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Product Spec Banner
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RT7740MA 是一款增强型高效率多模式 PWM 反激式控制器（Flyback Controller），并整合立锜科技专有的 SmartJitter™ 技术。此创新技术可在绿色节能模式（Green Mode）下有效降低开关式电源供应器的电磁干扰（EMI）辐射，同时消除因频率抖动（Frequency Jittering）所产生的输出涟波，以兼顾低 EMI 与优异的输出性能。 在运作过程中，RT7740MA 采用多模式控制架构，可根据负载条件自动于连续导通模式（CCM, Continuous Conduction Mode）与非连续导通模式（DCM, Discontinuous Conduction Mode）之间切换，并搭配谷底切换（Valley Switching）技术，以获得更高的转换效率及最佳化的整体性能表现。 RT7740MA 为电流模式 PWM 控制器，专门针对反激式电源转换器应用而设计，并整合多项可程式化保护功能，包括传播延迟补偿（Propagation Delay Compensation）、输出过压保护（OVP）、外部过温保护（OTP），以及大电容欠压启动/关机保护（Bulk-Capacitor Brown-In/Brown-Out Protection）。 凭藉上述功能，RT7740MA 可协助设计人员实现兼具高效率、低成本及小尺寸的 AC-DC 电源转换方案，适用于各类宽输入范围电源应用。 RT7740MA 采用 SOT-23-6 封装。
RT7740MA 电路图
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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 订购信息
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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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