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RT8565 是能驱动6只 LED 的高效率 LED 驱动器,它集成了 26V/0.9A 的功率开关和萧基二极体,是固定工作频率为 600kHz 的电流模式 Boost 转换器,输入电压范围为 2.8V~4.5V 。驱动 LED 的电流可用一只外部电阻进行设定,回馈电压设定在 200mV 。在工作期间,一个内置的 6位DAC 对 LED 亮度进行控制,用户可以很容易地通过 EN 端子对 LED 电流进行调节。在进行电流调节期间, RT8565 不会让电流发生突然的变化,因而不会在输出电容上出现音讯杂讯。RT8565 的内部还有过压保护设定来预防输出电压超过器件的额定值,这是 LED 处于开路状态时的最大风险。RT8565 的封装类型是小型的 WQFN-8L 1.6x1.6 。
RT8565 电路图
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<div class="spec-list"><ul class="lv1"><li>内置萧基二极体 </li><li>内置软起动和补偿电路 </li><li>64级脉冲调光方式 </li><li>LED 开路保护 </li><li>内部设定过压保护点 </li><li>过温保护 </li><li>过电流保护 </li><li>符合 RoHS 规范,不含卤素 </li></ul></div>
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RT8565 订购信息
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RT8565
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RT8565
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<div class="spec-list"><ul class="lv1"><li>GPS<font size="4">,</font> Portable DVD Backlight </li><li>Mobile Phone<font size="4">,</font> Smart Phone </li></ul></div>
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