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Power, audio controls merge in one IC

Posted: 05 Jul 2006 ?? ?Print Version ?Bookmark and Share

Keywords:Dialog? DA9034? power management and audio controller?

Power management, audio controls in one IC

Dialog Semiconductor Plc has launched a new combined power management and audio IC designed to support the latest generation of application processors in emerging high-growth devices such as smart phones, portable multimedia devices, PDAs and personal navigators.

According to Dialog, its new DA9034 power management and audio controller IC is a sophisticated SoC that significantly reduces the required number of ICs and PCB area required in a system. It is touted to be the most highly integrated power and audio controller to support applications processors in 90nm technologies and below. The IC connects directly to the battery, providing complete control of all power management, battery charging, audio (stereo audio playback, microphone, loudspeaker and handsfree functions), white and general purpose LED drivers, USB interface and many other functions that need to be controlled in a portable multimedia device, the company explained.

Dialog said the chip was developed in response to the demand for higher functionality and better power efficiency from the latest generation application processors so that performance can be enhanced in handheld devices playing audio and video. The chip supports a range of leading applications processors including the Monahans from Intel.

The device includes 18 high performance programmable LDO voltage regulators that create stable, low-noise supply voltages for all other ICs in the handset, PDA or portable device. Two DC/DC buck converters that provide high current, low voltage supplies to the processor core and memory support digitally controlled Dynamic Voltage Management with programmable voltage and slew rate control. A further boost converter generates a programmable high voltage supply, up to 25V and 1.3A, which may then be used to power three individual LED backlighting channels and high power flash or video light LEDs.

A fully integrated audio sub-system is one of the key features of the new device. This includes a 24bit hi-fi stereo DAC with programmable sample rates up to 48KHz 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 32KHz sampling, two microphone amplifiers, low noise input and output audio multiplexers, capacitorless low distortion 16-ohm headphone drivers, half-watt loudspeaker driver with volume and anti-pop control, and 32-ohm earpiece driver. The flexible output switching matrix enables any signal source to be output via headphones, earpiece or high-power handsfree drivers. The audio subsystem has advanced power management controls to minimize quiescent current and consumes 9mW in 8KHz voice mode and 35mW in 48KHz HiFi mode.

The DA9034 is available in sample quantities in a 196BGA 8-by-8-by-1mm package. The high level of integration allows this device to replace a number of ICs, halving the PCB area required when compared to alternative solutions, Dialog said.

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