Dialog Semiconductor Launches New Combined Power Management and Audio IC
Dialog Semiconductor Plc has launched a new 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 realized. The chip integrates over 50 different main functions on chip, includes a full high quality 24-bit hi-fi stereo subsystem, features a high current rating 1400mA buck converter and includes the first linear regulators to feature Dynamic Voltage Management (DVM).
The DA9034 is a sophisticated system-on-a-chip, significantly reducing the number of ICs required and reducing PCB area by more than half. 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 DA9034 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 converters 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 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.
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 1 mm 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.
