Wolfson Smart Power gets smarter
Wolfson Microelectronics has announced two additional products utilising its Smart Power technology. 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.
WM8351 and WM8352 integrated power management and audio ICs bring increased options to 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% off the bill of materials (BOM) cost and 50% on the board footprint.
Designers of portable consumer electronics, including portable audio and navigation devices, can now choose from a range of products to suit their needs. 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 9 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 an excellent 98dB SNR performance. It supports six analogue inputs, two stereo analogue outputs and two mono line outputs, and can drive headphones directly.
| Feature | Benefit |
|---|---|
| High-performance audio CODEC | Enhanced user experience in portable multimedia devices |
| Pop and click suppression | Improved audio quality and reduced external component count |
| Low DAC playback power consumption | Longer battery life in portable audio applications |
| >90% power efficiency on DC-DC converters extends battery life | Longer battery life in portable devices |
| 2MHz switching frequency on DC-DC converters | Reduced external component size. Supports smaller form factor builds in portable devices |
| Integration of Power Management features including 6xDCDC, 4xLDOs and battery charger | Reduced external component count saves up to 25% on bill of materials (BOM) cost |
| Compact 7x7mm BGA package | Saves up to 50% on physical board area. Supports smaller form factor builds in portable devices |
Wolfson is working with the key application processor vendors to develop reference designs using the WM8351 and WM8352 – delivering proven power management solutions to the end customer.
Pricing and Availability:
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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