Automotive eCall Reference Design


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Stay tuned for edition 2.0 of TI’s Automotive eCall Reference Design featuring integrated load dump protection, advanced diagnostic interface and optimized EMI (Electromagnetic interference) performance.


Vehicles equipped with eCall systems will enable phone calls to an emergency service center in the event of an accident. Customers can accelerate the design of their eCall systems by taking advantage of a complete reference solution comprised of AEC-Q100 qualified integrated circuits (ICs) from TI.

This reference design combines the TPA3111D1-Q1, TI’s highly efficient mono Class D audio amplifier and the TPS43330-Q1, low Iq, single boost, dual synchronous buck controller with other analog and embedded processing components to create a robust, low cost solution that is scalable for other automotive applications such as telematics, stolen vehicle tracking and HEV/EV sound generation. It also incorporates the TPS7A1601-Q1 voltage regulator with low quiescent current and the MSP430F2232 16-bit ultra-low power microcontroller.

Learn more about TI’s automotive eCall and telematics solution by watching the demonstration video below

Watch a short intro video: Automotive eCall & Telematics Demo

Extended Demo Video:

  • Loud and clear audio quality:
      The TPA3111D1-Q1 delivers 10W output power at 8Ω at greater than 90 percent efficiency and has enhanced EMI suppression technology to improve noise immunity. This ensures loud and clear audio quality; which is imperative in an eCall system where outside noise can sometimes overwhelm the emergency call.
  • Emergency operation:
      The TPS43330-Q1 pre-boost circuit supports automotive start/stop and boosts backup battery supply voltage, allowing operation down to 2V at the input. Combined with the wide supply voltage (8V-26V) range of TPA3111D1-Q1, the components in this reference design can be powered off a single cell LiFePO4 battery in case the car battery connection is severed in an accident.
  • System protection:
      The components offered in this system provide over-voltage and load dump protection against input transients up to 40V. The Class D amplifier also offers power cycling capability and speaker open-load detection during initial power-up.


TI Devices (7)

Order samples, get tools and find more information on the TI products in this reference design.

Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
MSP430F2232  16-bit Ultra-Low-Power Microcontroller, 8KB Flash, 512B RAM  Ultra-low Power  Sample & Buy View Design Kits & Evaluation Modules
TAS5421-Q1  22-W Mono Automotive Digital Audio Amplifier With Load Dump and I2C Diagnostics  Speaker Amplifier and Modulator  Sample & Buy View Design Kits & Evaluation Modules
TLV70033-Q1  Automotive Catalog 200mA, Low IQ, Low Dropout Regulator for Portables  Linear Regulator (LDO)  Sample & Buy Not Available
TLVH431A-Q1  Automotive Catalog Low-Voltage Adjustable Precision Shunt Regulator  Voltage Reference  Sample & Buy Not Available
TPA3111D1-Q1  Automotive 10W Analog input Mono Class D Amplifier with SpeakerGuard(TM)  Speaker Amplifier and Modulator  Sample & Buy View Design Kits & Evaluation Modules
TPS43330-Q1  Automotive Catalog Low Iq, single Boost , dual synchronous Buck controller  Power Management  Sample & Buy View Design Kits & Evaluation Modules
TRS3223-Q1  Automotive Catalog 3-V To 5.5-V Multichannel RS-232 Line Driver/Receiver With +/- 15-kV ESD  Interface  Sample & Buy Not Available

Technical Documents
User guides (1)
*This is not an TI official document.
Title Date Type
eCall Reference Design Wiki 17 Mar 2013 Wiki*
User Guides (1)
Title Abstract Type Size (KB) Date Views
PDF 200 09 Sep 2013 892
Design Files (3)
Title Abstract Type Size (KB) Date Views
PDF 114 19 Oct 2013 714
PDF 380 19 Oct 2013 1,187
ZIP 907 09 Sep 2013 694

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