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Send til en ven   Udskriv23/3 2010 kl. 10:34
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Kombinerede powermanagement og audio IC'er

Dialog Semiconductor lancerer ny generation af ultra-effektive, konfigurerbar system power management og audio IC'er (in english). 

Dialog Semiconductor plc  has announced its second generation of system level power management ICs, which now include an integrated class G codec. Called the DA9057, the device's five on-board dc/dc converters optimally support 24-bit stereo audio headphone playback on a 5mW power budget. This further extends battery life for music-enabled devices.

The DA9057 combines the industry's most flexible power sequencer with a fully programmable filter/mixer engine to support a wide variety of ARM-based multimedia processors.

Its power handling capability is maximised by the integration of a dual-input switching USB power manager/Li-ion battery charger plus five programmable dc/dc converters. This architecture increases the current available to a system, enables 'instant on' operation and allows handsets to run cooler with less time spent charging.

A dedicated programming graphical user interface empowers OEMs to easily optimise a system's power sequencing requirements, even when additional functionality is added late in the design cycle.

The DA9057's integrated true-ground Class G headphone driver is up to 70 per cent more efficient than a standard Class AB amplifier.

In addition, a standalone filterless Class D speaker driver has also been introduced. The DA7201 is a 3W mono audio power amplifier capable of driving 4 ohm speaker loads. The component is typically twice as efficient and has a smaller footprint than its Class AB equivalent.

Designed to interface directly to the DA9057's differential line outputs, its tiny 1.5mm2 footprint allows placement close to the speaker, delivering a peak efficiency greater than 90 per cent, and reduces heat build-up in portable applications with embedded mono or stereo speakers. Both the DA9057 and DA7201 allow direct battery connection.

- Handheld mobile internet devices, such as smartphones, are becoming ever more powerful and the pressure to free board space, manage power budgets and heat build-up within the product casing have become our customers' biggest concern,  explaines Mark Jacob, Dialog's director of marketing for audio & power management.
- We've responded by carefully combining the most power-efficient technologies at higher levels of integration and delivered a highly compact yet flexible mixed signal solution for this burgeoning market. 

Other functions integrated on DA9057 include a programmable LED backlight driver, backup coin-cell charger, touchscreen interface, voiceband codec with sidetone, ALC (automatic level control), general purpose filter engine and 5-band equaliser.

Engineering samples of the DA9057 are available now in a 7x7mm BGA 169 package. Engineering samples of the DA7201 will be available from April in a wafer level CSP 9 package. Volume production delivery for both devices will begin in Q4 of 2010.

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