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RT8966 是一款模拟子系统,于单一 mini/micro USB 连接器上集成线性充电器、4 个 LDO、4 通道电流源,以及用于 USB、UART、麦克风、立体声与音频的多路复用器。RT8966 采用 I<sup>2</sup>C 总线进行控制,并使用内部方法判断所连接的器件。USB 输入提供高速 USB 连接。音频输入具备负电源轨信号运行,可实现简单的 DC 耦合耳机扬声器。RT8966 通过使用 USB ID 信号引脚与 VBUS 电压,提供内部器件检测方法。电阻值与 VBUS 电压决定每个配件的唯一检测方式。主机微处理器采用 I<sup>2</sup>C 控制开关位置,并读取配件检测结果。RT8966 亦可检测 USB 充电器,包括专用充电器(D+/D- 短路)以及高功率主机 / 集线器充电器。RT8966 具备线性充电器,最大电流能力为 1A。充电电流与充电终止电流可通过 I<sup>2</sup>C 接口控制。它亦提供 50mA LDO,以支持外围电路的电源。在工厂模式下,RT8966 提供 4.35V/2.3A 电源,以支持系统运行。RT8966 采用薄型 WQFN-32L 4x4 封装,可实现针对 PCB 空间与散热考量优化的解决方案。
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<div class="spec-list"><ul class="lv1"><li>高速USB操作 </li><li>中断设备插拔 </li><li>中断SEND/END按钮侦测 </li><li>中断保护功能 </li><li>低功耗麦克风预备模式 </li><li>工厂支持默认启动模式 </li><li>负轨音频信号路径 </li><li>内置低噪声麦克风偏置LDO </li><li>28V最大额定直流适配器 </li><li>充电器内部整合功率MOSFET </li><li>支持4.35V/2.3A工厂测试模式 </li><li>I<sup>2</sup>C控制接口 </li><li>4道电流源与32阶电流设置 </li><li>4 LDOs与可程序设计的输出电压 </li><li>32引脚WQFN封装 </li><li>符合RoHS标准,不含卤素 </li></ul></div>
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<div class="spec-list"><ul class="lv1"><li>手机 </li><li>智能型手持装置 </li></ul></div>
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