Texas Instruments TAX5-Q1 Series Application Note

www.ti.com
Application Note
Dynamic Voltage and Temperature Tracking Based Limiter
in TAX5XXX-Q1
Daveon Douglas
The TAx5xxx-Q1 family of audio converters are used in automotive applications that can experience exposure
to high temperature conditions and sudden fluctuations in battery supply voltage (VBAT). The TAx5xxx-Q1
generation of Texas Instruments' audio converters introduces a Distortion Limiter, Brown-out Protector, and
Thermal Foldback feature that monitors battery voltage and die temperature levels. This monitor function helps
protect the device from these adverse factors by automatically attenuating the output signal.
The Distortion Limiter reduces the peak of the output signal and the Brown-out Protector applies a constant
gain reduction to the output signal as a function of supply voltage. In addition,Thermal Foldback automatically
attenuates the output signal, by reducing the gain, if the temperature of the die exceeds a programmable limit
while audio is still present at the output.
The Distortion Limiter, Brown-out, and Thermal Foldback features are algorithms within the limiter bank of
the DAC signal chain present in TAx5xxx-Q1 devices. This application note describes how to configure these
features for the following devices:
• TAC5411-Q1
• TAC5412-Q1
• TAC5311-Q1
• TAC5312-Q1
• TAC5212-Q1
• TAC5211-Q1
• TAC5111-Q1
• TAD5212-Q1
SLAAEI4 – AUGUST 2024
Submit Document Feedback
ABSTRACT
Dynamic Voltage and Temperature Tracking Based Limiter in TAX5XXX-Q1
Copyright © 2024 Texas Instruments Incorporated
1