Texas Instruments TAS5601 User manual

User's GuideSLOU219 – February 2008
TAS5601 Digital Power Amplifier With MC5601 Modulator
Kit
This manual describes the operation of the TAS5601EVM evaluation module from Texas Instruments.
Contents1 Purpose of This Document ................................................................................................. 32 Overview ...................................................................................................................... 32.1 TAS5601EVM and MC5601 Features ........................................................................... 43 Installation .................................................................................................................... 53.1 Software Installation ................................................................................................ 53.2 EVM Installation ..................................................................................................... 54 Using the EVM Software .................................................................................................... 74.1 Getting Started ...................................................................................................... 74.2 Setup Tab ............................................................................................................ 74.3 Volume Tab ........................................................................................................ 125 EQ/DRC Tool Installation.................................................................................................. 135.1 TI ALE Guide for TAS570x ....................................................................................... 135.2 Edit EQ Filter ....................................................................................................... 145.3 Edit and Generate DRC Data .................................................................................... 175.4 Save EQ/DRC/Alpha Data to File .............................................................................. 196 Jumpers and Control Utilities ............................................................................................. 206.1 Switches ............................................................................................................ 207 Board Layouts, Bill of Materials, and Schematics ..................................................................... 217.1 TAS5601EVM Board Layouts ................................................................................... 217.2 Bill of Materials .................................................................................................... 227.3 Schematics ......................................................................................................... 228 Related Documentation From Texas Instruments ..................................................................... 23
List of Figures
1 TAS5601EVM4 Printed-Circuit Board ..................................................................................... 32 EVM Controller Board (MC5601) .......................................................................................... 43 Complete System and EVM Signal Path Overview ..................................................................... 44 Setup Tab ..................................................................................................................... 75 Volume Tab ................................................................................................................... 86 EQ Viewer Tab ............................................................................................................... 97 DRC Viewer Tab ............................................................................................................. 98 EQ/DRC Demo Tab ........................................................................................................ 109 I
2
C Single Byte .............................................................................................................. 1110 I
2
C Multiple Byte ............................................................................................................ 1111 Volume Control Tab ........................................................................................................ 1212 Top Silk Screen View ...................................................................................................... 2113 Bottom Silk Screen View .................................................................................................. 21
List of Tables
1 Recommended Power Supplies ........................................................................................... 52 Bill of Materials for TAS5601EVM ....................................................................................... 22
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3 Related Documentation from Texas Instruments ...................................................................... 23
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1 Purpose of This Document
2 Overview
Purpose of This Document
This user's guide describes how to use the TAS5601 evaluation module (EVM) to evaluate performance ofthe TAS5601 device. The document contains the following.•Details of how to properly set up an MC5601 modulator kit.•Details of how to install and use the GUI to program the TAS5601
The TAS5601EVM evaluation module (EVM) demonstrates the TAS5601 device from Texas Instruments.
The TAS5601 contains a class-D audio power amplifier. For detailed information about the TAS5601device, review the device data sheet (SLAS585) . The TAS5601 is designed to drive two 8- Ωloudspeakersat up to 20 W per channel (10% THD+N) in BTL configuration from an 18-V supply. Figure 2 shows apicture of the MC5601 modulator kit. The MC5601 provides power, data, and I
2
C control to theTAS5601EVM board.
The EVM software with its graphic user interface facilitates evaluation by providing access to the TAS5601registers through a USB port. Refer to the Using the EVM Software section for further details.
Figure 1 shows a picture of the TAS5601EVM evaluation module.
Figure 1. TAS5601EVM4 Printed-Circuit Board
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2CH Analog Input
from other source /
Digital out
SPDIF/
Optical, Coax TAS5601EVM
Left
Right
I2S
MC5601
2.1 TAS5601EVM and MC5601 Features
Overview
Figure 2. EVM Controller Board (MC5601)
The TAS5601EVM is a complete 2-channel digital audio amplifier system. Also included in the kit is aMC5601 board that includes a USB interface, a digital input (SPDIF), analog inputs via the ADC, and otherfeatures like a mute function and power down. The TAS5601EVM can be used as a stand-alone board bywiring it into a system or it can be connected to the MC5601 board for a complete evaluation platform.
