專(zhuan)為移動消費電(dian)(dian)(dian)子設(she)備提供(gong)電(dian)(dian)(dian)源管理(li)半導體(ti)器(qi)件，日前宣布推出一個(ge)覆蓋全面(mian)的(de)產品線――USB/AC電(dian)(dian)(dian)池充電(dian)(dian)(dian)器(qi)芯片，用于(yu)以單塊4.2V(4.375V)鋰離子/聚合物電(dian)(dian)(dian)池供(gong)電(dian)(dian)(dian)的(de)便攜式系統(tong)。這些新型器(qi)件在高度緊湊的(de)空間內(nei)融(rong)合了(le)多種性能，而僅需(xu)一個(ge)外部組件，在小至2.0×2.1mm的(de)封裝內(nei)可提供(gong)完整(zheng)的(de)USB/AC充電(dian)(dian)(dian)功能。 

    內置數(shu)字熱調(diao)節 

    該新產品系列中的AAT3683芯片的單輸入USB/AC充電器支持高至1A的(de)可調(diao)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)，其運行的(de)電(dian)(dian)(dian)(dian)(dian)(dian)壓輸(shu)入范圍是4.0V至6.5V，并(bing)(bing)且內(nei)(nei)置(zhi)(zhi)了一個充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)裝置(zhi)(zhi)、反向阻斷二極(ji)管及(ji)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)感應電(dian)(dian)(dian)(dian)(dian)(dian)路，可用于對(dui)4.2V(4.375V)鋰(li)離子/聚(ju)合物電(dian)(dian)(dian)(dian)(dian)(dian)池(chi)的(de)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)壓和電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)進行調(diao)節(jie)。這款電(dian)(dian)(dian)(dian)(dian)(dian)池(chi)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)器芯(xin)片采用了由AnalogicTech開發并(bing)(bing)擁有專利的(de)數字熱調(diao)節(jie)電(dian)(dian)(dian)(dian)(dian)(dian)路，它可以在晶(jing)圓內(nei)(nei)部溫(wen)(wen)度超過預(yu)設溫(wen)(wen)度時自動(dong)降(jiang)低(di)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)，對(dui)器件進行過熱保(bao)護(hu)。這一功能可在一組給定(ding)(ding)的(de)輸(shu)入-輸(shu)出、功耗及(ji)環境(jing)溫(wen)(wen)度條件下(xia)，有助于最大限度地(di)保(bao)持電(dian)(dian)(dian)(dian)(dian)(dian)池(chi)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)，并(bing)(bing)在最短的(de)時間內(nei)(nei)完成充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)。此(ci)外，AAT3683還添加了一個內(nei)(nei)置(zhi)(zhi)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)計(ji)時器：當損壞的(de)電(dian)(dian)(dian)(dian)(dian)(dian)池(chi)在預(yu)定(ding)(ding)時長(chang)內(nei)(nei)無(wu)法接收電(dian)(dian)(dian)(dian)(dian)(dian)荷(he)時，充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)計(ji)時器將自動(dong)關(guan)閉(bi)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)功能。 

    AAT3684是一款單(dan)輸入USB/AC適配(pei)器充電器，它在15mA至500mA的充電電流(liu)范圍(wei)內可(ke)調。作為一項標(biao)準功能，該器件(jian)可(ke)為電池預(yu)處理(li)提供(gong)自動涓流(liu)充電。另外，AAT3684-1版本不帶有涓流(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(xin)(xin)片(pian)的(de)衍生(sheng)產品，專為(wei)需要(yao)從USB或AC電(dian)源(yuan)產生(sheng)500mA的(de)空間限制(zhi)型便攜式(shi)應用而(er)設計，采用高度緊湊的(de)2.0×2.1mm SC70JW封裝。這款電(dian)池充(chong)(chong)電(dian)器芯(xin)(xin)片(pian)與其(qi)前身(shen)的(de)不同之處在于，它還具有多(duo)種選擇(ze)，如涓流充(chong)(chong)電(dian)功能(neng)、高低(di)電(dian)平(ping)有效使能(neng)，以(yi)及充(chong)(chong)電(dian)終止(zhi)閾門電(dian)流設置(zhi)等(deng)。 

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

    價(jia)格與(yu)供貨 

    這三款(kuan)芯片的額定工作溫度范(fan)圍是-40至+85℃。AAT3681A采(cai)用(yong)無鉛、8引(yin)腳、2×2.1mm SC70JW封裝，現已供貨，訂貨量為1,000片時每片單價為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(feng)裝(zhuang)，現已(yi)供貨(huo)(huo)，訂(ding)貨(huo)(huo)量(liang)為1,000片(pian)時每片(pian)單價0.98美元。AAT3684采用(yong)10引腳(jiao)2.2×2.2mm STDFN封(feng)裝(zhuang)，現已(yi)供貨(huo)(huo)，訂(ding)貨(huo)(huo)量(liang)為1,000片(pian)時每片(pian)單價0.92美元。