專為移動消費電(dian)子設備提供電(dian)源管理半(ban)導(dao)體器(qi)件，日前宣布推(tui)出一個(ge)覆蓋全面(mian)的產品線――USB/AC電(dian)池充電(dian)器(qi)芯片，用于以(yi)單塊4.2V(4.375V)鋰離子/聚(ju)合物電(dian)池供電(dian)的便攜式系統(tong)。這些新型(xing)器(qi)件在高度緊湊(cou)的空間內融合了多種性能，而僅(jin)需一個(ge)外部(bu)組件，在小至2.0×2.1mm的封裝內可提供完整的USB/AC充電(dian)功能。 

    內置數字(zi)熱調節(jie) 

    該新產品系列中的AAT3683芯片的單輸入USB/AC充電器支持(chi)高(gao)至1A的(de)可(ke)調(diao)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)，其運行的(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓輸(shu)入(ru)范圍是4.0V至6.5V，并(bing)且內(nei)(nei)置了一個(ge)(ge)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)裝置、反向阻斷二極管及電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)感(gan)應電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路，可(ke)用于對(dui)4.2V(4.375V)鋰離子/聚(ju)合物電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)的(de)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓和(he)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)進行調(diao)節。這款(kuan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器芯片(pian)采用了由AnalogicTech開發并(bing)擁有專利的(de)數字熱調(diao)節電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路，它可(ke)以在晶圓內(nei)(nei)部溫度(du)(du)超過預(yu)設(she)溫度(du)(du)時(shi)自動降(jiang)低充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)，對(dui)器件進行過熱保護。這一功能可(ke)在一組給定的(de)輸(shu)入(ru)-輸(shu)出、功耗及環境溫度(du)(du)條件下(xia)，有助于最大限(xian)度(du)(du)地保持(chi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)，并(bing)在最短的(de)時(shi)間內(nei)(nei)完成充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)。此外，AAT3683還添加了一個(ge)(ge)內(nei)(nei)置充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)計時(shi)器：當損壞的(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)在預(yu)定時(shi)長(chang)內(nei)(nei)無(wu)法(fa)接收電(dian)(dian)(dian)(dian)(dian)(dian)(dian)荷時(shi)，充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)計時(shi)器將自動關(guan)閉充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)功能。 

    AAT3684是一(yi)款單(dan)輸(shu)入USB/AC適配器充(chong)電器，它在15mA至500mA的充(chong)電電流范圍內可調。作為一(yi)項標準功能(neng)，該器件(jian)可為電池預處理提供(gong)自動涓(juan)流充(chong)電。另外，AAT3684-1版本不帶(dai)有涓(juan)流充(chong)電功能(neng)，可供(gong)使(shi)用者選擇。 

    AAT3681A是AnalogicTech在2006年4月(yue)推出(chu)的AAT3681芯片(pian)的衍生(sheng)產品，專為需要從USB或AC電(dian)源(yuan)產生(sheng)500mA的空(kong)間限制型便攜(xie)式應用而設(she)計，采用高度緊(jin)湊(cou)的2.0×2.1mm SC70JW封裝(zhuang)。這款電(dian)池充電(dian)器(qi)芯片(pian)與其(qi)前身的不同(tong)之處在于，它(ta)還(huan)具有(you)多種選擇，如涓流充電(dian)功(gong)能(neng)、高低電(dian)平有(you)效使能(neng)，以(yi)及充電(dian)終止閾門電(dian)流設(she)置等。 

    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(liu)保(bao)護功能(neng)。 

    價格與供貨(huo) 

    這三款芯(xin)片(pian)的額定工作溫度范圍是-40至+85℃。AAT3681A采用(yong)無鉛、8引腳、2×2.1mm SC70JW封裝，現已供(gong)貨，訂貨量為1,000片(pian)時(shi)每片(pian)單(dan)價為0.81美元(yuan)。 

    AAT3683采用(yong)無(wu)鉛、10引腳(jiao)(jiao)2.2×2.2mm STDFN和16引腳(jiao)(jiao)QFN-33封裝(zhuang)，現已供貨(huo)，訂貨(huo)量為(wei)1,000片時(shi)每片單(dan)價0.98美元。AAT3684采用(yong)10引腳(jiao)(jiao)2.2×2.2mm STDFN封裝(zhuang)，現已供貨(huo)，訂貨(huo)量為(wei)1,000片時(shi)每片單(dan)價0.92美元。