Datasheet

TLV320AIC3110
SLAS647B –DECEMBER 2009–REVISED MAY 2012 www.ti.com
The TLV320AIC3110 has a short-circuit protection feature for the speaker drivers that is always enabled
to provide protection. If the output is shorted, the output stage shuts down on the overcurrent condition.
(Current limiting is not an available option for the higher-current speaker-driver output stage.) In case of a
short circuit on either channel, the output is disabled and a status flag is provided as a read-only bit on
page 1 / register 32, bit D0.
If shutdown occurs due to an overcurrent condition, then the device requires a reset to re-enable the
output stage. Resetting can be done in two ways. First, the device master reset can be used, which
requires either toggling the RESET pin or using the software reset. If master reset is used, it resets all of
the registers. Second, a dedicated speaker power-stage reset can be used that keeps all of the other
device settings. The speaker power-stage reset is done by setting page 1 / register 32, bit D7 for SPLP
and SPLM and by setting page 1 / register 32, bit D6 for SPRP and SPRM. If the fault condition has been
removed, then the device returns to normal operation. If the fault is still present, then another shutdown
occurs. Repeated resetting (more than three times) is not recommended, as this could lead to
overheating.
To minimize battery current leakage, the SPLVDD and SPRVDD voltage levels should not be less
than the AVDD voltage level.
The TLV320AIC3110 has a thermal protection (OTP) feature for the speaker drivers which is always
enabled to provide protection. If the device is overheated, then the output stops switching. When the
device cools down, the device resumes switching. An overtemperature status flag is provided as a read-
only bit on page 0 / register 3, bit D1. The OTP feature is for self-protection of the device. If die
temperature can be controlled at the system/board level, then overtemperature does not occur.
5.5.11 Audio Output Stage Power Configurations
After the device has been configured (following a RESET) and the circuitry has been powered up, the
audio output stage can be powered up and powered down by register control.
These functions soft-start automatically. By using these register controls, it is possible to control all four
output stages independently.
See Table 5-39 for register control of audio output-stage power configurations.
Table 5-39. Audio Output Stage Power Configurations
Audio Output Pins Desired Function Page 1 / register, Bit Value
HPL Power down HPL driver Page 1 / register 31, bit D7 = 0
HPL Power-up HPL driver Page 1 / register 31, bit D7 = 1
HPR Power-down HPR driver Page 1 / register 31, bit D6 = 0
HPR Power up HPR driver Page 1 / register 31, bit D6 = 1
SPLP / SPLM Power down left class-D drivers Page 1 / register 32, bit D7 = 0
SPLP / SPLM Power up left class-D drivers Page 1 / register 32, bit D7 = 1
SPRP / SPRM Power down right class-D drivers Page 1 / register 32, bit D6 = 0
SPRP / SPRM Power up right class-D drivers Page 1 / register 32, bit D6 = 1
5.5.12 Example Register Setup to Play Digital Data Through DAC and Headphone/Speaker
Outputs
A typical EVM I
2
C register control script is provided below to show how to setup the TLV320AIC3110 in
Playback Mode with f
S
= 44.1 kHz and MCLK = 11.2896 MHz.
# I2C Script to Setup TLV320AIC3110 in Playback Mode
# Key: w 30 XX YY ==> write to I2C address 0x30, to register 0xXX, data 0xYY
# # ==> comment delimiter
64 APPLICATION INFORMATION Copyright © 2009–2012, Texas Instruments Incorporated
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