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Product Spec Banner
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RT8547 是高效率、大电流的升压型闪光灯LED驱动器，能够提供最大1.6A输出电流，是在所有的单节锂离子/聚合物电池供电产品的LED照相闪光灯应用的理想电源解决方案。</br>RT8547借由切换内部高端和低端功率开关开关电晶体来保持输出电流调节，功率开关脉宽调制频率为2MHz的固定频率。高操作频率使RT8547可使用较小的电感和输出电容，适用于小型电池供电的应用。</br>单线调光控制功能设计用于通过闪光灯LED的FLSET引脚设定闪控模式电流层级。</br>RT8547包含过压保护、过流保护和过温保护功能以保护器件免受输出开路和短路情况。内置的内部软启动控制电路防止在启动期间冲击电流过大。在关断模式下，电源消耗仅2μA。
RT8547 电路图
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<div class="spec-list"><ul class="lv1"><li>2.8V~5.5V 输入电压范围 </li><li>电流精度在5%之内 </li><li>高达1.6A调节输出电流 </li><li>使用小型电感，效率可高达 88% </li><li>2MHz开关频率 </li><li>分离的闪控和手电筒模式电流 </li><li>可程式设计的安全计时器 </li><li>输入电流限制 </li><li>LED开路的过压保护 </li><li>过温保护 </li><li>确实断开负载连接 </li><li>关机电流 : <2μA </li></ul></div>
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RT8547 订购信息
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RT8547
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RT8547
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<div class="spec-list"><ul class="lv1"><li>行动电话 </li><li>数位相机 </li><li>PDA及智慧型手机 </li><li>可擕式仪器 </li><li>高性能 DSP、FPGA和 ASIC供电 </li></ul></div>
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