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Product Spec Banner
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RT8555 是一款用于白光 LED 的高效率驱动器。它适用于单节 / 两节电池输入，以驱动包含六串并联且每串最多 10 颗 WLED 的 LED 灯条。内部电流灌入器支持最大 ±2% 电流不匹配，可在每串 LED 中实现优异的亮度均匀性。为提供电流灌入器运行所需的足够余量，升压控制器会监测反馈引脚的最低电压，并调节优化输出电压以提升电源效率。RT8555 具备 2.7V 至 24V 的宽输入电压工作范围，并包含 I<sup>2</sup>C 接口，用于控制调光模式、工作频率与 LED 电流。内部 100mΩ、36V 功率开关搭配电流模式控制，可提供过电流保护。RT8555 的开关频率可在 300kHz 至 2MHz 之间调节，可在效率与元件尺寸之间提供灵活性。RT8555 采用 WL-CSP-20B 1.65 x 2.05 (BSC)，间距 0.4mm 封装。
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<div class="spec-list"><ul class="lv1"><li>宽输入电压范围 : 2.7V ~ 24V </li><li>高输出电压 : 高达36V </li><li>可程序设计通道电流 : 10mA ~ 35mA </li><li>±3%精准度与±2%匹配误差的通道电流调节 </li><li>调光控制 <ul class="lv2"> <li></li><li>直接PWM调光可达20kHz，最小导通时间400ns </li><li>PWM转模拟调光可达20kHz和8位分辨率 </li></ul> </li><li>I<sup>2</sup>C可编程LED电流，开关频率，调光模式 </li><li>OTP内嵌式内存 </li><li>切换频率 : 300kHz ~ 2MHz </li><li>保护 <ul class="lv2"> <li></li><li>LED串开路侦测 </li><li>电流限制 </li><li>可程序设计的过压保护 </li><li>过热保护 </li></ul> </li><li>20脚WL-CSP，0.4mm间距封装 </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>平板及笔记本电脑背光源 </li></ul></div>
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