Audio Dock: Performance

With the popularity of portable media and the devices that carry them, the ease of drop and sync capability with computers and media centers becomes important. This audio dock design uses TI audio processors for performance designs.

Block Diagram

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Audio Codec / ADC Audio Codec / DAC Digital Audio Processor Input Amplifiers Input Amplifiers Line Amplifier Digital Audio SOC Speaker Amp (Wfr) Speaker Amplifier (R/L) Battery Management Integrated Solution IRDA USB AC Adapter Loise Noise LDOs System Power Low Power Wireless

Design Considerations

The Audio Dock: Performance speaker system, which provides the highest level of audio performance, is powered by AC mains and also has provisions for battery power. Using a highly efficient Class-D amplifier extends battery runtime and requires no costly heat sink. The speaker output includes two stereo amplifiers - one to drive the left and right speakers, and the other that drives a dual-coil subwoofer. The system allows audio input from a docking connector, USB streaming audio, or a line input. Newer generation TI audio codecs, such as the TLV320AIC3254, process sound with better audio quality and longer battery life.

TI recognizes that this class of speaker systems has a tradeoff between output power and sound quality, and in the case of a portable system, battery runtime. The block diagrams for the Basic, Portable and Performance audio docking stations represent a balance of these requirements, each optimized for a different usage model.

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