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RT9385B 是包含了 x1/x1.5/x2 升压模式的电荷泵和低压差恒流源的5通道 LED 驱动器，可为5只 LED 提供稳定一致的电流供应，每个 LED 通道的电流最大可达 25mA,它因具有 x1/x1.5/x2 多种升压模式和低压差的电流调节器而能维持最高的转换效率。内建的5位 DAC 可被用于进行亮度控制，用户可通过 EN 端子实现 LED 的32级控制。RT9385B 的可用封装是 WQFN-16L 2x3 的，小型的 1μF 电容可被用作泵电容与之配合工作，这为便携式设备提供了一个空间占用很少的高效背光驱动方案。
/content/dam/richtek-eds/resources/product-specifications/rt93/rt9385b/images/circuit/26714yzwzi.GIF
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<li class="mv5"> 在锂离子电池的全电压范围内平均效率可达85%</li><li class="mv5"> 支持多达5只 WLED</li><li class="mv5"> 每个通道输出电流最高达 25mA</li><li class="mv5"> 总输出电流高达 125mA</li><li class="mv5"> 灵活的32级亮度控制</li><li class="mv5"> 恒流源电压降为 60mV</li><li class="mv5"> 1%的 LED 电流精度</li><li class="mv5"> 0.7%的 LED 电流一致性</li><li class="mv5"> 电荷泵工作模式在 x1/x1.5/x2 上自动转换</li><li class="mv5"> 输入噪声低，EMI 问题少</li><li class="mv5"> 5V 过压保护</li><li class="mv5"> 加电/模式转换时无冲击过程</li><li class="mv5"> 1MHz 恒定工作频率</li><li class="mv5"> 0.4μA 低停机电流</li><li class="mv5"> 符合 RoHS 规范，不含卤素</li>
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<li class="mv5">Camera Phone<font size="4">,</font> Smart Phone </li><li class="mv5">White LED Backlighting</li>
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