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Product Spec Banner
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RT9759 是大电流、高效率的锂离子/锂聚合物电池充电 IC，最大充电电流可达 8A，电池电压 4.2V、充电电流为 2.5A 时的转换效率可达 97.8%。它采用智能电容分压架构，使用外加的过压保护电路，具有输入端反向阻断开关，可对电池充电电压和电流进行调节，拥有两组电荷泵内核，具有 15 种保护功能，提供 7 种报警信号，使用了具有 9 个输入通道的高速模拟-数字转换器对输入、输出电压/电流和温度等信息进行采集，这些信息可通过 I<SUP>2</SUP>C 接口进行上报。
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<div class="spec-list"><ul class="lv1"><li>使用外部OVP开关 <ul class="lv2"> <li></li><li>可耐受最高40V电压 </li><li>100ns内响应，100ns内关断 </li></ul> </li><li>可对电池充电参数进行调节 <ul class="lv2"> <li></li><li>电池充电电压调节(VBAT REG) </li><li>电池充电电流调节(IBAT REG) </li></ul> </li><li>使用输入反向阻断开关防止出现反向电流 </li><li>两组电荷泵内核 <ul class="lv2"> <li></li><li>8A 电流输出能力 </li><li>效率高达 97.8%（V<sub>BAT</sub> = 4.2V, I<sub>BAT</sub> = 2.5A） </li><li>250kHz~750kHz 可变工作频率，远离音频段 </li><li>使用扩频技术，EMI 水平低 </li></ul> </li><li>4 种电荷泵切换保护措施 <ul class="lv2"> <li></li><li>切换前 VBUS 电压过高保护 </li><li>切换前 VBUS 电压过低保护 </li><li>切换前 C<sub>FLY</sub> 短路保护 </li><li>开关导通期间过流保护 </li></ul> </li><li>10 种系统保护措施 <ul class="lv2"> <li></li><li>VBUS 过压保护 </li><li>IBUS 过流保护 </li><li>IBUS 欠流保护 </li><li>VOUT 过压保护 </li><li>VBAT 过压保护 </li><li>IBAT 过流保护 </li><li>输入、输出压差过高保护 </li><li>总线过热保护 </li><li>电池过热保护 </li><li>结温过高保护 </li></ul> </li><li>7 种系统警告信号 <ul class="lv2"> <li></li><li>VBUS 过压警告 </li><li>IBUS 过流警告 </li><li>VBAT 过压警告 </li><li>IBAT 过流警告 </li><li>IBAT 欠流警告 </li><li>总线、电池过热警告 </li><li>结温过高警告 </li></ul> </li><li>9 通道 12 位 ADC 高速数据转换，各通道 128 次转换数据均值作输出 </li></ul></div>
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<div class="spec-list"><ul class="lv1"><li>智能手机 </li><li>平板电脑 </li><li>个人电脑 </li></ul></div>
applicationContent
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