Texas Instruments TAS5424 Manuel utilisateur

TAS5414 and TAS5424 Evaluation Module

User's Guide

Literature Number: SLOU202June 2007

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Contents
1 Quick-Start Guide ........................................................................................................ 51.1 Overview .......................................................................................................... 51.2 Software Installation ............................................................................................. 51.3 Connections ....................................................................................................... 51.4 Initial Power Up ................................................................................................... 61.5 Basic Graphical User Interface Controls ...................................................................... 62 EVM Description ......................................................................................................... 62.1 Description of Input .............................................................................................. 62.2 Description of Outputs ........................................................................................... 72.3 Controls ............................................................................................................ 72.4 Indicator Description ............................................................................................. 72.5 Clock Dither Circuit .............................................................................................. 83 Graphical User Interface .............................................................................................. 83.1 Introduction ....................................................................................................... 83.2 Software Installation ............................................................................................. 83.3 Hardware Installation ............................................................................................ 83.4 Using the GUI..................................................................................................... 94 Board Layouts .......................................................................................................... 115 Bill of Materials and Schematics ................................................................................. 215.1 TAS5414EVM3R1 and TAS5424EVM3R1 Bill of Materials ............................................... 215.2 TAS5414EVM3R1 and TAS5424EVM3R1 Schematics ................................................... 236 Related Documentation from Texas Instruments ........................................................... 23
Important Notices ............................................................................................................... 24
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List of Figures

1 End Panel for Input Connections .......................................................................................... 62 Main Window ................................................................................................................. 63 Wiring Harness for Power and Speaker Connections .................................................................. 74 EVM System Connection Diagram ........................................................................................ 85 Various Panels of Main Window ........................................................................................... 96 TAS5414EVM3R1 Top Assembly Layer ................................................................................ 117 TAS5414EVM3R1 Top Composite Layer ............................................................................... 128 TAS5414EVM3R1 Top Copper Layer ................................................................................... 139 TAS5414EVM3R1 Top Silkscreen Layer ............................................................................... 1410 TAS5414EVM3R1 Bottom Copper Layer ............................................................................... 1511 TAS5424EVM3R1 Top Assembly Layer ................................................................................ 1612 TAS5424EVM3R1 Top Composite Layer ............................................................................... 1713 TAS5424EVM3R1 Top Copper Layer ................................................................................... 1814 TAS5424EVM3R1 Top Silkscreen Layer ............................................................................... 1915 TAS5424EVM3R1 Bottom Copper Layer ............................................................................... 20

List of Tables

1 Bill of Materials for TAS5414EVM3R1 ................................................................................... 212 Bill of Materials for TAS5424EVM3R1 ................................................................................... 22

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1 Quick-Start Guide

1.1 Overview

1.2 Software Installation

1.3 Connections

User's GuideSLOU202 – June 2007

TAS5414 and TAS5424 Evaluation Module

The TAS5414/TAS5424 evaluation module (EVM) is intended to be used to demonstrate the device'scapabilities. All the device’s features can be accessed through the hardware and the software graphicaluser interface (GUI) supplied. This user's guide contains a description of the EVM and the GUI. Includedare the EVM schematic, bill of materials, and the board layout.

This section provides a guide to set up and power up the EVM without the details in its operation. Fora more detailed operation, read the complete guide.

The EVM consists of single printed-circuit board (PCB) mounted inside a metal chassis for EMC testing.The EVM must have an I

C controller board to function. The USB-to-I

C controller PCB connects to apersonal computer (PC) through an USB cable. The EVM connects to the I

C controller PCB through thesupplied 6 pin DIN cable included in the EVM package. The PC needs the graphical user interface (GUI)software to control the EVM. The GUI, this document, and any necessary documents are all on theincluded CD.

The software is located on the CD that is included with the EVM package. Run the setup.exe programlocated in the TAS54x4 GUI directory to install the GUI. For more details, read chapter 3.

The connections are for an analog signal at the input, speaker loads, power, and I

C. The audio inputs aremade through the four RCA connectors. The I

C control signals are made through the 6-pin DINconnector. The power connectors and speaker connectors are made using the 10-pin connector.

The basic connections are: PVDD or power is connected to the EVM through the supplied 10-pinconnector with the twisted red and black wires. The speakers or loads are connected through the same10-pin connector with the twisted red and white wires. The 6-pin DIN is connected to the I

C-to-USBadapter board. See the Figure 1 for details.

Adobe, Acrobat, Reader are trademarks of Adove Systems Incorporated.Windows is a trademark of Microsoft Corporation.

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1.4 Initial Power Up

1.5 Basic Graphical User Interface Controls

2 EVM Description

2.1 Description of Input

2.1.1 Analog Inputs

EVM Description

Before applying power, check to make sure the Standby Control switch is in the Standby ON position, asshown in Figure 1 .

