Texas Instruments TPA2054D4EVM Bedienungsanleitung

1 Introduction

1.1 Description

User's GuideSLOU249 – April 2009

TPA2054D4EVM

Contents1 Introduction ................................................................................................................... 12 Operation ..................................................................................................................... 23 TPA2054D4EVM Schematic ............................................................................................... 94 TPA2054D4EVM PCB Layers ............................................................................................ 105 TPA2054D4EVM Parts List ............................................................................................... 12

List of Figures

1 Stereo Differential Mode Input Configuration ............................................................................ 32 Non-Differential Mode Input Configuration ............................................................................... 33 Place Shunts Horizontally Across SCL and SDA ........................................................................ 34 Starting the TPA2054D4 Interface ......................................................................................... 55 TPA2054D4EVM Graphical User Interface ............................................................................... 66 Connect I

C Controls to JP3 ............................................................................................... 87 TPA2054D4EVM Schematic ............................................................................................... 98 TPA2054D4EVM – Top Layer ............................................................................................ 109 TPA2054D4EVM – Layer 2 .............................................................................................. 1010 TPA2054D4EVM – Layer 3 ............................................................................................... 1111 TPA2054D4EVM – Bottom Layer ........................................................................................ 11

List of Tables

1 Jumpers Default Setting .................................................................................................... 22 Test Points Information ..................................................................................................... 43 TPA2054D4EVM Parts List ............................................................................................... 12

The TPA2054D4EVM is a stereo Class-D power amplifier along with a stereo DirectPath™ headphoneamplifier. Both input channels have 32-step volume control and the DirectPath headphone amplifier has a4-step level gain control with power limiter. The volume is controlled through an I

C™ interface. Allamplifiers have output short-circuit and thermal-overload protection.

The TPA2054D4EVM ( evaluation module) is a complete, stand-alone audio board. It contains theTPA2054D4 WCSP(YZK) Class-D audio subsystem.

All components and the EVM are lead free.

DirectPath is a trademark of Texas Instruments.Windows is a trademark of Microsoft Corporation.I

C is a trademark of Philips Electronics.

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1.2 TPA2054D4EVM Specifications

2 Operation

2.1 Quick Start for Stand-Alone Operation

2.1.1 Software Installation Sequence

2.1.2 Evaluation Module Setup

Operation

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PARAMETER VALUE UNITS

Supply voltage range –0.3 to 6 VI

Supply current 1.5 Maximum ASpeaker Continuous output power per channel,

1.25 W8Ω, V

= 5 V, THD + N = 1%P

Headphone Continuous output power per channel,

145 mW16 Ω, V

= 5 V, THD + N = 1%Minimum load impedance (Speaker) 8 ΩR

Minimum load impedance (Headphone) 16 Ω

The TPA2054D4EVM can be evaluated in a stand-alone mode or when connected to existing circuits withI

C controls.

A desktop or laptop computer running the Windows™ XP operating system is required for the stand-aloneoperation. Connect the EVM to a computer using a USB cable. A jumper (JP9) provides the option for theTPA2054D4 to receive power from the USB or an external supply using banana plugs. The inputs acceptstandard RCA plugs. The speaker output connection accepts banana plugs. The headphone outputconnection accepts standard 3.5 mm headphone plugs.

1. Insert the TPA2054D4EVM Software Installation CD provided.2. Unzip the files to a temporary folder onto a PC.3. Install TPA2054D4 software by double-clicking the filename setup.exe located in TPA2054D4 Setupfolder.

4. Accept license agreement and defaults; then complete the installation.

Note: Uninstall the TPA2054D4 software at a later time using the Add/Remove Programs foundunder the Windows Control Panel. It is unnecessary to repeat the preceding steps, once thesoftware is installed.

1. Configure the jumpers using Table 1 for the default settings:

Table 1. Jumpers Default Setting

Jumper Default Setting

JP1 (DVDD) ShuntJP2, JP3 Shunt across each otherJP4 ShuntJP5, JP6, JP7, JP8 As shown in Figure 2JP9 (USB PWR) Remove

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Right Channel

Plugs Here

Left Channel

Plugs Here

Mono Channel

Plugs Here

Stereo 2

RCA Plugs

Here

Stereo 1

RCA Plugs

Here

R L Mono Channel

Plugs Here

Shunts, Across SCL and SDA

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Operation

2. Configure the input according to the desired TPA2054D4 operation mode:a. Stereo Differential Mode (MODE[2:0] = 011):Install shunts and connect RCA plugs as shown in Figure 1 .

Figure 1. Stereo Differential Mode Input Configuration

b. For all other modes, install shunts and connect RCA plugs as shown in Figure 2 .

Figure 2. Non-Differential Mode Input Configuration

3. Install shunts in JP2 and JP3 as shown in Figure 3 . This sets the TPA2054D4 to accept I

C inputsfrom the EVM itself.

Figure 3. Place Shunts Horizontally Across SCL and SDA

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Operation

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4. Ensure all external power sources are set to OFF.5. Connect an external regulated power supply adjusted from 2.5 V to 5.5 V to the module VDD (J5) andGND (J6) banana jacks, taking care to observe the marked polarity.6. Install shunt in JP1 if DVDD is powered by the 1.8 V regulated supply from the EVM itself. If DVDD ispowered by another supply(between 1.8 V and 3.3 V), remove shunt in JP1 and connect the supply atheader 1 of JP1.7. HPVDD is set to VDD by default. If HPVDD is powered by another supply (between 2.5 V and 5.5 V),remove R17 and connect the supply at TP24.8. Connect audio source as mentioned in step two.9. Connect headphones to J4.10. Connect speakers (8 Ωto 32 Ω) to the output (J11, J12 for LOUT and J13, J14 for ROUT). Thespeakers can also be connected to J2 and J3 if header connection is available in the speakers.11. Plug in the USB.12. Turn on power sources.13. The TPA2054D4 can also be powered by USB cable if the audio amplifier output power is less than100mW. Shunt JP9 and remove the power supply at J5 and J6 for USB power option.14. This table provides the test points information on the EVM:

