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RT5509是具有边缘切割喇叭保护算法的单声道BTL D放大器。此外，采用DC-DC升压转换器可为D类放大器提供有效的电源。I<SUP>2</SUP>S接口支持两种不同的音频源，而一对辅助DATAI / O用于立体声模式或直通应用。芯片信息包括增益、喇叭保护输出或电流检测能够通过DATAO通过适当的寄存器设置进行监控。扬声器保护提供机械/热保护，精准度为额定限制的10%/±10°C。
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<li class="mv5">D类声道功率放大器<br>►4.3W输出电源 @ 9.5V, 8Ω Load, THD < 1%<br>►0/3/6/9/12/15/18dB Boost Gain<br>►20μV输出噪音 @ 0dB Gain</li><li class="mv5">升压转换器<br>►适性的升压喇叭，将电池的供电提升到设定电压，最大值可达9.5V<br>►电源模式：适性的升压，固定升压，旁路模式<br>►切换频率 2MHz，最大输出电流 1.5A<br>►支持CCM/DCM补偿，ADC回馈<br>►数字部分：升压模式内的电压回路</li><li class="mv5">数字<br>►支持I<SUP>2</SUP>S数字音频接口，左右对齐<br>&#9658I<SUP>2</SUP>S采样率支持高达48kHz, 24-bit<br>►数字滤波器，数字音量，DRC/噪音门<br>►喇叭保护<br>►喇叭幅度估计精准度：误差 < 10%<br> &#9658B1校准功能<br>►温度检测<br>►喇叭温度估算精准度：误差 < ±10°C</li>
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<li class="mv5">智能型手机</li><li class="mv5">平板计算机</li>
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