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RT5509是具有邊緣切割喇叭保護演算法的單聲道BTL D放大器。此外,採用DC-DC升壓轉換器可為D類放大器提供有效的電源。I2S介面支援兩種不同的音頻源,而一對輔助DATAI / O用於立體聲模式或直通應用。晶片信息包括增益、喇叭保護輸出或電流檢測能夠通過DATAO通過適當的寄存器設置進行監控。揚聲器保護提供機械/熱保護,精準度為額定限制的10%/±10°C。
D類聲道功率放大器►4.3W輸出電源 @ 9.5V, 8Ω Load, THD < 1%►0/3/6/9/12/15/18dB Boost Gain►20μV輸出噪音 @ 0dB Gain
升壓轉換器►適性的升壓喇叭,將電池的供電提升到設定電壓,最大值可達9.5V►電源模式:適性的升壓,固定升壓,旁路模式►切換頻率 2MHz,最大輸出電流 1.5A►支援CCM/DCM補償,ADC回饋►數位部分:升壓模式內的電壓迴路
數位►支援I2S數位音頻介面,左右對齊►I2S採樣率支援高達48kHz, 24-bit►數位濾波器,數位音量,DRC/噪音門►喇叭保護►喇叭幅度估計精準度:誤差 < 10% ►B1校準功能►溫度檢測►喇叭溫度估算精準度:誤差 < ±10°C
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