Texas Instruments TAS5431-Q1EVM User manual

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TAS5431-Q1EVM User's Guide
User's Guide
SLOU529A–April 2020–Revised June 2020
TAS5431-Q1EVM User's Guide
Trademarks
Purepath, SpeakerGuard are trademarks of Texas Instruments.
All other trademarks are the property of their respective owners.
1 Introduction
TheTAS5431-Q1 evaluation module (EVM) is intended to demonstrate the capabilities of the TAS5431-Q1
device. All the device features can be accessed through the hardware and the software graphical user
interface (GUI) which is supplied. This user's guide contains a description of the EVM and the GUI. The
schematic, bill of materials (BOM), and board layout are included.

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Figure 1. TAS5431-Q1 EVM

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1.1 Features
• Runs without I2C initialization
• Has a control GUI via USB
1.2 Description
The TAS5431Q1EVM showcases the TI TAS5431-Q1 analog input class-D closed-loop mono amplifier.
The EVM is usable as stand-alone platform with default I2C register settings. The EVM runs in default I2C
register settings, without the need of initialization The EVM can also work with the Purepath™ Console
(PPC3) graphical user interface plug-in for programming the I2C register settings.
2 Settings Via I2C
The default values in the I2C registers may not be appropriate for your system design. Use the PPC3 user
interface to change the register settings to meet the system needs.
2.1 TAS5431-Q1 Gain
The gain setting for the device is I2C programmable. The four gain options are 20 dB, 26 dB, 32 dB, and
36 dB. Set the gain by modifying I2C control register 0x03. By default, the gain is 26 dB.
2.2 TAS5431-Q1PWM Switching Frequencies
The PWM switching frequency is I2C programmable. The two f(SW) options are 400 kHz and 500 kHz.
Programming the frequency in control register 0x03 is via the GUI. By default, f(SW) is 400 kHz.
2.3 TAS5431-Q1SpeakerGuard™ Protection Circuitry
The SpeakerGuard™ protection circuitry is programmable for different voltage levels. Programming the
levels in control register 0x03 via the PPC3 GUI. The control register shows the default value for the
SpeakerGuard protection-circuitry voltage level.
Table 1. Control Register
D7 D6 D5 D4 D3 D2 D1 D0 Function
0 1 1 1 1 0 0 0 26dB gain, f(sw) set to 400 kHz, SpeakerGuard protection circuitry is set to maximum
voltage
- - - - - - - 1 f(sw) set to 500 kHz
- - - - - 1 1 - RESERVED
- - 1 1 0 - - - SpeakerGuard protection circuitry is set to 14 Vpeak output
- - 1 0 1 - - - SpeakerGuard protection circuitry is set to 11.8 Vpeak output
- - 1 0 0 - - - SpeakerGuard protection circuitry is set to 9.8 Vpeak output
- - 0 1 1 - - - SpeakerGuard protection circuitry is set to 8.4 Vpeak output
- - 0 1 0 - - - SpeakerGuard protection circuitry is set to 7V peak output
- - 0 0 1 - - - SpeakerGuard protection circuitry is set to 5.9 Vpeak output
- - 0 0 1 - - - SpeakerGuard protection circuitry is set to 5 Vpeak output
0 0 - - - - - - Set Gain to 20 dB
0 1 - - - - - - Set Gain to 32 dB
1 1 - - - - - - Set Gain to 36 dB

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3 TAS5431Q1 EVM Setup
Hardware requirements
• Computer running Windows 7, 8, or 10
• Power supply: 5–18 VDC
• Speakers and cable (not-provided)
• USB cable (not-provided)
• Audio source: Differential audio source preferred, single ended input can be used.
4 Software Overview
4.1 PurePath™ Console 3 (PPC3) Access and Description
The PPC3 is a server-based tool. Access can be requested on
http://www.ti.com/tool/PUREPATHCONSOLE.
Once approval is given, go to www.ti.com/mysecuresoftware to download the install file. After login, the
user will see a webpage with a list of software products available for download. Access the PurePath
Console software and download it. Run the install program. Also, download the PPC3 User Manual
(SLOU408). After signing into the PPC3, the user will see the Home Window, similar to the one shown in
Figure 2
The proper plug-in needs to be installed. Click on the TAS5431 and TAS5441 box. The installation window
pops up, then click "Install". It shows that it is loading.
Figure 2. PPC3 Window

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The TAS5431 and TAS5441 box moves to the Installed Apps section. Click on the box and the plugin
loads.
Figure 3. Installing the Plug-in or App

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4.2 Using the PPC3 Plugin
When the TAS5431 and TAS5441 PPC3 is launched, the Home Window is shown. If the EVM is powered
on and the USB is connected to the PC, the Home Window displays “Connect” box in the bottom left hand
corner. If the EVM is not powered on or the USB is not connected, only “TAS5431 and TAS5441 – Offline”
is displayed.
Figure 4. Home Window

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There are two windows available with the TAS5431 and TAS5441 PPC3 Home Window: Register Map
Window and Device Monitor and Control Window.
The Register Map window will indicate the current settings off all the registers in the TAS5431-Q1. The left
pane show the individual registers. The right pane shows the description of each bit in the chosen register.
The control register values can be changed from this window.
Figure 5. Register Map Window

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Click on the Device Monitor and Control Box on the Home Window to display the Device Monitor and
Control Window. This window is a graphical representation of the register map. The "Controls" panes can
be changed and the other panes indicated the values in the registers. The Latch and Live toggle buttons
will allow for the Output Status, Protection and Load Diagnostics to be static (Latch) or dynamic (Live). In
Live mode the I2C registers are being read continuously to refresh the panes.
Figure 6. Device Monitor and Control Window
5 TAS5431Q1EVM Start Up
This section describes the start-up procedure. Have the equipment and accessories listed on the first
page of this document available.
5.1 TAS5431Q1EVM Setup
Hardware and software connections:
• Desk top or laptop PC running Windows . Open PPC3 GUI.
• Connect 14.4 VDC PSU to TAS5431-Q1 EVM
• Connect speakers or resistive loads to TAS5431-Q1 EVM
• Connect USB micro cable from PC to the EVM
• Set the switches (STANDBY, MUTE) to normal positions
• Turn on the PSU
• Audio source:
• At this point, 3.3 V LED, and USB-LOCK LED are on.
• On the PPC3 window, launch TAS5441 and TAS5431 plugin
• The audio can be streamed now to the speakers.

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6 Board Layouts, Bill of Materials, and Schematics
6.1 TAS5431Q1EVM Layouts
Figure 7. Top Side

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Figure 8. Bottom Side