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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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WM8602SEDV 데이터시트(PDF) 1 Page - Wolfson Microelectronics plc |
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WM8602SEDV 데이터시트(HTML) 1 Page - Wolfson Microelectronics plc |
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1 / 46 page  w WM8602 2.1 Channel PWM Controller WOLFSON MICROELECTRONICS plc www.wolfsonmicro.com Product Preview, May 2004, Rev 1.5 Copyright 2004 Wolfson Microelectronics plc DESCRIPTION The WM8602 comprises a high performance stereo + sub PWM digital power amplifier controller. 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. The PCM to PWM converter supports up to 2 channels of audio, in PCM input formats. The on board bass management enables the generation of a sub channel from the stereo PCM data. 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. The device is supplied in a 28-pin SSOP package. FEATURES • Multi-channel PWM audio amplifier controller • Supports Stereo input • Supports stereo or 2.1 with sub channel generation • PWM Audio Performance with typical output stage − 100dB SNR (‘A’ weighted @ 48kHz) − 0.01% THD @ 1Watt − 0.1% THD @ 30Watt • Integrated Bass Management support with adjustable filter • Integrated 4-band Graphic Equaliser • Adjustable output stage filter compensation for different speakers • Volume control on each channel +24dB to -103.5dB in 0.5dB steps, with volume ramping and auto-mute functions • Programmable Dynamic Peak Compressor avoids clipping even at high volume settings • Internal PLL and optional crystal oscillator, supporting Audio and MPEG standards • 2/3-Wire MPU Serial Control Interface • Master or Slave Clocking Mode • Programmable Audio Data Interface Modes − I 2S, Left, Right Justified or DSP − 16/20/24/32 bit Word Lengths • De-emphasis support for stereo • CMOS digital outputs APPLICATIONS • Hi-Fi systems • Automotive Audio • Boombox • Active Speakers |
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