[原创] Maxim MAX98357A PCM输入D类音频放大器解决方案

Maxim公司的MAX98357A/MAX98357B是数字脉码调制(PCM)输入D类放大器,提供AB类音频性能和D类效率,有五个可选择的增益设定(3dB, 6dB, 9dB, 12dB和15dB),单电源2.5V-5.5V工作,5V 4Ω时的输出功率为3.2W,效率92% (RL = 8Ω, POUT = 1W),输出噪音25μVRMS (AV = 15dB),1kHz时的THD+N为0.015%,主要用在笔记本电脑和上网本(Netbook),手机和平板电脑.本文介绍了MAX98357A/MAX98357B主要特性,功能框图和几种应用电路,以及MAX98357开发板DEV(WLP)主要特性,框图,电路图,材料清单和PCB设计图.

The MAX98357A/MAX98357B are digital pulse-code mod­ulation (PCM) input Class D power amplifiers that provide Class AB audio performance with Class D efficiency. These ICs offer five selectable gain settings (3dB, 6dB, 9dB, 12dB, and 15dB) in I2S/left-justified mode set by a single gain select input and a fixed 12dB gain in TDM mode.
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