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Product Spec Banner
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RT9455 是适合便携式应用的开关模式单节锂离子/聚合物电池充电器，集成了同步 PWM 控制器、功率开关、输入电流检测、高精度电压调节和充电终止电路，支持 USB On-The-Go(OTG)应用。它以经过优化的控制策略进行不同模式下的充电速度调节，其模式包括预充模式、快充模式和恒压充电模式，所有关键的充电参数均可经过 I<sup>2</sup>C 接口进行编程。充电结束以后的电池电压下将到预设的阈值以下时，RT9455 会重启充电流程以弥补其电能损失。当外部电源移除以后，RT9455 自动进入睡眠模式以降低电池消耗。它还具有欠压保护、过压保护、温度调节和反向漏电保护等功能。其封装为 WL-CSP-16B 1.7x1.77(BSC)。
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<div class="spec-list"><ul class="lv1"><li>支持快速启动 </li><li>高精度电压/电流调节 </li><li>输入电流调节：100mA/500mA/700mA/1A </li><li>最低输入电压调节：4V/4.25V/4.5V </li><li>充电电压调节精度：±1%(0~85°C) </li><li>充电电流调节精度：±5% </li><li>内建输入电流检测和限制 </li><li>集成功率 MOSFET 开关，支持高达 1.55A 充电电流 </li><li>集成充电电流检测电阻 </li><li>1.5MHz 同步PWM 控制器，占空比可达 95% </li><li>反向漏电保护，预防电池漏电 </li><li>温度调整与保护功能 </li><li>过热保护 </li><li>输入过压保护 </li><li>I<sup>2</sup>C 通讯有中断请求输出 </li><li>自动完成充电过程 </li><li>符合 RoHS 规范，不含卤素 </li></ul></div>
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<div class="spec-list"><ul class="lv1"><li>移动电话 </li><li>个人信息设备 </li><li>MP3 播放器 </li><li>便携式仪器 </li></ul></div>
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