Texas Instruments TAS5441-Q1EVM, Руководство пользователя

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Introduction
3 SLOU528B – April 2020 – Revised June 2020
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Copyright © 2020, Texas Instruments Incorporated
TAS5441-Q1EVM User's Guide
1.1 Features
• Runs without I2C initialization
• Has a control GUI via USB
1.2 Description
The TAS5441Q1EVM showcases the TI TAS5441-Q1 analog input class-D closed-loop mono amplifier.
The EVM is usable as stand-alone platform with default I
2
C 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 I
2
C
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 TAS5441-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 TAS5441-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 TAS5441-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