Automotive emergency call (eCall) audio subsystem reference design

The efficiency and diagnostics necessary for automotive emergency call (eCall) systems generate unique requirements for the audio subsystem, such as speaker diagnostics, and low power consumption.  This TI Design shows how to use TI's automotive two-channel audio codec (TLV320AIC3104-Q1) and a class-D audio amplifier (TAS5411-Q1) for eCall applications.

Features

• The integrated load-dump protection reduces external voltage clamp cost and size 
• Onboard load diagnostics report the status of the speaker through I2C, which reduces external components needed for diagnostic coverage
• TLV320AIC3104-Q1 + TAS5411-Q1 combo allows for reduced power consumption, reduced heat and reduced peak currents in the electrical system
• TAS5411-Q1 provides up to 8W output power for loud, clear audio in an unpredictable emergency environment
• Additional output from the TLV320AIC3104-Q1 can be used for the head unit or other car audio needs and eliminates the need for another device

Parts Include:

TAS5411-Q1  8-W Analog Input Mono Automotive Class-D Audio Amplifier With Load Dump, I2C Diagnostics 
TLV320AIC3104-Q1  Automotive Low-Power Stereo Audio Codec with 6 Audio Input Pins and 6 Audio Output Drivers 
TPD2E007  2-Channel ESD Protection Array for AC Signal Data Interface 
TPS7B6933-Q1  Automotive High-Voltage Ultra-Low IQ Low-Dropout Regulator/Fixed 3.3-V Output Voltage

Learn more by downloading the reference design below