Figure 1. End Panel for Input Connections

Apply power; the STANDBY and MUTE LEDs should be on. The Fault LED may also be on, but notnecessarily. This indicates that the unit is powered, and the TAS5414 or TAS5424 is in Standby Mode andMute Mode. The fault indicated is an undervoltage fault during power up. This is normal and is cleared byreading the I

C Register 0x00, but to quickly clear the fault, use the Standby switch. Switch it to the OFFposition and then back to ON. This resets the device into its default state and clears the power-up fault.

This is the main window for the graphical user interface (GUI). The default state for the TAS5414 andTAS5424 is mute. To unmute, click the Play All button at the top left of the window. To mute, click theMute All button.

Figure 2. Main Window

Analog inputs are provided for either balanced or unbalanced depending on which device is in the EVM.Both are connected to the EVM through the four RCA jacks. The unbalanced inputs have the shield of theRCA connected to ground. The balanced inputs have the plus {+) input on the center pin of the RCA andthe minus (–) input on the shield. The balanced ground can be connected to the chassis or Power- (GND).

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2.1.2 Power

2.2 Description of Outputs

2.2.1 Speaker Connections

2.3 Controls

2.3.1 Standby

2.4 Indicator Description

EVM Description

The I

C connections are made through a 6-pin DIN connector. The provided cable and adapter PCBconnect the EVM to the host PCB. The adapter PCB is an I

C-to-USB converter, which is a HID deviceand is automatically recognized by the PC when connected. Therefore, no drivers are needed.

The EVM requires one dc power connection. The connection is made through a 10-pin suppliedconnector. The black wire is ground and the red wire is connected to PVDD which can be 8 to 21.5 Vdc.The connector is Samtec part number IPBD-10-S.

The four speaker connections are located at the one side of the box. The supplied 10-pin connector withtwisted red and white wires should be terminated to a speaker load or resistive load. The red wirecorresponds to the plus {+) output and the white wire corresponds to the minus (–) output.

Figure 3. Wiring Harness for Power and Speaker Connections

Do not connect any of these outputs to ground. The TAS5414 and TAS5424 have full bridged outputs;connecting to ground triggers a fault.

The outputs can be paralleled by connecting the plus {+) of one channel to the plus {+) of the otherchannel. The minus (–) connection of one channel and the minus (–) of the other channel must beconnected also. When paralleling channels, the input signals must be the same and the gain must be setthe same. The gain is set through I

The Standby switch is located next to the 6-pin DIN I

C input connector. The Standby ON position can bedetermined by the toggle being downwards. In this position, it forces the TAS5414 and TAS5424 into thestandby mode. This is the same as a Power On Reset or POR. This shuts down the device and the I

C isdefeated(??).

When the switch is moved to the Standby OFF position, the TAS5414 and TAS5424 are put into theirdefault power-up mode. The I

C registers are set to their defaults. The amplifier output is in Hi-Z mode.

Four LED indicators are located on the chassis next to the Standby switch. One power indicator is locatedon the PCB; it is for the 3.3-Vdc supply. The 3.3-V supply is needed for the LEDs and the Standby circuit.The other four LEDs indicate the four non-I

C output pins, FAULT, MUTE, CLIP_OTW, and STANDBY.Fault and CLIP_OTW signals are also routed to the 6-pin DIN for the GUI. In normal play mode, these fourLEDs should not be illuminated.

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2.5 Clock Dither Circuit

PC USB to I2C

Adapter PCB

USB

Cable

Audio Source

TAS5424 EVM3

TAS5414 EVM3

6 Pin DIN Cable

4 RCA Cables

Power Supply

User supplied loads

or speakers

Spkr

Cables

3 Graphical User Interface

3.1 Introduction

3.2 Software Installation

3.3 Hardware Installation

Graphical User Interface

The EVM includes a clock dithering circuit for EMI mitigation. The dither circuit can be disconnected fromthe TAS5414 or TAS5424 device by removing the jumper JP1 on the PCB. The clock frequency changes±5% in 50 ms. This was chosen to avoid interference with the audio signal. This circuit can aid in resolvingpotential AM interference issues.

Figure 4. EVM System Connection Diagram

The TAS5414/TAS5424 GUI software is designed to demonstrate the features of the TAS5414 andTAS5424. It is also able to assist the applications programmer in generating and saving the desiredoperating characteristics.

The TAS5414 GUI has a feature where it can log the I

C data being sent to and received from the device.This can be helpful to the programmer in understanding the I

C commands needed for proper function.

The GUI software is located on the CD-ROM provided with the EVM. Run the setup.exe program locatedin the TAS54x4 GUI directory on a personal computer (PC) with the Windows™ OS to install the GUI. ThePC should connect to the Internet as it needs to download the Microsoft dotnet 2.0 environment, if it is notalready on the PC. If needed a copy of the Microsoft dotnet 2.0 setup file is on the CD-ROM.

