專(zhuan)為移動消費電(dian)(dian)子設備提(ti)供(gong)電(dian)(dian)源(yuan)管理半導體器(qi)件，日前宣(xuan)布推出一(yi)個覆蓋全(quan)面的(de)產(chan)品線――USB/AC電(dian)(dian)池(chi)充電(dian)(dian)器(qi)芯片，用(yong)于以單塊(kuai)4.2V(4.375V)鋰(li)離(li)子/聚合(he)物電(dian)(dian)池(chi)供(gong)電(dian)(dian)的(de)便攜式系(xi)統。這些新型(xing)器(qi)件在高度緊湊(cou)的(de)空間(jian)內融(rong)合(he)了多種性能，而僅需一(yi)個外部組件，在小至(zhi)2.0×2.1mm的(de)封裝(zhuang)內可提(ti)供(gong)完整(zheng)的(de)USB/AC充電(dian)(dian)功能。 

    內(nei)置數字熱調(diao)節(jie) 

    該新產品系列中的AAT3683芯片的單輸入USB/AC充電器支(zhi)持高至1A的(de)(de)(de)可調充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)流(liu)，其運行(xing)的(de)(de)(de)電(dian)(dian)(dian)(dian)壓輸入范圍是4.0V至6.5V，并(bing)且(qie)內(nei)置(zhi)了(le)一(yi)(yi)個充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)裝置(zhi)、反向阻斷二極管及(ji)電(dian)(dian)(dian)(dian)流(liu)感應電(dian)(dian)(dian)(dian)路，可用(yong)于(yu)對4.2V(4.375V)鋰(li)離子/聚合物電(dian)(dian)(dian)(dian)池的(de)(de)(de)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)壓和電(dian)(dian)(dian)(dian)流(liu)進(jin)行(xing)調節(jie)。這款(kuan)電(dian)(dian)(dian)(dian)池充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)器(qi)芯片采用(yong)了(le)由AnalogicTech開發并(bing)擁有專利的(de)(de)(de)數字熱調節(jie)電(dian)(dian)(dian)(dian)路，它可以在晶圓(yuan)內(nei)部溫(wen)(wen)(wen)度超(chao)過(guo)預設溫(wen)(wen)(wen)度時(shi)自動(dong)降低充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)流(liu)，對器(qi)件進(jin)行(xing)過(guo)熱保(bao)護。這一(yi)(yi)功(gong)能可在一(yi)(yi)組給定的(de)(de)(de)輸入-輸出(chu)、功(gong)耗及(ji)環境溫(wen)(wen)(wen)度條件下(xia)，有助于(yu)最大限度地保(bao)持電(dian)(dian)(dian)(dian)池充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)流(liu)，并(bing)在最短(duan)的(de)(de)(de)時(shi)間內(nei)完(wan)成(cheng)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)。此(ci)外，AAT3683還添加了(le)一(yi)(yi)個內(nei)置(zhi)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)計(ji)(ji)時(shi)器(qi)：當損(sun)壞的(de)(de)(de)電(dian)(dian)(dian)(dian)池在預定時(shi)長內(nei)無法接收電(dian)(dian)(dian)(dian)荷時(shi)，充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)計(ji)(ji)時(shi)器(qi)將自動(dong)關閉充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)功(gong)能。 

    AAT3684是一款(kuan)單輸入USB/AC適配(pei)器(qi)充(chong)電器(qi)，它在15mA至500mA的充(chong)電電流(liu)范圍內可(ke)調。作為一項標(biao)準功(gong)能，該(gai)器(qi)件可(ke)為電池(chi)預處理提供自動涓流(liu)充(chong)電。另外(wai)，AAT3684-1版本不帶有涓流(liu)充(chong)電功(gong)能，可(ke)供使(shi)用者選擇。 

    AAT3681A是AnalogicTech在2006年4月推出(chu)的AAT3681芯片(pian)的衍生產品，專(zhuan)為需要從USB或AC電源產生500mA的空間限(xian)制(zhi)型便攜式應用而設(she)計，采(cai)用高(gao)度緊(jin)湊的2.0×2.1mm SC70JW封裝。這款電池充電器芯片(pian)與其前(qian)身的不同之處(chu)在于，它還具有(you)多種選擇，如涓流充電功(gong)能、高(gao)低電平有(you)效使(shi)能，以(yi)及充電終止閾門電流設(she)置等。 

    每一款新充電器芯片皆具有(you)過壓、短路及過熱保護。AAT3683還添加了(le)過流保護功能。 

    價格與(yu)供貨(huo) 

    這三款芯片的額定工作溫度(du)范(fan)圍是-40至(zhi)+85℃。AAT3681A采用無鉛、8引(yin)腳、2×2.1mm SC70JW封裝，現(xian)已(yi)供貨(huo)(huo)，訂貨(huo)(huo)量為1,000片時(shi)每(mei)片單(dan)價為0.81美元(yuan)。 

    AAT3683采用(yong)無鉛、10引腳(jiao)2.2×2.2mm STDFN和16引腳(jiao)QFN-33封裝(zhuang)，現已供(gong)貨(huo)，訂貨(huo)量(liang)為(wei)1,000片(pian)時每(mei)(mei)片(pian)單(dan)價(jia)0.98美(mei)元(yuan)。AAT3684采用(yong)10引腳(jiao)2.2×2.2mm STDFN封裝(zhuang)，現已供(gong)貨(huo)，訂貨(huo)量(liang)為(wei)1,000片(pian)時每(mei)(mei)片(pian)單(dan)價(jia)0.92美(mei)元(yuan)。