPA2028D1YZFEVM
SLOU283–February 2010
Copyright © 2010, Texas Instruments Incorporated
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
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SLOU283–February 2010
TPA2028D1YZFEVM
Copyright © 2010, Texas Instruments Incorporated
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
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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