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RT7789B 系列是一款增強型高效率多模式 PWM Flyback 控制器，採用立錡專有的 PowerZero<sup>TM</sup> 與 SmartJitter<sup>TM</sup> 技術。創新的 PowerZero<sup>TM</sup> 技術具備整合式 HV 元件，可提供優異的綠色電源解決方案，而 SmartJitter<sup>TM</sup> 技術可降低綠色模式下切換式電源供應器的 EMI 輻射，並消除因頻率抖動所造成的輸出漣波。此外，RT7789B 系列具備多模式控制機制，可從連續導通模式 (CCM) 運作至具谷底切換的不連續導通模式 (DCM)，以實現高效率與最佳效能。RT7789B 是一款用於 Flyback 轉換器的電流模式 PWM 控制器，整合完整且可程式化的保護功能，包括 brown-in/brown-out 保護、VDD 過壓保護 (VDD OVP)、輸出過壓與欠壓保護 (Output OVP and UVP)、二次側整流器短路保護 (SRSP)，以及外部過溫保護 (External OTP)。對於恆定輸出功率調節，可使用連接至 CS 腳位的電阻，在通用輸入電壓範圍內實現精準的線路補償。憑藉這些功能，RT7789B 可讓使用者針對各種 AC-DC 轉換應用實現具成本效益且精簡的設計。
RT7789B 電路圖
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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 訂購資訊
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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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