Product category:
Power Supply ICs and Controllers
News Release from: Dialog Semiconductor | Subject: DA9034
Edited by the Electronicstalk Editorial
Team on 05 July 2006
Power management and audio come together
in one
A combined power management and audio IC is designed especially to support the latest generation of application processors in emerging high growth applications.
Dialog Semiconductor has launched a combined power management and audio IC designed especially to support the latest generation of application processors in emerging high growth applications such as smartphones, portable multimedia devices (PMP), PDAs and personal navigators The company's new DA9034 power management and audio controller IC addresses the growing need to merge more functions so that battery life can be prolonged and smaller and thinner handheld solutions can be realised
This article was originally published on Electronicstalk on 1 Dec 2006 at 8.00am (UK)
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The chip integrates over 50 different main functions on chip, includes a full high quality 24bit hi-fi stereo subsystem, features unique high current rating 1400mA buck convertor and includes the first linear regulators to feature dynamic voltage management (DVM).
The DA9034 is a very sophisticated system-on-a-chip, significantly reducing the number of ICs required and reducing PCB area by more than half.
It is the most highly integrated power and audio controller to support applications processors in 90nm technologies and below.
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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 chip has been developed by Dialog Semiconductor in response to the demand for higher functionality and better power efficiency from the latest generation application processors so that the performance can be enhanced in handheld devices playing audio and video.
The DA9034 IC supports a range of leading applications processors including the Monahans from Intel.
The DA9034 is a complete analogue baseband solution which exploits Dialog's expertise in integrating multiple mixed signal functions onto a single chip - alternative solutions require separate discrete power management and audio components.
The chip includes 18 high performance programmable LDO voltage regulators which create stable, low noise supply voltages for all other ICs in the handset, PDA or portable device.
Two high-efficiency DC/DC buck convertors which provide high current, low voltage supplies to the processor core and memory support digitally controlled dynamic voltage management (DVM) with programmable voltage and slew rate control.
A further boost convertor 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 full integrated audio subsystem is one of the key features of the DA9034.
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 16ohm headphone drivers, 500mW loudspeaker driver with volume and anti-pop control and 32ohm 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 control to minimise quiescent current and consumes as little as 9mW in 8kHz voice mode and 35mW in 48kHz hi-fi mode.
Other functions included in the DA9034 include programmable backlight and flash LED drivers.
The backlight drivers feature an advanced dimming function which ramps the LED current giving a smooth change in light output.
A 10bit ADC is integrated for user measurements and features three channels with programmable upper and lower threshold limits and an automatic measurement and averaging mode to simplify software.
The ADC also supports a four-wire touchscreen interface.
Also included is sophisticated battery management with a programmable battery charger supporting constant voltage, constant current (up to 1.4A), pulse and trickle charging from either USB or external adapters.
The battery management subsystem includes a UART supporting intelligent battery communication, full time supervision with over and undervoltage protection, a battery temperature measurement and a reverse mode to allow powering of accessories from the phone system connector.
The LDOs in the DA9034 feature high power supply rejection ratio (PSRR) of typically 80dB at 217Hz, and very low quiescent current, enabled by Dialog Semiconductor's patented Smart Mirror technology.
Smart Mirror regulators mirror the output current demand back to the bias generator, which allows the bias to be reduced automatically as demand falls, to enable dynamic quiescent current control - thus providing high PSRR and dynamic performance over a wide range of operating currents, without being constrained by the usual design compromise of being over- biased under all conditions except when under maximum load.
This autonomous adaptive bias control also removes the need for a low power operating mode and hence user intervention to switch to a lower power mode at low current demands.
Using this technique at 10mA, Dialog's LDOs offer typically 99% current efficiency, consuming less than 15 microamps.
The DA9034 is available now in sample quantities in a 196BGA 8 x 8 x 1mm package.
The high level of integration allows this device to replace a number of ICs halving the PCB area required when compared with alternative solutions.
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