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R7731 是一款高性能、低成本、低啟動電流的電流模式 PWM 控制器。它具有三重叢發模式 (Burst Triple Mode)，以支援綠能模式省電操作。R7731 整合了軟啟動功能、欠壓鎖定（UVLO）、前緣遮蔽（LEB）、過溫保護（OTP）和內部斜率補償。它提供用戶一個優異的，更高效率、較低外部元件數、較低成本的解決方案的 AC / DC 電源應用。為保護外部功率 MOSFET 不受電源過電壓的損壞，將R7731輸出驅動器限定在12V。此外，R7731 尚具備多項保護功能，如超載保護（OLP）和過壓保護（OVP），能省去外部保護電路，並提供可靠的操作。 R7731 是採用 SOT-23-6 和 DIP-8 封裝。
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<div class="spec-list"><ul class="lv1"><li>極低的啟動電流 (<30μA) </li><li>10/14V欠壓鎖定 (UVLO) </li><li>軟啟動功能 </li><li>電流模式控制 </li><li>可抖動的切換頻率 </li><li>內部前緣遮沒 </li><li>內建斜率補償 </li><li>支援綠能模式的三重叢發模式 (Burst Triple Mode) PWM </li><li>逐週期電流限制 </li><li>回授開路保護 </li><li>過壓保護 </li><li>過溫保護 </li><li>超載保護 </li><li>抑制電磁干擾 (EMI) 的軟啟動 </li><li>可驅動±200mA </li><li>高雜訊抗擾性 </li><li>光耦合器短路保護 </li><li>符合RoHS標準及不含鹵素 </li></ul></div>
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<div class="spec-list"><ul class="lv1"><li>變壓器和電池充電器 </li><li>ATX 待機電源 </li><li>機上盒 (STB) </li><li>DVD and CD(R) </li><li>電視/顯示器待機電源 </li><li>電腦周邊 </li></ul></div>
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