本論文中，實現一個完全符合Intel® VR12.5的數位控制電壓調節模組。在提出的系統中，採用四相降壓轉換器拓撲。一個IR3581雙迴路數位多相式降壓控制晶片用來作為數位控制器，IR3578整合型同步降壓驅動IC用來實現功率級。使用數位控制器和整合型驅動晶片的優點包括更少的外圍元件和高設計靈活性。
IR3581控制器的主要功能包括數位控制補償、動態相位控制(Dynamic Phase Control, DPC)、主動式暫態演算法(Adaptive Transient Algorithm, ATA)，DPC根據負載電流自動增加/減少相位，將改善轉換器在輕負載條件下的效率；基於非線性控制PWM演算的ATA具有最大限度地減少輸出電容的數量。實驗結果驗證了所研製的系統能夠滿足Intel® VR12.5規範，且測量效率高於94%。

In this thesis, a digitally-controlled voltage regulation module (VRM) which is fully compliant with Intel® VR12.5 specifications is implemented. In the presented system, a four-phase buck converter topology is adopted. An IR3581 dual-loop digital multi-phase buck controller is utilized as the digital controller, and IR3578 integrated synchronous buck driver IC is used to implement the power stage. Advantages of using a digital controller and integrated driver chip include fewer peripheral components and high design flexibility.
Main features of IR3581 controller include digital compensator design, dynamic phase control (DPC) and adaptive transient algorithm (ATA). DPC automatically adds/drops phases based upon load current, which will improve the converter efficiency at light load condition. ATA based on non-linear digital PWM algorithms can minimize bulk output capacitors. Experimental results validate that the implemented system can meet the Intel® VR12.5 specifications, and the measured efficiency is higher than 94%.

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