Bluetooth audio module cuts wireless speaker dev't time29 May 2012
Combining HiWave's HiAS2002 Audium amplifier chip with CSR's BC-05 Bluetooth technology, the DyadBA3 supports AVRCP and A2DP Bluetooth audio profiles. It also delivers two channels of 13W burst power output into 8Ω speaker drive units. Already in development is profile support for aptX and HSP (headset).
The HiAS2002 extends battery life by up to 20 times at normal listening levels, compared with Class-D amplifiers. The amplifier's envelope-tracking technology eliminates clipping at high audio levels, ensuring clear sound at all volumes.
The DyadBA3 module may be entirely powered from a single lithium-ion or lithium polymer battery. And it incorporates circuitry for charging from a USB host or AC power adapter.
HiWave's Audium audio processing includes multistep volume control at 1.5dB per step, a mute function with adjustable ramping, and 16 user-definable bi-quad filters for implementing equalization, voicing, tunable bass extension and stereo-wide effects. The DyadBA3 module self-configures on power-up and invokes power-saving modes when no audio signal is present. It also incorporates a stereo microphone input, making it also suitable for desktop or portable VoIP-phone audio portal applications.
Sized 110 x 46 x 25mm, the DyadBA3 module makes an ideal front-end to HiWave's patented BMR (Balanced Mode Radiator) speaker drive units. Pairing the module with two HIBM36S12 BMRs creates a compact, fully portable Bluetooth stereo speaker capable of delivering room-filling sound. For greater volume and frequency range, explains HiWave, a pair of the company's new HIBM36S05 BMRs will deliver an even higher level of full-range, widely dispersed sound.
James Lewis, HiWave's CEO, commented: "We continue to extend the capability of our Audium amplifier chip platform, and will shortly be demonstrating Volume Overdrive which boosts audio power output by a further 9.5dB."
HiWave is currently sampling the DyadBA3 module to its key customers; it will be available in mass production quantities in August.
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