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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。I2S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。
D类声道功率放大器►4.3W输出电源 @ 9.5V, 8Ω Load, THD < 1%►0/3/6/9/12/15/18dB Boost Gain►20μV输出噪音 @ 0dB Gain
升压转换器►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►电源模式：适性的升压，固定升压，旁路模式►切换频率 2MHz，最大输出电流 1.5A►支持CCM/DCM补偿，ADC回馈►数字部分：升压模式内的电压回路
数字►支持I2S数字音频接口，左右对齐►I2S采样率支持高达48kHz, 24-bit►数字滤波器，数字音量，DRC/噪音门►喇叭保护►喇叭幅度估计精准度：误差 < 10% ►B1校准功能►温度检测►喇叭温度估算精准度：误差 < ±10°C
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