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Product Spec Banner
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R7731A 是一款高性能、低成本、低启动电流的电流模式 PWM 控制器。它具有三重丛发模式 (Burst Triple Mode)，以支援绿能模式省电操作。R7731A 整合了软启动功能、欠压锁定（UVLO）、前缘遮蔽（LEB）、过温保护（OTP）和内部斜率补偿。它提供用户一个优异的，更高效率、较低外部元件数、较低成本的解决方案的 AC / DC 电源应用。为保护外部功率 MOSFET 不受电源过电压的损坏，将R7731A输出驱动器限定在12V。此外，R7731A 尚具备多项保护功能，如超载保护（OLP）和过压保护（OVP），能省去外部保护电路，并提供可靠的操作。 R7731A 是采用 SOT-23-6 和 DIP-8 封装。
R7731A 电路图
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<div class="spec-list"><ul class="lv1"><li>极低的启动电流 (<30μA) </li><li>10/14V欠压锁定 (UVLO) </li><li>软启动功能 </li><li>电流模式控制 </li><li>可抖动的切换频率 </li><li>内部前缘遮没 </li><li>内建斜率补偿 </li><li>支援绿能模式的三重丛发模式 (Burst Triple Mode) PWM </li><li>逐周期电流限制 </li><li>回授开路保护 </li><li>过压保护 </li><li>过温保护 </li><li>超载保护 </li><li>抑制电磁干扰 (EMI) 的软启动 </li><li>可驱动±200mA </li><li>高杂讯抗扰性 </li><li>光耦合器短路保护 </li><li>符合RoHS标准及不含卤素 </li></ul></div>
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R7731A 订购信息
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R7731A
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R7731A
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<div class="spec-list"><ul class="lv1"><li>变压器和电池充电器 </li><li>ATX 待机电源 </li><li>机上盒 (STB) </li><li>DVD and CD(R) </li><li>电视/显示器待机电源 </li><li>电脑周边 </li></ul></div>
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