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RT7789B 系列是一款增强型高效率多模式 PWM Flyback 控制器，采用立锜专有的 PowerZero<sup>TM</sup> 与 SmartJitter<sup>TM</sup> 技术。创新的 PowerZero<sup>TM</sup> 技术具备整合式 HV 元件，可提供优异的绿色电源解决方案，而 SmartJitter<sup>TM</sup> 技术可降低绿色模式下切换式电源供应器的 EMI 辐射，并消除因频率抖动所造成的输出涟波。此外，RT7789B 系列具备多模式控制机制，可从连续导通模式 (CCM) 运作至具谷底切换的不连续导通模式 (DCM)，以实现高效率与最佳效能。RT7789B 是一款用于 Flyback 转换器的电流模式 PWM 控制器，整合完整且可程式化的保护功能，包括 brown-in/brown-out 保护、VDD 过压保护 (VDD OVP)、输出过压与欠压保护 (Output OVP and UVP)、二次侧整流器短路保护 (SRSP)，以及外部过温保护 (External OTP)。对于恒定输出功率调节，可使用连接至 CS 脚位的电阻，在通用输入电压范围内实现精准的线路补偿。凭藉这些功能，RT7789B 可让使用者针对各种 AC-DC 转换应用实现具成本效益且精简的设计。
RT7789B 电路图
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<div class="spec-list"><ul class="lv1"><li>Proprietary PowerZero<sup>TM</sup> Technology <ul class="lv2"> <li></li><li>Integrating a 700V Start-up Device </li><li>Brown-In/Brown-Out Protection </li></ul> </li><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), and DCM with Valley Switching </li><li>Accurate Over-Current Protection (OCP) </li><li>Programmable Line Compensation </li><li>Programmable Output OVP and UVP </li><li>Programmable External OTP </li><li>Driver Capability : 300mA/-300mA </li><li>High Noise Immunity </li><li>RoHS Compliant and Halogen Free </li></ul></div>
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RT7789B 订购信息
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RT7789B
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RT7789B
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<div class="spec-list"><ul class="lv1"><li>Switching AC-DC Adapter </li><li>NB Adapter </li><li>Printer Adapter </li></ul></div>
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