User's Manual

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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

C Controls to JP3............................................................................................... 6

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

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 I

C 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.

SLOU283–February 2010 TPA2028D1YZFEVM

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Summary of content (12 pages)

PAGE 1
User's Guide SLOU283 – February 2010 TPA2028D1YZFEVM 1 2 3 4 5 Contents Introduction .................................................................................................................. 1 Operation ..................................................................................................................... 2 TPA2028D1YZFEVM Schematic ......................................................................................... 7 TPA2028D1YZFEVM PCB Layers ................................
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Operation 1.2 2 www.ti.com TPA2028D1YZFEVM Specifications VDD Supply voltage range –0.3 V to 6 V IDD Supply current 2 A Maximum Po Continuous output power per channel, 8 Ω, Vdd = 5.0 V, THD + N = 10% VI Audio Input Voltage RL Minimum load impedance 1.7 W 0.5 V to VDD - 0.5 V 8Ω Operation The TPA2028D1YZFEVM can be evaluated in a stand-alone mode or when connected to existing circuits with I2C controls. 2.
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Operation www.ti.com 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.
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Operation 2.1.3 www.ti.com 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.
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Operation www.ti.com 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.
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Operation www.ti.com • • • 2.1.4 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.
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SLOU283 – February 2010 Submit Documentation Feedback Copyright © 2010, Texas Instruments Incorporated RCA (Black) IN GND GND JP2 White SDA SCL JP_IN DNP 0603 1.0ufd/10V C2 0603 1.0ufd/10V C1 FROM TAS1020 P1.0 DNP C21 100K R1 GND 0603 0603 S D GND C2 0603 DNP JP_VDD VDD A1 WCSP9-YZF U1 TPA2028D1YZF B2 1.0ufd/10V C3 C3 B3 A2 A3 GND SOT23-DBV3 BSS138ZXCT G Q1 0805 R16 0.0 GND GND C1 B1 1206 0805 FB2 0805 FB1 GND 10ufd/6.
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R7 Data5v NC TPA2028D1YZFEVM Copyright © 2010, Texas Instruments Incorporated 0805 GND 600 OHMS FB3 USB MINIB 27.4 Data+ Case NC 0805 FB4 0603 0603 0603 600 OHMS 27.4 R9 R8 GND ID_NC Case 1.50K Case Case J2 GND +3.3VD 0.0 0805 R15 USB+ 0603 GND 1206 GND 0.1ufd/10V C17 GND +3.3VD 10ufd/6.3V C16 USB+ 0603 GND 0603 GND 47pfd/50v 47pfd/50v SOP8-D(SOIC) 24LC64-I/SN C10 GND U2 C9 JP4 0603 R13 100K SOP8-D 3.3V/500mA VR1 0603 2.00K R6 0603 2.
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TPA2028D1YZFEVM PCB Layers www.ti.com 4 TPA2028D1YZFEVM PCB Layers B D Figure 8. TPA2028DYZF1EVM – YZF-Device Top Layer B D Figure 9.
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TPA2028D1YZFEVM Parts List 5 www.ti.com 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 TPA2028D1YZF Texas Instruments TPA2028D1YZF Texas Instruments VR1 VOLT REG 3.
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TPA2028D1YZFEVM Parts List www.ti.com 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 5001 Keystone Electronics 5001K Digi-Key S1, S2 Switch, MOM, 160G SMT 4X3MM ROHS 2 TL1015AF160QG E-Switch EG4344CT Digi-Key Norcomp INC.
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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.