Texas Instruments TPA2028D1YZFEVM User Manual
User's Guide
SLOU283–February 2010
TPA2028D1YZFEVM
Contents
1 Introduction .................................................................................................................. 1
2 Operation ..................................................................................................................... 2
3 TPA2028D1YZFEVM Schematic ......................................................................................... 7
4 TPA2028D1YZFEVM PCB Layers ........................................................................................ 9
5 TPA2028D1YZFEVM Parts List ......................................................................................... 10
List of Figures
1 Place Shunts Horizontally Across SDA and SCL....................................................................... 2
2 Found New Hardware Wizard Advisory Screen....................................................................... 3
3 Starting the Software ....................................................................................................... 4
4 Software Interface........................................................................................................... 5
5 Connect I
6 TPA2028D1YZFEVM – YZF-Device Schematic, Page 1.............................................................. 7
7 TPA2028D1YZFEVM – YZF-Device Schematic, Page 2.............................................................. 8
8 TPA2028DYZF1EVM – YZF-Device Top Layer ........................................................................ 9
9 TPA2028D1YZFEVM – YZF-Device Bottom Layer..................................................................... 9
2
C Controls to JP3............................................................................................... 6
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.
List of Tables
Windows is a trademark of Microsoft Corporation.
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1
Operation
1.2 TPA2028D1YZFEVM Specifications
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V
DD
I
DD
P
o
V
I
RL Minimum load impedance 8 Ω
Supply voltage range –0.3 V to 6 V
Supply current 2 A Maximum
Continuous output power per channel, 8 Ω, Vdd = 5.0 V, THD + N = 10% 1.7 W
Audio Input Voltage 0.5 V to VDD- 0.5 V
2 Operation
The TPA2028D1YZFEVM can be evaluated in a stand-alone mode or when connected to existing circuits
with I2C controls.
2.1 Quick Start List for Stand-Alone Operation
A desktop or laptop computer with Windows™ XP installed is required in the stand-alone operation. Install
the software before connecting the EVM to a computer with a USB cable. The inputs accept standard
RCA plugs and the outputs accept banana connectors.
2.1.1 Software Installation Sequence
1. Insert the CD provided.
2. Unzip the files to a temporary folder.
3. Install TPA2028D1 software by executing setup.exe located in TPA2028D1 Interface\.
Accept license agreement and defaults, and complete the installation. Note: you can uninstall later with
Add/Remove Programs.
NOTE: It is unnecessary to repeat the steps in Section 2.1.1, once the software is installed.
2.1.2 Evaluation Module Preparations
1. Ensure that all external power sources are set to OFF.
2. Install shunt in jumper JP4;
3. Install shunts in jumpers JP2 when single-ended audio input is used; this ties IN– to ground.
4. Install shunts in J1 and J3 as shown in Figure 1. This sets the TPA2028D1 to accept I2C inputs from
the EVM itself.
Figure 1. Place Shunts Horizontally Across SDA and SCL
2
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5. Powering the EVM:
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
Operation
• 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.
Windows dialog (Figure 2), questions, and selections:
(a) Select "Install from a list or specific location (Advanced)", then click next.
(1)
(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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3
Operation
2.1.3 Using the Software
1. Start the TPA2028D1 Interface by clicking the Start menu and clicking on the TPA2028D1 Interface
icon.
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Figure 3. Starting the Software
2. The TPA2028D1 software interface is as shown in Figure 4.
4
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