Wolfson extends Smart Power solutions for designers of portable devices

Wolfson Microelectronics has launched two additional integrated power management and audio ICs utilizing its Smart Power technology to offer more options for designers of portable devices.

The WM8351 and WM8352 integrated high fidelity audio CODEC and power management ICs have been introduced to complement Wolfson's proven WM8350 integrated power management device launched in October 2007. Between the three products Wolfson is offering system designers support for a wider range of multimedia processors and usage scenarios.

Both the WM8351 and WM8352 are highly integrated solutions that deliver power management and audio without compromise. Compared to using separate CODEC and power management chips, which typically require two or more additional components, the WM8351 and WM8352 offer savings of up to 25 percent off the bill of materials (BOM) cost and 50 percent on the board footprint.

The simplified WM8351 is targeted at lower cost platforms that do not require all of the WM8350's functionality. The WM8532 has the same capabilities as the WM8350 but offers extra configuration settings to support high-end designs.

The WM8350, WM8351 and WM8352 are able to support the majority of application processors. The three devices have a mode where complete control is available which is in addition to the combined nine pre-set start up and configuration settings.

The WM8351 is aimed at lower cost solutions that do not require all of the functionality on the WM8350 or WM8352. The reduced functionality results in 3 step down DC-DC buck converters and 1 step up DC-DC boost converter. In comparison the WM8352 has the same functionality as the WM8350 and includes 4 step down DC-DC buck converters and 2 step up DC-DC boost converters.

Both the WM8351 and WM8352 feature an integrated audio CODEC that provides all the necessary functions for high-quality stereo recording and playback. Programmable on-chip amplifiers allow direct connection of headphones and microphones with a minimum of external components. An on-chip battery charger in the WM8351 and WM8352 supports both trickle charging and fast (constant current, constant voltage) charging of single-cell lithium batteries. The charge current, termination voltage, and charger time out are programmable to suit different types of batteries.

The WM8350 features a high performance, high fidelity stereo CODEC with advanced mixing capability, delivering 98dB SNR performance. The device supports six analogue inputs, two stereo analogue outputs and two mono line outputs, and can drive headphones directly.

Availability and Pricing

The WM8351 and WM8352 are available for sampling now and available in volume in Q1 2009. The WM8351 is priced at $4.63 per unit in volumes of 1,000 and the WM8352 is priced as $5.41 per unit in volumes of 1,000.

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