專為移(yi)動(dong)消(xiao)費電(dian)子(zi)設備提供電(dian)源管理半導體器件(jian)，日前宣布推(tui)出(chu)一個覆蓋全面的(de)(de)產(chan)品線――USB/AC電(dian)池(chi)充(chong)(chong)電(dian)器芯片，用于以單塊4.2V(4.375V)鋰離子(zi)/聚合物(wu)電(dian)池(chi)供電(dian)的(de)(de)便攜式系統。這些新型器件(jian)在(zai)高(gao)度緊湊(cou)的(de)(de)空間(jian)內融(rong)合了多種性能(neng)，而(er)僅需一個外(wai)部組件(jian)，在(zai)小至2.0×2.1mm的(de)(de)封裝內可(ke)提供完整的(de)(de)USB/AC充(chong)(chong)電(dian)功能(neng)。 

    內置(zhi)數字熱調(diao)節 

    該新產品系列中的AAT3683芯片的單輸入USB/AC充電器支持(chi)高至1A的(de)可(ke)調充(chong)(chong)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)，其(qi)運行的(de)電(dian)(dian)(dian)(dian)壓輸入范(fan)圍是4.0V至6.5V，并且內(nei)(nei)(nei)置了一個充(chong)(chong)電(dian)(dian)(dian)(dian)裝置、反向(xiang)阻斷二極管及電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)感應電(dian)(dian)(dian)(dian)路(lu)，可(ke)用于對4.2V(4.375V)鋰離子/聚合物(wu)電(dian)(dian)(dian)(dian)池的(de)充(chong)(chong)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)壓和電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)進行調節。這(zhe)款電(dian)(dian)(dian)(dian)池充(chong)(chong)電(dian)(dian)(dian)(dian)器(qi)芯片采用了由AnalogicTech開發并擁(yong)有專利的(de)數字熱調節電(dian)(dian)(dian)(dian)路(lu)，它可(ke)以在(zai)(zai)晶圓內(nei)(nei)(nei)部溫(wen)度超(chao)過(guo)預設溫(wen)度時(shi)自動降(jiang)低(di)充(chong)(chong)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)，對器(qi)件進行過(guo)熱保護(hu)。這(zhe)一功(gong)能(neng)可(ke)在(zai)(zai)一組給定的(de)輸入-輸出、功(gong)耗及環境溫(wen)度條件下，有助于最(zui)大限度地保持(chi)電(dian)(dian)(dian)(dian)池充(chong)(chong)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)，并在(zai)(zai)最(zui)短的(de)時(shi)間(jian)內(nei)(nei)(nei)完(wan)成充(chong)(chong)電(dian)(dian)(dian)(dian)。此外(wai)，AAT3683還添加了一個內(nei)(nei)(nei)置充(chong)(chong)電(dian)(dian)(dian)(dian)計時(shi)器(qi)：當損(sun)壞(huai)的(de)電(dian)(dian)(dian)(dian)池在(zai)(zai)預定時(shi)長內(nei)(nei)(nei)無法接收(shou)電(dian)(dian)(dian)(dian)荷時(shi)，充(chong)(chong)電(dian)(dian)(dian)(dian)計時(shi)器(qi)將自動關(guan)閉充(chong)(chong)電(dian)(dian)(dian)(dian)功(gong)能(neng)。 

    AAT3684是一款單輸(shu)入USB/AC適配器(qi)充電(dian)(dian)器(qi)，它在15mA至500mA的充電(dian)(dian)電(dian)(dian)流范圍(wei)內(nei)可(ke)調。作為(wei)(wei)一項標準功能(neng)，該器(qi)件可(ke)為(wei)(wei)電(dian)(dian)池預處(chu)理提供自動涓(juan)流充電(dian)(dian)。另外，AAT3684-1版本不帶有涓(juan)流充電(dian)(dian)功能(neng)，可(ke)供使用者選擇。 

    AAT3681A是AnalogicTech在2006年4月(yue)推出的(de)AAT3681芯片(pian)的(de)衍(yan)生產品，專(zhuan)為需要從USB或AC電(dian)源產生500mA的(de)空間(jian)限(xian)制型(xing)便攜式應用(yong)而設計，采(cai)用(yong)高(gao)度(du)緊(jin)湊的(de)2.0×2.1mm SC70JW封裝(zhuang)。這款電(dian)池(chi)充(chong)電(dian)器芯片(pian)與其前身的(de)不同之(zhi)處(chu)在于，它(ta)還具(ju)有(you)多種(zhong)選擇，如涓流充(chong)電(dian)功能、高(gao)低電(dian)平(ping)有(you)效使能，以及充(chong)電(dian)終(zhong)止閾門電(dian)流設置等。 

    每一款新充電器芯片皆具(ju)有過壓、短路及過熱保(bao)護。AAT3683還添(tian)加了過流(liu)保(bao)護功能。 

    價格與供(gong)貨 

    這(zhe)三款芯片的額定工(gong)作溫度范圍是(shi)-40至+85℃。AAT3681A采(cai)用(yong)無(wu)鉛、8引腳、2×2.1mm SC70JW封裝，現已供(gong)貨，訂貨量(liang)為1,000片時每片單價為0.81美元。 

    AAT3683采用無鉛、10引腳2.2×2.2mm STDFN和16引腳QFN-33封裝，現(xian)已(yi)(yi)供(gong)貨(huo)(huo)，訂(ding)貨(huo)(huo)量為1,000片(pian)時每片(pian)單(dan)價(jia)0.98美(mei)元(yuan)。AAT3684采用10引腳2.2×2.2mm STDFN封裝，現(xian)已(yi)(yi)供(gong)貨(huo)(huo)，訂(ding)貨(huo)(huo)量為1,000片(pian)時每片(pian)單(dan)價(jia)0.92美(mei)元(yuan)。