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Product Spec Banner
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RT7740MA 是一款增強型高效率多模式 PWM 反激式控制器（Flyback Controller），並整合立錡科技專有的 SmartJitter™ 技術。此創新技術可在綠色節能模式（Green Mode）下有效降低開關式電源供應器的電磁干擾（EMI）輻射，同時消除因頻率抖動（Frequency Jittering）所產生的輸出漣波，以兼顧低 EMI 與優異的輸出性能。 在運作過程中，RT7740MA 採用多模式控制架構，可根據負載條件自動於連續導通模式（CCM, Continuous Conduction Mode）與非連續導通模式（DCM, Discontinuous Conduction Mode）之間切換，並搭配谷底切換（Valley Switching）技術，以獲得更高的轉換效率及最佳化的整體性能表現。 RT7740MA 為電流模式 PWM 控制器，專門針對反激式電源轉換器應用而設計，並整合多項可程式化保護功能，包括傳播延遲補償（Propagation Delay Compensation）、輸出過壓保護（OVP）、外部過溫保護（OTP），以及大電容欠壓啟動/關機保護（Bulk-Capacitor Brown-In/Brown-Out Protection）。 憑藉上述功能，RT7740MA 可協助設計人員實現兼具高效率、低成本及小尺寸的 AC-DC 電源轉換方案，適用於各類寬輸入範圍電源應用。 RT7740MA 採用 SOT-23-6 封裝。
RT7740MA 電路圖
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<div class="spec-list"><ul class="lv1"><li>Proprietary SmartJitter<sup>TM</sup> Technology <ul class="lv2"> <li></li><li>Reducing EMI Emissions of SMPS </li><li>Eliminating Frequency-Jittering-Induced Output Ripple </li></ul> </li><li>Operating in Continuous-Conduction Mode (CCM), Discontinuous-Conduction Mode (DCM), DCM with Valley-Switching </li><li>Ultra-Low Start-Up Current (< 3μA) </li><li>Accurate Over-Current Protection (OCP) </li><li>Programmable Line Compensation </li><li>Programmable Output Over-Voltage Protection </li><li>Programmable External Over-Temperature Protection </li><li>Programmable Bulk-Capacitor Brown-In/Brown-Out Protection </li><li>Driver Capability : 200mA/-300mA </li><li>High Noise Immunity </li></ul></div>
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RT7740MA 訂購資訊
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<div class="spec-list"><ul class="lv1"><li>Switching AC-DC Adapter </li><li>NB Adapter </li><li>TV/Monitor Standby Power </li><li>PC Peripherals </li></ul></div>
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