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Reference design enhances automotive emergency system

03 Apr 2013

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A complete reference design which will provide designers with all the analogue and embedded processing integrated circuits (ICs) required for automotive emergency call (eCall) systems has been recently rolled out by Texas Instruments. In the event of an accident, vehicles equipped with eCall systems will automatically place calls to an emergency service centre in the event of an accident. Customers can accelerate the design of their eCall systems by taking advantage of this reference solution comprised of TI's AEC-Q100 qualified analogue ICs.

Featuring the 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 offers 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 TLV70033-Q1Vage regulator with low quiescent current and the MSP430F2232 16bit ultra-low power microcontroller.

Key features and benefits of TI's automotive eCall reference design:

  • Loud and clear audio quality: The TPA3111D1-Q1 delivers 10-W output power at 8 Ω with greater than 90 per cent 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 to 26 V, the components in this reference design can be powered by 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 of up to 40 V. The Class D amplifier also supports power cycling and speaker open-load detection during initial power-up. These features ensure robust operation in harsh automotive environments and simplify failure analysis.

The TPA3111D1-Q1 is available in a 28-pin HTSSOP package, and is priced at US$0.90 in 1,000-unit quantities. The TPA3111D1-Q1 evaluation module (EVM) is available for immediate orders and priced at US$149.00. Download the simulation model at www.ti.com/tpa3111d1-q1-pr.

The TPS43330-Q1 is available in a 38-pin HTSSOP package and is priced at US$3.00 in 1,000-unit quantities. The TPS43330-Q1 evaluation module (EVM) is available for immediate orders and priced at US$99.00. Download the simulation model at www.ti.com/tps43330-q1-pr.

The TLV70033-Q1 is available in a 5-pin SOT package and is priced at US$.15 in 1,000-unit quantities. Download the simulation model at www.ti.com/tlv70033-q1-pr.

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