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Product Spec Banner
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R7779 是一款高性能、电流模式、有高压启动组件整合在内的 PWM 控制器。在启动过程中，为能有快速启动，电流源通过整合的高压组件对 VDD 电容器充电，而它在一般正常操作时是不会消耗功率的。R7779 提供用户一个优异的、有更高效率、少量外部组件、低成本解决方案的 AC/DC 电源应用。<br>在微小型 SOP-8 封装之下，它还具有频率抖动，欠压锁定 (UVLO)，前缘遮蔽 (LEB)，内部斜率补偿等特点。它提供了过温保护 (OTP)，过负载保护 (OLP)，和过压保护 (OVP) 等完整的保护。<br>此外，它也提供了当转换器处于睡眠模式时，零功率应用的一种特殊界面。 EN/DIS 接脚从次级纯量控制器接收 ON/OFF 信号。在电源关闭时，控制器可完全关闭，只需相当低的功耗。
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<div class="spec-list"><ul class="lv1"><li>整合的高压启动组件 </li><li>9V/16.5V欠压锁定 (UVLO) </li><li>电流模式控制 </li><li>内建 65kHz 操作频率 </li><li>内建可抖动的频率 </li><li>内部 PWM 前缘遮没 </li><li>内部斜率补偿 </li><li>补偿三重丛发模式 </li><li>逐周期电流限制 </li><li>内部自动还原过压保护 (OVP) </li><li>内部自动还原超载保护 (OLP) </li><li>内部自动还原过温保护 (OTP) </li><li>CS 接脚开路保护 </li><li>次级整流器短路保护 </li><li>抑制电磁干扰的软启动 </li><li>高噪声抗扰性 </li></ul></div>
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<div class="spec-list"><ul class="lv1"><li>AC/DC 变压器 </li><li>电视和显示器应用 </li><li>低待机功耗家电 </li></ul></div>
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