Maxim MAX9830 2W单声道D类放大方案
Maxim公司的MAX9830是2W单声道D类放大器,提供AB类放大器的音频性能和D类放大器的效率. 5V时的静态电流1.6mA, 3.6V时的静态电流1.2mA,关断模式电流为0.5uA,专利的无滤波器的广谱调制方案不需要通常D类放大器的输出滤波器,从而降低了外接元件.主要用在笔记本和上网本电脑,手机,MP3播放器,手提音频播放器和VoIP电话.本文介绍了MAX9830主要特性,方框图以及MAX9830A评估板主要特性,电路图和元件列表.
The MAX9830 mono 2W Class D amplifier provides Class AB audio performance with Class D efficiency. Active emissions limiting edge rate and overshoot control circuitry greatly reduces EMI. A patented filterless spread-spectrum modulation scheme eliminates the need for output filtering found in traditional Class D devices. These features reduce application component count.
The MAX9830’s industry-leading 1.6mA at 5V, 1.2mA at 3.6V, quiescent current extends battery life in portable applications.
The MAX9830 is available in an 8-pin TDFN (2mm x 2mm x 0.8mm) and is specified over the extended -40℃ to +85℃ temperature range.
MAX9830主要特性:
_ Industry-Leading Quiescent Current: 1.6mA at 5V, 1.2mA at 3.6V
_ Spread Spectrum and Active Emissions Limiting
_ Passes EMI Limit Unfiltered with Up to 24in (61cm) of Speaker Cable
_ Click-and-Pop Suppression
_ Thermal and Overcurrent Protection
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