Bluetooth Wireless-Speaker Module Prolongs Battery Life

Cambridge, UK: HiWave’s DyadBA3 module combines the company’s HiAS2002 Audium amplifier chip with CSR’s BC-05 Bluetooth technology to extend battery life in portable wireless speakers. Combining the devices into a module is intended to provide a quick-to-implement solution for designers of consumer audio products.

The DyadBA3 module can be entirely powered from a single lithium-ion or lithium polymer battery, but it incorporates circuitry for charging from a USB host or ac power adapter. According to the company, the device boosts battery life for wireless speakers by up to 20 times at normal listening levels, compared to Class-D amplifiers. The amplifier’s envelope-tracking technology eliminates clipping at high audio levels, ensuring clear sound at all volumes.

Audium audio processing includes multi-step volume control at 1.5dB per step, a mute function with adjustable ramping, and 16 user-definable bi-quad filters for implementing equalisation, 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 incorporates a stereo microphone input, which also suits it for desktop or portable VoIP-phone audio portal applications.

DyadBA3 supports AVRCP and A2DP Bluetooth audio profiles, and delivers two channels of 13W burst power output into 8Ω speaker drive units.

http://www.hiwave.com