Figure 3. Complete System and EVM Signal Path Overview
•Self-contained protection systems and control pins•USB interface•Standard I
2
S data input using an optical input•Analog input through analog to digital converter•Double-sided plated-through PCB, 2-oz copper
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3 Installation
3.1 Software Installation
3.2 EVM Installation
3.2.1 PSU Interface
3.2.2 Loudspeaker Connectors
Installation
•Access to control signal gain and data format through EVM-software graphic user interface (GUI)
This section describes the software and EVM installation.
Execute the GUI install program setup.exe, found in the TAS570x GUI directory in the provided compactdisc. Once the program is installed, the program group and shortcut icon is created in Start →Program→Texas Instruments Inc →TAS570x Interface.
The following are the basic tools for the initial EVM power up.•5 V, 1 A power supply (VIN)•10–26 V, 4 A power supply (PVDD)•Banana-style test leads for power supplies and speakers•Optical cable for SPDIF interface based on signal source•Coaxial cables with phono plugs for analog audio if digital audio is unavailable•USB cable•EVM software•Two 8- Ωspeakers or loads
The following sections describe the TAS5601EVM board in regards to power supply (PSU) and systeminterfaces.
The TAS5601EVM module is powered by two power supplies connected to the MC5601 controller board:a 5-V power supply (VIN) and a 10-V to 26-V (PVCC) power supply. The 3.3-V level is generated on theboard by a voltage regulator from the 5-V supply.
Note: The power-supply cable length must be minimized. Increasing the length of the PSU cableincreases the distortion of the amplifier at high output levels and low frequencies.
Table 1. Recommended Power Supplies
Description Voltage Limitations Current(8 Ωload) Recommendations
System power supply 5 V 1 AOutput power stage supply 10–26 V 4 A
(1)
(1)
The rated current correspond to 2 channels full scale.
CAUTION
In BTL connection, both positive and negative speaker outputs are floating andmay not be connected to ground (e.g., through an oscilloscope).
For BTL:
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3.2.3 USB Interface
3.2.4 Digital Audio Interface SPDIF (J1/OPTO)
3.2.5 ADC Interface
3.2.6 Board Power-Up General Guidelines
Installation
•Connect the left speaker wires to the corresponding metal binding posts marked J2 and J4 on theTAS5601EVM board.•Connect the right speaker wires to the corresponding metal binding posts marked J6 and J8 onTAS5601EVM board.
For SE:•Connect the four sets of speaker wires to the pairs J2-J3, J4-J5, J6-J7, and J8-J9.
The TAS5601 registers are accessed through I
2
C bus lines SDA and SCL. The USB circuit and USBconnector on the MC5601 board facilitates the connection between a host computer and the device. TheEVM USB circuit is powered by the 5-V USB line of the host PC, and is independent of the power suppliesavailable on the board. The USB device used is a TAS1020B from Texas Instruments.
The Digital Audio Interface accepts digital audio data using the I
2
S protocol. See the TAS5706 data sheetfor more information.
The OPTO connector is the SPDIF interface on the MC5601 board. When the optical cable is connectedand the signal source is powered up, verify that the SPDIF lock indicator (blue LED3) illuminates,confirming that there is a viable signal available to the device. Install the four clock/data jumpers acrossthe middle pin and the pin marked SPDIF.
For detailed information on how the data and clocks are provided to the TAS5601, see the schematicappearing at the end of this document and the DIR9001 device data sheet .
In the absence of a digital signal source, the PCM1808 ADC may be used to convert an analog audiosignal to a digital signal to the TAS5601. The DIR9001 still provides clock signals to the ADC in thisprocess. The DIR9001 oscillator frequency (Y2) determines the sampling frequency in the absence of adigital signal. If the OSC frequency is 24 MHz, the sampling frequency is set at 96 kHz; if OSC is set at 12MHz, the sampling frequency defaults to 48 kHz when there is no signal on the SPDIF input terminals. A12-MHz crystal is installed on the MC5601 board. The ADC is an additional feature of this board toprovide flexibility in sourcing an audio signal to the TAS5601. Review the PCM1808 data sheet for adetailed description of the ADC on this EVM. Install the jumper on SDW2 across the middle pin and thepin marked ADC.
