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Product Spec Banner
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RT4720AC是整合了三个DC-DC转换器的AMOLED用电源IC，含有2组升压电路和一组反相电路，分别为AMOLED显示器提供其需要的正负电压。<BR>于可擕式应用而言，板面空间和效率总是处于关注的焦点上，高频工作的RT4720AC容许使用低感量的电感器以实现板面空间的节约。它的负压输出和AVDD输出电压是可由MCU通过单线 (SWIRE引脚) 通讯来进行程式控制的，输出负压的范围为-1.4V至-5.4V，AVDD输出电压的范围是5.8V至7.9V。它还具有OTP、SCP、UVLO和过流保护功能，使用了WQFN-16L 3x3封装。
RT4720AC 电路图
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<div class="spec-list"><ul class="lv1"><li>Boost转换器输出AVDD正压的电压范围是5.8V至7.7V </li><li>Boost转换器提供给AMOLED的电源电压是4.6V </li><li>反相转换器提供给AMOLED的负压范围是-1.4V至-5.4V </li><li>供给AMOLED的正负压都具有高达300mA的负载能力 </li><li>AVDD固定5.8V或7.7V输出电压的最大输出电流可达50mA </li><li>典型效率峰值：90% (40mA至150mA) </li><li>PWM模式的工作频率为1.5MHz </li><li>输出电压精准度高 </li><li>极佳的线路、负载瞬变回应特性 </li><li>极佳的线路、负载调节性能 </li><li>通过SWIRE引脚即可对负压和AVDD输出电压进行程式控制 </li><li>有快速输出端放电功能 </li><li>关机模式下的电流消耗小于1μA </li><li>有内部软起动限制浪涌电流 </li><li>过热保护 (OTP) </li><li>过流保护 (OCP) </li><li>短路保护 (SCP) </li></ul></div>
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RT4720AC 订购信息
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<div class="spec-list"><ul class="lv1"><li>手机 </li><li>数位相机 </li><li>PDA和智慧型手机 </li><li>可携式设备 </li></ul></div>
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