Reference design for emergency call systems in cars

Texas Instruments has introduced a reference design for fast-designing automotive emergency call (eCall) systems. This reference solution comprised of AEC-Q100 qualified analog ICs from TI, which includes TPA3111D1-Q1 high efficiency mono Class D audio amplifier and the TPS43330-Q1, single-boost, dual synchronous buck controller with ultra low quiescent current, TI's automotive eCall reference design is claimed by TI as a robust and yet low-cost design that is scalable for other automotive applications, such as telematics, stolen vehicle tracking and HEV/EV sound generation. It also incorporates the TLV70033-Q1 voltage regulator with low quiescent current and the MSP430F2232 16-bit ultra-low power microcontroller. Key features and benefits of this automotive eCall reference design as per TI: Loud and clear audio quality: The TPA3111D1-Q1 delivers 10-W output power at 8 Ohm with greater than 90 percent efficiency, and offers enhanced EMI suppression to improve sound immunity. This ensures loud and clear audio quality; which is imperative in an eCall system where external conditions can sometimes overwhelm the emergency call. Emergency operation: The TPS43330-Q1 pre-boost circuit supports automotive start/stop and boosts back-up battery supply voltage, allowing operation down to 2 V at the input. Combined with the Class D amplifier's wide supply voltage range of 8 V t...