Connect the MC5601 and the TAS5601EVM boards by locating pin 1 on each board, indicated by a smallwhite triangle. The TAS5601EVM plugs into the MC5601 board. Pin 1 on each board should be connectedto each other.
Install the EVM software on the PC before powering up the board. After connecting the loudspeakers orother loads, power supplies, and the data line, power up the 5-V power supply first; then power up thePVDD power supply. It is recommended initially to set the PVDD level to 10 V, then ramp it up to 20 V toverify cable connections.
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4 Using the EVM Software
4.1 Getting Started
4.2 Setup Tab
Using the EVM Software
The EVM software provides access to the TAS5706 configuration and status registers through a GUIwindow with 7 tabs for the various EVM parameters.
Open the zip file (.zzp) on the installation CD shipped with the EVM. Extract the files and run thesetup.exe file to install the EVM software. After the GUI is installed, power up the board, and connect theUSB cable. A new-hardware alert should appear at the bottom right hand corner of the display. If the USBdriver is not installed, follow the instructions on the USB Wizard to install the USB driver.
After the EVM software is installed and the EVM powered up, the status bar should be green. Clicking onthe setup tab displays the window shown in Figure 4 .
Then perform the following steps.1. Select the device TAS5706.2. Select 2-Channel BTL (BD mode).3. Click the Initialize button, and uncheck All Channel Shutdown box.4. Select Volume tab. Unmute master volume and slide the volume bar to preferred volume setting (seeFigure 5 ).
Figure 4. Setup Tab
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4.2.1 All Channel Shutdown
4.2.2 Advanced Features : EQ and DRC
4.2.2.1 EQ Loading and Viewing
4.2.2.2 DRC Coefficient Loading
Using the EVM Software
Figure 5. Volume Tab
System comes up with all channel shut down asserted.
To exit All Channel Shutdown, select Setup Tab, unselect All Channel Shutdown.
EQ and DRC can be designed in ALE (Automatic Loudspeaker Equalization tool).See the EQ/DRC ToolInstallation section that appears later in this document. The filters designed in ALE can be saved into afile. Load the ALE output using File -> Load the ALE File and select the ALE output file . Select Autobankswitch ON in the EQ tab. The EQ and DRC parameters can be viewed by selecting the EQ viewer or DRCtabs. Coefficients are loaded into DAP in the autobank switch only when a legitimate sample rate isapplied. EQ and DRC are loaded before the step described in Section 4.2.1 .
EQ coefficients can be generated using ALE. (See ALE User's Guide.) Once EQ coefficients aregenerated, they can be loaded into the part using File →Load ALE using the TAS570x GUI.
DRC coefficients can be generated using ALE and can be loaded using File →Load ALE. Normally, bothEQ and DRC coefficients are created and saved as a single file from ALE. DRC1 (satellite channels) andDRC2 (subchannel) can be enabled and disabled using the toggle button in this tab.
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Using the EVM Software
Figure 6. EQ Viewer Tab
Figure 7. DRC Viewer Tab
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4.2.3 EQC/DRC Demo
4.2.4 I
2
C Tab
Using the EVM Software
This tab is used to compare different settings. Multiple EQ files can be loaded and switched back and forthfor listening purposes to select the golden filters.
Figure 8. EQ/DRC Demo Tab
Clicking on the I
2
C Interface tab displays the window shown in Figure 9 . This window can be used toperform single or multiple-byte I
2
C accesses.
To INITIALIZE, use File -> Load Script and select the init file (see the attachedTAS5601_ADmode_Initialize.ini; also attached is the BDMode initialize file).
Also, by writing the device address and selecting NumBytes and also selecting Single Byte/Multiple Byte,data can be written or read from the device.
