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WM8608

更新时间: 2024-09-14 22:30:31
品牌 Logo 应用领域
欧胜 - WOLFSON 控制器
页数 文件大小 规格书
54页 523K
描述
5 TO 7.1 CHANNEL PWM CONTROLLER

WM8608 数据手册

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WM8608  
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5 to 7.1 Channel PWM Controller  
DESCRIPTION  
FEATURES  
Multi-channel PWM audio amplifier controller  
Supports Stereo, 5.1, 6.1 or 7.1 inputs  
The WM8608 comprises a high performance multi-channel  
PWM digital power amplifier controller. Simply by adding  
appropriate power output stages a multi-channel power  
amplifier may be built. Six identical full audio bandwidth  
Supports 2.1, 5.1 or 6.1 outputs with optional rear centre  
channel generation  
channels, plus  
a reduced bandwidth sub channel are  
PWM Audio Performance with typical output stage  
provided as PWM outputs, to drive 6 speakers plus Sub.  
100dB SNR (‘A’ weighted @ 48kHz)  
0.01% THD @ 1Watt  
The PCM to PWM converter supports up to 7.1 channels of  
audio, in PCM input formats. These may be mixed down to  
6.1 or 5.1 outputs, by mixing rear channel data into centre  
rear or surround speakers if required. If 5.1 channel data is  
input, the surround data may be processed internally to  
create a pseudo 6.1 signal with rear channel output.  
0.1% THD @ 30Watt  
Integrated Bass Management support with adjustable filter  
Integrated 4-band Graphic Equaliser for 3 front channels  
Adjustable output stage filter compensation for different  
speakers  
A Graphic Equaliser function is provided, plus selectable  
high frequency equalisation to suit different speaker types.  
Independent volume control for each channel is provided.  
Volume control on each 6.1 channel +24dB to -103.5dB in  
0.5dB steps, with volume ramping and auto-mute  
functions  
The WM8608 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.  
Programmable Dynamic Peak Compressor avoids clipping  
even at high volume settings  
Internal PLL and optional crystal oscillator, supporting  
Audio and MPEG standards  
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.  
2/3-Wire MPU Serial Control Interface  
Master or Slave Clocking Mode  
Programmable Audio Data Interface Modes  
I2S, Left, Right Justified or DSP  
16/20/24/32 bit Word Lengths  
A Synchroniser allows slaving to LRCLK, thus making the  
WM8608 independent of source MCLK frequency and jitter.  
De-emphasis support for stereo  
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 48-pin  
TQFP package.  
Selectable CMOS or LVDS digital outputs  
APPLICATIONS  
Surround Sound AV Processors and Hi-Fi systems  
Automotive Audio  
DVD receivers  
Product Preview, March 2004, Rev 1.5  
Copyright 2004 Wolfson Microelectronics plc  
WOLFSON MICROELECTRONICS plc  
www.wolfsonmicro.com  

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