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跟著便攜電腦的標準越來越小，重量越來越輕，早年作為電腦的“小尾巴”的電源適配器現在好像要叫“大尾巴”了!電源適配器怎樣完結小型化，來配得上越做越小的便攜電腦則成為一項有必要考慮的問題。 本文引用地址：http://www.eepw.com.cn/article/201709/364368.htm從功率器件展開來看，從NPN型功率器件展開到MOS管功率器件只用了大約10年的時間，功率器件的標準縮小了5倍;而在運用硅MOS管的30年期間，器件的標準并沒有進步許多，功率雖然有10%的進步，但是器件標準縮小還不到10%;直到包含GaN在內的新材料出現后，不到3年的時間，功率器件的功率及標準的進步又繼續加快。在未來的十年，估量將在2025年再次進步3~5倍，其他，功率也會抵達95%~99%。由此看來，新材料的展開會是功率器件展開的重要促進要素之一。
圖1 功率器件的展開 作為世界上第一家也是僅有的氮化鎵(GaN)功率IC公司，納微(Navitas)也正是看到了這一展開規則，最早選用新式GaN功率芯片——AllGaNTM。新式功率芯片為功率器件帶來了速度和功率兩方面的進步。 由于硅材料的結構特性所限，一貫無法一同滿意速度和功率作為功率器件的兩大規劃參看方針。AllGaNTM通過配備新式拓撲——有源鉗位反激 (ACF) 拓撲結構和新材料，并將驅動和GaN集成到一同，然后完結開關速度和功率兩者的一同進步。新功率器件能夠供應高達400MHz的開關速度，其速度比典型的變換器規劃快了3至4倍，損耗下降40%，密度進步達5倍，系統本錢也會下降20%，然后完結更小的標準和更低的本錢。該規劃完全符合歐盟CoC Tier 2及美國能源部6級 (DoE VI) 所標準的能效標準，更在滿負載下完結超越94%的最高尖峰功率。
圖2 AllGaNTM功率IC器件結構 單芯片GaN功率IC與半橋GaN功率IC 納微在推出AllGaNTM平臺后，針對新式材料GaN先后推出了兩類功率IC，即單芯片GaN功率IC和半橋芯片GaN功率IC。 納微單芯片GaN功率IC是一款在650V下的單片式集成產品。該款產品選用5mm x 6mm QFN標準封裝�？紤]到本錢問題，納微單芯片GaN功率IC整個系列只用了這樣一個封裝方式。驅動選用內置驅動，高壓信號輸入時，即可實輕松現功率變換。納微一同創始人兼首席執行官Gene Sheridan介紹稱，通過這樣的驅動器整合，以軟開關為例將單芯片GaN功率IC與硅器件對比的話，硅器件電壓上升速度很快，會有陰影。而選用單芯片GaN功率IC器件，開關速度到1M時，開關電壓為500V，由此可見，選用單芯片GaN功率IC器件完全沒有開關損耗， EMI功能也很好。
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