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RT9206为低单价,整合了PWM电压模式的降压型转换器控制器、两组高压型线性控制器的多组整合型转换器控制器,可直接驱动外部的N-MOSFET简易的实现具高效率与低价位的电源解决方案。电压模式的控制回路以及具备外部补偿网路的固定频率操作,在宽操作范围内提供了更佳的稳定性。可调的操作频率最高达600kHz可减少所需电感大小与PCB的设计面积。可适用于宽输入电压范围(4.75V至 28V)与多组输出的应用。线性控制器的特色为设计自由度高,输出功率的大小可借由所选择的N-MOSFET 决定,输出电压可由外接的电阻分压进行设计。0.8V的参考电压可满足大多数的设计应用。低电压闩锁功能可提供输出有效的保护。RT9206提供完整的保护功能:缓启动、过电流保护、过电压与低电压保护。可借由所选择的MOSFET以决定电流限制的大小。同步降压型控制模式借由开启低端MOSFET以达到过电压保护机制,防止在异常的过电压产生时,毁坏终端装置的情形发生。
RT9206 电路图
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<div class="spec-list"><ul class="lv1"><li>宽输入范围(4.75V 至 28V) </li><li>0.8V 内部参考电压 </li><li>高效率的同步降压型架构 </li><li>整合两组高压线性控制器 </li><li>低价位的N-MOSFET 设计 </li><li>责任周期 0% 至90%. </li><li>可调切换频率200kHz至600kHz,预设为 200kHz </li><li>可借由低端MOSFET R<sub>DS(ON)</sub> 感测OCP </li><li>电源良好信号指示 </li><li>符合RoHS规范与100%的引脚无铅特性 </li></ul></div>
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RT9206 订购信息
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<div class="spec-list"><ul class="lv1"><li>LCD Monitor </li><li>Desk Note </li><li>IEEE1394 Client </li><li>Desktop IA </li><li>Broadband </li></ul></div>
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