87% 整體高效率及11μA極低待機電流的筆電整體電源管理利用彈性電壓調整及動態電壓調整技術

Abstract

在日常生活中的許多電器用品中，隔絕式的電源轉換器是不可或缺的，特別是電子產品充電器的應用，為各種攜帶式電子設備的電池補充能量以維持正常運作。在充電器的架構中，特別是反馳式轉換器，因為其基本電路架構簡單以及外部元件使用數較精簡，於是經常被選用在較低瓦數的應用。此論文提出一個使用反馳式轉換器架構來應用在筆電充電器的交流/直流電源模組。論文中所提出的應用在筆電的整體電源管理是透過動態電壓調整技術及彈性電壓調整技術的應用的整合，而能夠有效改善整體電路架構的轉換效率。而相較於傳統的只有動態電壓調整技術而沒有彈性電壓調整技術的轉換器，在輕載時整體效率提升12%，且最高整體電源效率提升7%。此外，論文中提出的綠能模式有效地降低晶片的靜態電流到11μA，並且抑制極輕載的功率，使損耗只有10mW，而這個損耗數值遠小於由歐洲能源之星所規範的待機損耗500mW以及許多市面上已販售產品的40mW。

For many electrical devices in our day life, power supply designed by an isolated converter is indispensable. Especially in low output power applications, the flyback converter is a better candidate. This thesis presents an AC/DC power module by designing an adapter for high efficiency laptops. The proposed overall power management (OPM) in laptops can improve the overall conversion efficiency by the flexible voltage scaling (FVS) technique in cooperation with conventional dynamic voltage scaling (DVS) technique. 12% light load efficiency and 7% peak efficiency are improved compared to conventional design with DVS technique only but without the FVS technique. The proposed green mode effectively reduces chip quiescent current to 11μA and suppresses ultra-light load power loss to 10mW, which is much smaller than 500mW standby power defined by the restriction of Energy Star Standard and 40mW of state-of-the-art commercial products.