Texas Instruments TAS5411EVM, User Manual, Page: 2 / 16

Hardware Overview
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1.1 TAS5411EVM Features
• Runs without I
2
C initialization
• Has GUI control via USB port
• Passes EMC CISPR 25, class 5
1.2 TAS5411EVM Gain
The gain setting for TAS5411-Q1 device is I
2
C programmable. The four gain options are 20 dB, 26 dB, 32
dB, and 36 dB. Set the gain by modifying I
2
C control register 0x03. By default, the gain is 26 dB.
1.3 TAS5411EVM PWM Switching Frequencies
The PWM switching frequency is I
2
C programmable. The two f
(SW)
options are 400 kHz and 500 kHz.
Programming the frequency in control register 0x03 is via the GUI and IIC2USB-2 board. By default, f
(SW)
is 400 kHz.
1.4 TAS5411EVM SpeakerGuard™ Protection Circuitry
The SpeakerGuard protection circuitry is programmable for different voltage levels. Programming the
levels in control register 0x03 via the GUI and IIC2USB-2 board. 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 26-dB 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-V peak
output.
— — 1 0 1 — — — SpeakerGuard protection circuitry is set to 11.8-V peak
output.
— — 1 0 0 — — — SpeakerGuard protection circuitry is set to 9.8-V peak
output.
— — 0 1 1 — — — SpeakerGuard protection circuitry is set to 8.4-V peak
output.
— — 0 1 0 — —- — SpeakerGuard protection circuitry is set to 7-V peak
output.
— — 0 0 1 — — — SpeakerGuard protection circuitry is set to 5.9-V peak
output.
— — 0 0 0 — — — SpeakerGuard protection circuitry is set to 5-V peak
output.
0 0 — — — — — — Set gain to 20 dB.
0 1 — — — — — — Set gain to 32 dB.
1 1 — — — — — — Set gain to 36 dB.
2 TAS5411EVM User's Guide SLOU431 – November 2015
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