Edinburgh, UK (October 16, 2007)–Wolfson Microelectronics has launched the first product in its AudioPlus Power Management product line. Wolfson’s WM8350 features an integrated high-fidelity audio codec and power management subsystem which, according to the manufacturer, delivers high-performance audio, extended battery life and reduced system cost for portable audio and navigation applications.
WM8350 functions include a high-performance, low-power audio codec; on-chip clock generator; six DC-DC converters, four low drop out (LDO) regulators; battery charger; two white LED drivers; and an auxiliary analog-to-digital converter (ADC), inside a 7×7 mm BGA package.
Dave Shrigley, CEO of Wolfson Microelectronics, states, “The Wolfson brand is known for high-fidelity audio performance. Building upon this foundation, Wolfson is pursuing its AudioPlus growth strategy. Wolfson’s strategy of integrating mixed-signal technology and key elements of the audio signal chain enables improved or new end-user experiences and more highly optimized, lower-cost solutions. The AudioPlus Power Management product line is the first phase of the Wolfson AudioPlus growth strategy.”
Paul Wilson, Wolfson’s Power Management Product Line Manager, adds, “The pressure is on for system designers to deliver high-performance multimedia experiences and extended battery life in ever smaller devices, and get them to market fast. It’s a highly competitive market and the WM8350 provides an integrated approach that enables system architects and designers to meet these often conflicting demands.”
The WM8350 provides six analog inputs, two stereo analog outputs and two mono line outputs, and drives headphones directly. A built-in power management controller is responsible for the output voltage settings, start-up sequence, and low-power modes for all on-chip DC-DC converters and LDO regulators.
Four 2 MHz DC-DC step-down (buck) converters generate the supplies for CPU core, I/O, memory devices and other system peripherals. Each of these converters provides a programmable output voltage between 0.85 V and 3.4 V in 25 mV steps with peak efficiencies of more than 90 percent using a small external inductor and capacitor. Two 1 MHz DC-DC step-up (boost) converters with greater than 90 percent peak efficiency can be used for backlight displays and generation of a +5 V supply for USB OTG.
Four 150 mA low-noise LDO voltage regulators can be used to generate the supplies for the audio CODEC, external PLL and other system functions. Each of these regulators provides a programmable output voltage that can range between 0.9 V and 3.3 V in 50 mV or 100 mV steps.
The WM8350 incorporates thirteen GPIO pins which can be programmed for alternate system functions including system “wake ups” and enabling low-power operation.