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RT9121 是采用 I<sup>2</sup>S 接口的高效立体声音频功率放大器，推动 BTL 连接的 8Ω 扬声器时能输出最大 2x30W 的功率，电能转化效率可达 94%，无需使用散热元件，内含过热保护、过流保护、过压保护、直流和欠压保护及故障报告功能。</br>RT9121 属于 I<sup>2</sup>S 器件，通过接收外来时钟驱动其工作。它可支持 Master 和 Slave 两种模式，输入信号的采样率范围为 8kHz-192kHz，其内含数据通道完全可程控，最终将数据引导至扬声器驱动电路。</br>RT9121 包含三段 DRC 和灵活的多段四边滤波器，可消除暴烈声，对输出功率进行限制，实现扬声器均衡。
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<li class="mv5"> 电压输入范围<br>► PVDD = 4.5V-26.4V<br>► DVDD 与 I/O：1.8V 或 3.3V</li><li class="mv5"> 支持众多音频格式<br>► 分辨率最高可达 32 位<br>► 支持多达 32 位的 TDM 格式输出<br>► 信号采样率：8kHz-192kHz</li><li class="mv5"> 卓越的音频性能<br>► 24V 供电、8Ω BTL 负载功率：2x30W<br>► SNR：110dB<br>► 效率：94%</li><li class="mv5"> 内建可程控 DSP<br>► 40 个可程控四边滤波器作扬声器均衡<br>► DRC 滤波器参数可调，支持多压缩比<br>► 可程控 256-tap FIR 滤波器</li><li class="mv5"> 卓越的自保护设计<br>► 输入欠压闭锁、过压保护、过流保护、热折返、过热保护和直流保护<br>► 内建直流阻断滤波器</li><li class="mv5"> 无需外加滤波器</li><li class="mv5"> 内含 HiFi-3 DSP、160kB SRAM</li><li class="mv5"> PWM 频率可调，最高达 1.5MHz</li><li class="mv5"> VQFN-48L 热强化封装</li><li class="mv5"> 符合 RoHS 规范，不含卤素</li>
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<li class="mv5"> 液晶电视</li><li class="mv5"> 显示器</li><li class="mv5"> 家用音响</li><li class="mv5"> 娱乐设备</li><li class="mv5"> 电子音乐设备</li>
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