DESCRIPTION
Simply by adding appropriate power output stages a 2.1 channel power amplifier may be built. Two identical full audio bandwidth channels, plus a reduced bandwidth sub channel are provided as PWM outputs. A Graphic Equaliser function is provided, plus selectable high frequency equalisation to suit different speaker types. Independent volume control for each channel is provided. The WM8602 PWM controller is compatible with integrated switching output stages available from a number of vendors or alternatively may be used with a discrete output stage configuration and achieve similar levels of performance. A Dynamic Peak Compressor with programmable attack and decay times is included, which allows headroom for tone control, bass management and extra digital gain to be provided, without clipping occurring. A Synchroniser allows slaving to LRCLK, thus making the WM8602 independent of source MCLK frequency and jitter. The device is controlled via a 2/3 wire serial interface. The interface provides access to all features including channel selection, volume controls, mutes, de-emphasis and power management facilities.
Wolfson Microelectronics plc