In the EVM package is a small PCB labeled USB2IIC2 on the PCB. This is the USB-to-I

C converter tocommunicate to the EVM. Connect the USB cable to the PC and the PCB. Connect the 6-pin cable to theconnector labeled I2C on the converter PCB to the 6-pin connector on the EVM. Power for this card isprovide through the USB connection. The PC should automatically connect to the USB connected PCB.

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3.4 Using the GUI

3.4.1 The Main Window

3.4.1.1 TAS5414 Control Panel

3.4.1.2 Device Status Panel

Graphical User Interface

Figure 5. Various Panels of Main Window

The Control Panel consists of six buttons that perform basic functions on all four channels.

Reset: This button sends a software reset to the device via I

C. It is equivalent to sending a 9F to register0x0C. All the I

C defaults are restored.

Read Faults: This button reads the four fault registers 0x00 through 0x03 and reports the data to theDevice Status Panel

Load Diag: This button runs a script to perform the built-in load diagnostics. It places all four channelsinto Hi-Z mode, runs the load diagnostic, and reports any faults to the Device Status Panel. The detailsare displayed for each channel.

Play All: This button uses I

C to run a script to place all four channels into play mode. An optionalenhanced play version is in the Options Menu. (See Options Menu.)

Mute All: This button uses I

C to mute all four channels. All channels switch at 50% duty cycle, and nosignal passes from the input to the output.

Hi-Z All: This button places all four channel outputs into a high-impedance state. The device is first placedin mute. The Low-Low state is then invoked. The Low-Low state connects current sources to/from theoutput to ground to provide a current path for any stored energy in the speaker. Then, the outputs areplaced in Hi-Z.

Device Panel Title: The title at the top of the Device Status Panel shows with which device the GUI is setto communicate. The four options are: Master (shown in Figure 5 ), Slave1, Slave 2, and Slave 3. This ischanged in the menu item Device Select

Global: This provides fault feedback from the device. If a fault occurs, a red Fault is indicated. Read thefault detail in the register 0x00 and 0x01.

Temperature: This has not been implemented as yet

Channel 1-4: These four items provide individual channel output states. Hi-Z, Mute, Low-Low, and Play.The gain setting is displayed with the play indication.

Fsw: This item provides the switching frequency of the outputs.

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3.4.1.3 Connection Status Panel

3.4.1.4 I2C Log Panel

3.4.1.5 Register Overview Panel

3.4.1.6 Register Detail Panel

3.4.1.7 Menu Bar

Graphical User Interface

Two LED indicators provide connection status.

USB: This indicator is Gray when there is no USB connection to the USB2II2C PCB. The I2C LED is off.The indicator is Green when a connection is good.

I2C: This indicator is Red when there is a USB connection, but no I2C connection. A Green indicatorshows that I

C communication is functioning properly. If the LED is off, then there is no USB connection.

All the I

C commands that are sent or received by the TAS5414 and TAS5424 are shown in this panel.The displayed data can be copied to the clipboard for a programming aid. This type of information can becontrolled by the I2C Log menu item. An Rindicates a value read from the device and an Windicates avalue sent to the device. Valuable comments also are provided. (See I2C Log Menu.)

This panel provides the hexadecimal (hex) data for each I2C register. The hex data control registers canbe directly changed here and sent to the device with the Apply button. Any changes made to the data willbe cleared by clicking the Cancel button. The Register Detail Panel is changed by clicking on the Registeror on it hex value.

This panel provides a detailed view of each register. By clicking on a register in the Register OverviewPanel, the details of that register are shown. Each bit has its description and its value shown by thecheckbox. A checkbox with a check mark indicates a logical 1and an unchecked checkbox indicates alogical 0. Changes to each bit can be made by clicking on the checkbox. The changes are sent to thedevice by clicking on the Apply button in the Register Overview Panel.

File: In this menu option, the Exit function can be found at the bottom of the drop-down menu.

Device Select: The I2C device select value can be changed in the Menu. For the EVM use the defaultvalue which is Master.

Macros: In this menu option, macros can be used.Custom Macros: This is not yet implementedPreloaded macros: This menu option provides a list of built-in macros to perform typical I

C routines.

Options: The option to have the enhanced turn-on script or not is selected in this menu. The enhancedturn-on options wait for the device to fully transition from Hi-Z to Mute by reading register 0x06 until muteis enabled. This ensure that the device is in Mute before transitioning to play. This provides an absolutemethod of pop and click free turn-on.

I2C Log: The I2C Log Panel controls are located in this menuLog Enabled: When selected, this menu option shows the I2C Log Panel. When disabled, the I2C LogPanel is hidden.Show I2C Reads: When selected, this menu option shows the value read from the device. These areindicated with an R.Show I2C Writes: When selected, this menu option shows the values that are sent to the device.These are indicated with a W.Show Comments: When selected, this menu option shows the comments. The comments are notshown when this item is not selected.Clear: This menu option clears the log data. The data is lost.

Help: This menu option provides three items:About: This provide the revisions level of the software.

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