NXP TFA9879高效无滤波器D类音频放大方案
NXP 公司的TFA9879是高效无滤波器单声道D类音频放大器,具有两个独立使用的数字输入,它包括了两个支持各种声音处理特性的处理器,如5波段参量均衡器,单独的低音和高音控制(−18 dB到+18 dB),动态范围压缩器,软件剪辑控制和音量控制(−70 dB 到+24 dB), 工作电压2.5 V 到5.5 V,主要用在手机,PND,笔记本电脑,手提游戏机和MP3/MP4播放器.本文介绍了TFA9879主要特性, 方框图, 可供选择的输出低通LC滤波器以及典型应用电路图.
The TFA9879 is a high-efficiency filter-free mono class-D audio amplifier with two separate digital inputs for mobile applications.
The TFA9879 contains a processor that supports a range of sound processing features including a 5-band parametric equalizer, separate bass and treble control, a dynamic range compressor, soft clip control and volume control. Excellent audio performance combined with high Power Supply Rejection Ratio (PSRR) is achieved through the use of a closed loop configuration.
Two independent digital audio inputs (I2S-bus / PCM / IOM2) are available for connecting both a baseband and a multimedia processor.
The TFA9879 is available in a HVQFN24 package.
TFA9879主要特性:
通用特性:
Closed loop amplifier for:
High power supply rejection ratio
Excellent audio performance
Digital input for high RF immunity
High efficiency for maximizing battery life..
