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Class-D amp slashes up to 50% cost in car audio systems

Posted: 24 Oct 2008 ?? ?Print Version ?Bookmark and Share

Keywords:audio amplifier? car audio system?


Texas Instruments Inc. has extended its TAS54xx family of Class-D audio amplifiers with two new devices that offer greater integration and channel flexibility, saving OEMs up to 50 percent system cost when designing automotive head unit and external amplifier applications. The latest devices offer customers the same great EMC and audio performance of the TAS54xx family while providing more system-level flexibility.

The TAS5412 with single-ended inputs and TAS5422 with differential inputs provide OEMs with improved system design flexibility when combined with TI's existing four-channel amplifier devices, the TAS5414A and TAS5424A. Now car audio system architects can optimize designs that require two or six channels by more efficiently matching the number of speakers while maintaining high levels of integration. In addition, the new TAS5412 and TAS5422 are designed to operate in car audio systems without a MCU, offering system-level cost savings.

The TAS5412 and TAS5422 provide superior EMC performance, a key requirement that determines whether electrical components will negatively interfere with other electronic systems within the vehicle. Both amplifiers use the same patent-pending technology from the TAS54x4A, which surpasses CISPR-25 Level 5 and many OEM-specific requirements, to ensure that high-power audio systems do not compromise vehicle operation.

In addition, the TAS5412 and TAS5422 support higher voltage and current capabilities, enabling a higher maximum output power for applications where feature densities and system configurations require reduction in heat from the audio power amplifier. The amplifiers also incorporate patented pulse-width modulation designs that provide excellent power supply rejection in the harsh electrical environment common in automotive applications.

The TAS5412 and TAS5422 are sampling with volume production scheduled for Q1 09. The TAS5412 is $5.30 and the TAS5422 is $5.80 in 1,000-piece quantities. Additional members of the TAS54xx family and pricing in 1,000-piece quantities are summarized below.

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