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Automotive-grade audio amp aimed at eCall, telematics apps

Posted: 03 Sep 2014 ?? ?Print Version ?Bookmark and Share

Keywords:Texas Instruments? eCall? telematics? audio amplifier?

Texas Instruments (TI) has announced what it says is the industry's first automotive Class-D audio amplifier to integrate load-dump protection and diagnostics in a single device for emergency call (eCall) and instrument cluster systems. By using the TAS5421-Q1, designers can remove multiple discrete components, shorten automotive-grade diagnostic design and extend battery back-up power, stated the company.

Demand for eCall systems in cars is increasing. In case of a crash, the eCall system automatically communicates and broadcasts its location to the nearest emergency centre, which can cut response time to save lives. eCall systems need to run reliably and autonomously for long periods of time using only backup battery power. System designers can take advantage of the TAS5421-Q1's 90 per cent efficiency and low quiescent current to make this possible.

The mono-channel, analogue differential input amplifier integrates 40V load dump and over-temperature to protect against harsh automotive conditions, such as load dump, which can damage the Class-D amplifier. It also eliminates the need to use additional battery cells, cutting overall system cost, space and weight compared to discrete solutions. Additionally, the device replaces discrete solutions with full automotive-grade diagnostics to reduce cost and development time, ensure reliability and decrease system complexity, detailed the company.

Customers can accelerate the design of their eCall systems by taking advantage of a complete automotive eCall reference design composed of analogue AEC-Q100-qualified ICs from TI. This design in the TI Designs reference design library includes the full BOM, schematics, test data and design files for quick design of an eCall system.

The TAS5421-Q1 is available in a 16-pin HTSSOP package with PowerPAD package. Suggested retail pricing in 1,000-unit quantities starts at $1.74.

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