專為移動消費電子設備(bei)提供電源管(guan)理半(ban)導(dao)體器件(jian)，日前宣布推(tui)出(chu)一個覆蓋全面(mian)的(de)產品(pin)線――USB/AC電池充(chong)電器芯片，用于(yu)以單塊4.2V(4.375V)鋰離(li)子/聚(ju)合物電池供電的(de)便攜式(shi)系統。這些新型器件(jian)在高度(du)緊湊的(de)空間內融(rong)合了多(duo)種性能，而僅(jin)需一個外部組件(jian)，在小至2.0×2.1mm的(de)封裝內可提供完整(zheng)的(de)USB/AC充(chong)電功能。 

    內(nei)置數(shu)字熱(re)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(diao)充(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)電(dian)(dian)(dian)流(liu)(liu)(liu)，其運行(xing)(xing)的(de)電(dian)(dian)(dian)壓(ya)輸入(ru)范圍(wei)是4.0V至6.5V，并且內(nei)(nei)置了一(yi)(yi)個充(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)裝置、反向阻斷二極管及電(dian)(dian)(dian)流(liu)(liu)(liu)感應(ying)電(dian)(dian)(dian)路，可(ke)用于(yu)對(dui)4.2V(4.375V)鋰離(li)子(zi)/聚合物電(dian)(dian)(dian)池的(de)充(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)電(dian)(dian)(dian)壓(ya)和電(dian)(dian)(dian)流(liu)(liu)(liu)進行(xing)(xing)調(diao)節。這(zhe)款電(dian)(dian)(dian)池充(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)器芯片采用了由(you)AnalogicTech開發并擁有專(zhuan)利(li)的(de)數字熱(re)調(diao)節電(dian)(dian)(dian)路，它可(ke)以(yi)在(zai)晶(jing)圓內(nei)(nei)部溫(wen)(wen)度(du)超過(guo)預設(she)溫(wen)(wen)度(du)時(shi)自動降低充(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)電(dian)(dian)(dian)流(liu)(liu)(liu)，對(dui)器件進行(xing)(xing)過(guo)熱(re)保護(hu)。這(zhe)一(yi)(yi)功(gong)能可(ke)在(zai)一(yi)(yi)組給定的(de)輸入(ru)-輸出、功(gong)耗及環(huan)境溫(wen)(wen)度(du)條件下，有助(zhu)于(yu)最大限度(du)地保持(chi)電(dian)(dian)(dian)池充(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)電(dian)(dian)(dian)流(liu)(liu)(liu)，并在(zai)最短的(de)時(shi)間內(nei)(nei)完成充(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)。此外，AAT3683還(huan)添加了一(yi)(yi)個內(nei)(nei)置充(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)計時(shi)器：當損壞的(de)電(dian)(dian)(dian)池在(zai)預定時(shi)長內(nei)(nei)無(wu)法接(jie)收電(dian)(dian)(dian)荷時(shi)，充(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)計時(shi)器將自動關閉充(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)功(gong)能。 

    AAT3684是(shi)一(yi)款單輸入USB/AC適配器充電器，它在15mA至500mA的(de)充電電流(liu)范圍內可(ke)調。作為一(yi)項標準(zhun)功能，該器件(jian)可(ke)為電池預(yu)處理提(ti)供(gong)自動涓(juan)流(liu)充電。另外，AAT3684-1版本(ben)不帶有涓(juan)流(liu)充電功能，可(ke)供(gong)使用者選擇。 

    AAT3681A是AnalogicTech在2006年(nian)4月推出的(de)AAT3681芯片(pian)的(de)衍(yan)生(sheng)產(chan)品(pin)，專為(wei)需(xu)要(yao)從USB或AC電(dian)源產(chan)生(sheng)500mA的(de)空間限制(zhi)型便攜式應(ying)用(yong)而設計(ji)，采用(yong)高度緊湊(cou)的(de)2.0×2.1mm SC70JW封裝(zhuang)。這(zhe)款電(dian)池充(chong)電(dian)器芯片(pian)與其前身的(de)不(bu)同之(zhi)處在于，它還(huan)具(ju)有多(duo)種選擇，如涓流充(chong)電(dian)功能(neng)、高低電(dian)平有效(xiao)使能(neng)，以及充(chong)電(dian)終止閾門電(dian)流設置等(deng)。 

    每一款新充電器芯片皆具有過壓、短路及過熱保(bao)護。AAT3683還添加了過流保(bao)護功(gong)能。 

    價格(ge)與供貨 

    這三款芯片的額定(ding)工作溫度范圍(wei)是-40至+85℃。AAT3681A采用無鉛、8引腳、2×2.1mm SC70JW封裝，現已(yi)供貨，訂貨量為1,000片時每片單價(jia)為0.81美元(yuan)。 

    AAT3683采用無鉛(qian)、10引(yin)腳2.2×2.2mm STDFN和(he)16引(yin)腳QFN-33封裝，現已(yi)供(gong)貨，訂貨量為(wei)1,000片(pian)時每(mei)片(pian)單價0.98美(mei)元。AAT3684采用10引(yin)腳2.2×2.2mm STDFN封裝，現已(yi)供(gong)貨，訂貨量為(wei)1,000片(pian)時每(mei)片(pian)單價0.92美(mei)元。