Table 2. Test Points Information

Test Point Description

TP1, TP2, TP3, TP4 OUTR+, OUTR-, OUTL-, OUTL+Filtered OUTR+, OUTR-, OUTL-,TP5, TP6, TP7, TP8

OUTL+TP9 HPVSSTP10 INR_1TP11 INL_1TP12 INL_2TP13 INR_2T14 HPRIGHTT15 HPLEFTTP18 DVDDTP20 SCLTP23 SDATP24 HPVDDTP27 VREFTP19, TP21, TP22, TP25, TP26 GND

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2.1.3 Using the Software

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Operation

1. Start the TPA2054D4 Interface by clicking the Start menu and clicking the All Programs →TexasInstruments Inc →TPA2054D4 Interface cascading menus shown in Figure 4 .

Figure 4. Starting the TPA2054D4 Interface

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Operation

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2. The TPA2054D4 software graphical user interface displays as shown in Figure 5 .

Figure 5. TPA2054D4EVM Graphical User Interface

Note: The TPA2054D4 powers up with the amplifiers disabled, muted, and the gain set to theminimum. To hear an output, enable and remove the mute for each channel, plus the gain toa higher value.

3. Follow these steps only if using a PC is both the music source and the computer on which theTPA2054D4 GUI is run.When using WinXP, if after initially installing the software, the PC does not play music out of theheadphone jack:

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2.1.4 Using the I

C Programming Function

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Operation

a. Display the Control Panel.b. Select the Sounds, Speech, and Audio Device item under the Control Panel.c. Click Sounds and Audio Device Properties link.d. Select the Audio tab.e. Verify that the Default device under Sound playback is the audio driver of the PC HW, not theUSBMODEVM TPA2054D4 GUI driver.f. Change the driver in the menu to the PC Audio HW driver.g. Click OK.

4. Click the HW Reset button to reset the device.5. Turn off Software Shutdown.6. Click the Speaker Output button to enable or disable speaker output.7. Click the HP Output button to enable or disable headphone output.a. Check/uncheck HP Left Mute to place headphone left output in/out of mute.b. Check/uncheck HP Right Mute to place headphone right output in/out of mute.8. Select input mode in the Channel Mode.9. Adjust the volume for both channels of the speaker amplifier by sliding the bar in Chan 1,Chan 2 orMono.

10. Adjust the headphone gain in HP Gain by sliding the bar.11. The speaker gain and headphone gain are displayed at Total Gain.12. Select the headphone limiter level by clicking the voltage limit.13. Select the headphone impedance in Load Resistance, the Headphone Limiter Power Level will bedisplayed.

14. I2C Status box reports the status of I

C communications. An error or failure has occurred if it turnsred.

15. Thermal box reports the status of thermal failure. A thermal fault has occurred if it turns red.

The GUI has a built-in I

C programming interface. It has a log feature to record the configurationselections made in the GUI.To use the I

C programming function:1. At the top left corner of the GUI, click File to access the I2C programming interface.2. To save the current register values in a script.a. Select Save Script button.b. Click the folder icon to navigate to the folder where the script is to be stored.c. Provide a name for the file and save as text (txt) format.d. Select OK to save.

3. To load the previously saved script to program the entire register file.a. Select Load Script button.b. Click the folder icon to navigate to the folder where the script text file is located.c. Select the desired filename.d. Click OK.e. Click Load button.

4. I2C interface can program individual register values of TPA2054D4. Select I2C Interface >> I2Caddress is xE0, which is the address of TPA2054D4. Device address is from 1 to 7, which is theregister address of TPA2054D4.5. To record all the changes made in the GUI and store the changes in a text file.a. Select Record Script button.

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2.2 Quick Start List When Connected to External I

C Controller

2.2.1 Evaluation Module Setup

GND

SCL

SDA

GND

External I C

Source

Operation

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b. Click the folder icon to navigate to the folder where the GUI changes are recorded.c. Provide a name for the file and save as text (txt) format.d. Click Record Off that toggles to Record On. The green light turns red to indicate active recording ofthe GUI changes.e. Click Exit button.f. Make changes in the TPA2054D4 software GUI.g. Select Record Script button.h. Click Record On that toggles to Record Off. The red light turns green to indicate the GUI changesare no longer recording.i. Click Exit button. All the changes are recorded in the selected text file that was named in the thirdstep.

The TPA2054D4EVM can be connected to existing circuits with I

C controls. Connections to the EVMmodule can be made using banana plugs for the power supply. The inputs accept standard RCA plugs.The output connection accepts standard 3.5-mm headphone plugs.

1. Install shunts in jumpers JP4. Remove shunts in JP2 and JP3 and connect I

C controls to JP3 asshown in Figure 6 .2. The two options to power DVDD:•Connect USB cable to supply 1.8V for DVDD and remove R17.•Disconnect USB cable. Remove JP1 and connect an external power supply (from 1.75 V to 1.95 V)at TP18 (to DVDD).

Figure 6. Connect I

C Controls to JP3

3. For all the other connections, follow the steps in Evaluation Module Setup .

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3 TPA2054D4EVM Schematic

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TPA2054D4EVM Schematic

Figure 7. TPA2054D4EVM Schematic

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4 TPA2054D4EVM PCB Layers

TPA2054D4EVM PCB Layers

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Figure 8. TPA2054D4EVM – Top Layer

Figure 9. TPA2054D4EVM – Layer 2

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