TI TPA3221 100W(立体声)200W(单路)HD音频D类放大器解决方案
TI公司的TPA3221是大功率D类放大器,具有带宽高达100kHz的闭环负反馈,提供音频带的低失真和极好的音频质量,器件工作在AD或低空载电流HEAD(高效AD模式)调制,能对4欧姆负载提供2x105W或对2欧姆负载提供1x208W功率.器件具有单端或差分模拟输入接口,四种可选择增益:18 dB, 24 dB, 30 dB和34 dB,主要用在无线和加电扬声器,条形音箱,超低音音箱,书架立体声系统和专业与公共地址（PA）扬声器.本文介绍了TPA3221主要特性,框图和系统框图,以及TPA3221评估模块主要特性,电路图,材料清单和PCB设计图.
TPA3221 is a high-power Class-D amplifier thatenables efficient operation at full-power, idle andstandby. The device features closed-loop feedbackwith a bandwidth up to 100 kHz, which provides lowdistortion across the audio band and deliversexcellent sound quality. The device operates witheither AD or low idle-current HEAD (High Efficient AD mode) modulation, and can drive up to 2 x 105 W into4-Ω load or 1 x 208 W into 2-Ω load.
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