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4.2.4.1 I
2
C Writes and Reads
Using the EVM Software
Data can be written to or read from the device. Single- or multiple-byte write/read is determined by thesubaddress. If less than 0x20, single-byte access is required. Otherwise, multiple-byte access is used.
Figure 9. I
2
C Single Byte
Figure 10. I
2
C Multiple Byte
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4.3 Volume Tab
Using the EVM Software
Select the Volume tab. Unmute the Master volume. Click on the 0 db button.
Figure 11. Volume Control Tab
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5 EQ/DRC Tool Installation
5.1 TI ALE Guide for TAS570x
5.1.1 Overview
5.1.2 Select Device
EQ/DRC Tool Installation
If you want to use the Texas Instruments ALE tool to create filters for the EQ and DRC parameters, unzipthe ale.zip file from the ALE directory located on the provided compact disc into your C:\\USERDATA\directory.
You can open the ALE tool by double-clicking on the file:C:\\USERDATA\ale\Rel5.4\Release\Source\AutoSpeakerEq.exe.
Once the TI ALE program starts, users can follow the next sections for instructions on how to set up,generate, and save the TAS570x EQ coefficients, Dynamic Range Compression data, and Alpha Filterdata. For technical data related to filters, see the TAS570x data sheet.
Click on Device pulldown menu, and select the TAS570X item as in the following illustration.
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5.2 Edit EQ Filter
EQ/DRC Tool Installation
Click on Edit pulldown menu, and select Edit Filter Parameters as shown in the following illustration.
An EQ Filter dialog box appears as shown in the following illustration. Users then enter EQ-related data.Once finished, close the dialog box.
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5.2.1 Display the Graph
EQ/DRC Tool Installation
For channels 1 and 2, users can create up to seven EQ data sets. For channel 6, users can create up tofour EQ data sets. See the TAS570x data sheet for detailed technical information related to filters.
To display the graph, select the Draw Filters icon as shown in the following figure. The graph is drawn anddisplayed in the window box
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5.2.2 Generate EQ Filter Data
EQ/DRC Tool Installation
Click on the Edit pulldown menu, and select Generate Device Data as shown in the following illustration.
A Select Channel dialog box appears as shown in the following illustration.
Users can select to which channel the EQ filter data is applied. Once the channel is selected, another boxappears and displays the EQ Filter data for the selected channel. Click the Close button to close thedisplay.
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5.2.3 Save EQ Data to File
5.3 Edit and Generate DRC Data
EQ/DRC Tool Installation
Click on the File pulldown menu, and select Save Device Program Data J as shown in the followingillustration.
Click on the pulldown menu, and select Dynamic Range Compression for TAS570X as shown in thefollowing illustration.
A new window appears along with the DRC dialog box. Users now can edit data for the DRC as shown inthe following illustration.
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5.3.1 Edit and Generate Alpha Filter Data
EQ/DRC Tool Installation
To see the drawing with the new data, click on the Apply button. The DRC combination box allows usersto select to which DRC, 1 or 2, the data is applied. To save the data for the selected DRC, 1 or 2, click onthe Save Data button.
Continuing from the previous section, click on the Design pulldown menu, and select TAS570X AlphaFilter as shown in the following illustration.
An Alpha Filter dialog box appears as the following illustration shows that allows users to edit andgenerate Alpha Filter data. Users can generate Alpha Filter data for DRC1 or DRC2 by using the SelectDRC box.
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5.3.2 Save DRC Data to File
5.4 Save EQ/DRC/Alpha Data to File
EQ/DRC Tool Installation
When finished generating Alpha Filter data for the DRCs, the user clicks the OK button to close the dialog.
To save the DRC data only, click the File pulldown menu, and select the Save As .DRC570X File item asshown in the following illustration. The File dialog box appears to allow users to save the DRC data.
To save all data including EQs, DRCs, and Alpha Filters, click the File pulldown menu, and select Savethe TAS570X EQs/DRCs File item as shown in the following illustration. The File dialog box appears toallow the user to save all data.
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6 Jumpers and Control Utilities
6.1 Switches
Jumpers and Control Utilities
Reset is an active-low function. Pressing the master reset switch (S2) resets the TAS5601.
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