IC integrates power management with stereo audio - Embedded.com

IC integrates power management with stereo audio


Dialog Semiconductor has launched a combined power-management and audio IC aimed at the latest generation of application processors in such as smartphones, portable multimedia devices, PDAs, and personal navigators. The DA9034 integrates over 50 functions on-chip, includes a full 24-bit hi-fi stereo subsystem, and features a 1400-mA buck converter. It also includes linear regulators designed with the company's dynamic voltage management (DVM). The part connects directly to the battery, providing complete control of all power management, battery charging, audio (stereo audio playback, microphone, loudspeaker, and hands-free functions), white and general purpose LED drivers, and the USB interface.

The DA9034 is a complete analog baseband solution that includes 18 high-performance programmable LDO voltage regulators which create stable, low-noise supply voltages for all other ICs in the handset.

Two high-efficiency dc-dc buck converters provide high-current, low-voltage supplies to the processor core and memory support digitally controlled DVM with programmable voltage and slew rate control. A further boost converter generates a programmable high voltage supply, up to 25 V and 1.3 A, which can then be used to power three individual LED backlighting channels and high-power flash or video light LEDs.

The audio sub-system's DAC has programmable sample rates up to 48 kHz and automatic sample rate conversion, which make it suitable for playback of multimedia sources such as MP3 and WMA files. Other integrated features include voice codec with programmable filtering and 8-, 16-, and 32-kHz sampling, two microphone amplifiers, low noise input and output audio multiplexers, capacitorless low distortion 16-ω headphone drivers, 0.5-W loudspeaker driver with volume and anti-pop control, and a 32-ω earpiece driver.

The DA9034 is available now in sample quantities in a 196-lead BGA package that measures 8 by 8 by1 mm. More information is available at www.diasemi.com.

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