High quality and small footprint make it ideal for the latest mobile applications

Edinburgh, UK, 11th February 2008 - Wolfson Microelectronics plc (LSE: WFL.L) today announces the WM9001 mono 1W switchable Class AB/D speaker driver. WM9001 is designed to deliver exceptional audio performance and enhanced flexibility to portable applications system designers.
User selectable features such as class D or AB output modes, single ended or differential input modes, device clocking and speaker boost gain can all be configured by the system designer for application optimization.

Moreover, small device footprint allows placement close to the speaker housing, enabling simplified PCB layout and maintaining signal integrity by minimizing high frequency signal track lengths. Audio performance is enhanced through differential input and output modes to remove undesired noise. Additionally, RF noise suppression is improved and external component count reduced by an integrated oscillator for clocking the class D outputs. Low leakage, high PSRR and pop/click suppression enable the speaker supply to be connected directly to the battery without compromising battery life or audio quality.

“The WM9001 is a flexible class AB/D speaker driver solution with integrated pop and click suppression circuitry. This provides system designers with maximum flexibility in diverse portable media devices to enhance the multimedia experience with high performance audio and voice quality while reducing system cost and PCB area,” commented Richard Potter, Product Line Manager for Mobile Handset products.

WM9001 also connects seamlessly with both the WM8990 audio hub codec and the new WM8400 audio and power management IC, enabling a full stereo 1W class AB/D speaker drive solution for multimedia rich mobile handsets. The WM9001 can easily connect to Wolfson’s portfolio of high performance, low power audio CODECs and DACs, bringing quality speaker drive performance to portable applications.

WM9001 comes in small, low profile 3x3mm QFN-16 and 1.64x1.64mm CSP package options, making it ideal for space constrained applications such as mobile phones, navigation devices, media players, laptops and electronic dictionaries.

Availability
The WM9001 is available to sample now.

About Wolfson Microelectronics
Wolfson Microelectronics plc is a leading global provider of high performance, mixed-signal semiconductors to the consumer electronics market.

Wolfson is known for its high performance audio and ultra low power consumption, its devices are at the heart of many high profile consumer electronics products, including mobile phones, mp3 players, flat panel TVs and in-car infotainment systems. Wolfson technology enables exciting new end-user experiences by connecting the digital world to the human senses.

Headquartered in Edinburgh, UK, Wolfson has sales and engineering offices in the USA, Japan, China, Taiwan, Korea, Singapore and India.

Wolfson Microelectronics plc is listed on the London stock exchange (LSE: WLF.L).

For more information about Wolfson Microelectronics, please visit:
www.wolfsonmicro.com or sign up for Wolfson eNews at:
www.wolfsonmicro.com/enews

Contacts 
Chris King/Rob Ashwell
EML
Tel: +44 (0) 208 408 8000
Email: wolfson@eml.com

Anne Connolly
Wolfson Microelectronics plc
Tel: +44 (0) 131 272 7000
Email: anne.connolly@wolfsonmicro.com

RELATED PRODUCTS
WM9001
PRESS
WM9001 IMAGE