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TAS5709 参数 Datasheet PDF下载

TAS5709图片预览
型号: TAS5709
PDF下载: 下载PDF文件 查看货源
内容描述: 具有EQ和DRC的20W立体声数字音频功率放大器 [20-W STEREO DIGITAL AUDIO POWER AMPLIFIER WITH EQ AND DRC]
分类和应用: 放大器功率放大器
文件页数/大小: 59 页 / 1266 K
品牌: TI [ TEXAS INSTRUMENTS ]
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TAS5709  
SLOS599NOVEMBER 2008........................................................................................................................................................................................... www.ti.com  
Dynamic Range Control (DRC)  
The DRC scheme has a single threshold, offset, and slope (all programmable). There is one ganged DRC for the  
high-band left/right channels and one DRC for the low-band left/right channels.  
The DRC input/output diagram is shown in Figure 31.  
Refer to GDE software tool for more description on T, K, and O parameters.  
K
1:1 Transfer Function  
O
Implemented Transfer Function  
T
Input Level (dB)  
M0091-02  
Professional-quality dynamic range compression automatically adjusts volume to flatten volume level.  
• Each DRC has adjustable threshold, offset, and compression levels  
• Programmable energy, attack, and decay time constants  
Transparent compression: compressors can attack fast enough to avoid apparent clipping before engaging,  
and decay times can be set slow enough to avoid pumping.  
Figure 31. Dynamic Range Control  
Attack  
and  
Decay  
Filters  
Energy  
Filter  
Compression  
Control  
Audio Input  
DRC Coefficient  
a, w  
T, K, O  
aa, wa / ad, wd  
0x3B / 0x3C  
0x3E / 0x3F  
DRC1  
DRC2  
0x3A  
0x3D  
0x40, 0x41, 0x42  
0x43, 0x44, 0x45  
Alpha Filter Structure  
S
a
Z–1  
w
NOTE:  
w = 1 – α  
B0265-01  
T = 9.23 format, all other DRC coefficients are 3.23 format  
Figure 32. DRC Structure  
28  
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Copyright © 2008, Texas Instruments Incorporated  
Product Folder Link(s): TAS5709  
 
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