專為移動(dong)消費電(dian)(dian)(dian)子(zi)設備提(ti)供電(dian)(dian)(dian)源管理(li)半導體器件(jian)，日前宣布推出一(yi)個覆蓋全面的(de)產品線――USB/AC電(dian)(dian)(dian)池(chi)充電(dian)(dian)(dian)器芯片，用于以單(dan)塊(kuai)4.2V(4.375V)鋰(li)離(li)子(zi)/聚合物電(dian)(dian)(dian)池(chi)供電(dian)(dian)(dian)的(de)便攜式系(xi)統。這(zhe)些(xie)新型器件(jian)在高度緊湊(cou)的(de)空間內融合了多種性能，而(er)僅需一(yi)個外(wai)部組件(jian)，在小(xiao)至(zhi)2.0×2.1mm的(de)封裝內可提(ti)供完整(zheng)的(de)USB/AC充電(dian)(dian)(dian)功(gong)能。 

    內(nei)置數字(zi)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(zhi)持高至(zhi)1A的(de)(de)(de)可調(diao)充(chong)(chong)(chong)電(dian)(dian)電(dian)(dian)流(liu)，其運行(xing)的(de)(de)(de)電(dian)(dian)壓(ya)輸入范圍是(shi)4.0V至(zhi)6.5V，并(bing)且內置(zhi)了一個充(chong)(chong)(chong)電(dian)(dian)裝置(zhi)、反(fan)向阻斷二極管及(ji)電(dian)(dian)流(liu)感應電(dian)(dian)路，可用(yong)于(yu)對4.2V(4.375V)鋰離子/聚合物(wu)電(dian)(dian)池的(de)(de)(de)充(chong)(chong)(chong)電(dian)(dian)電(dian)(dian)壓(ya)和(he)電(dian)(dian)流(liu)進(jin)行(xing)調(diao)節(jie)。這款電(dian)(dian)池充(chong)(chong)(chong)電(dian)(dian)器(qi)芯片采(cai)用(yong)了由AnalogicTech開發并(bing)擁有(you)專利的(de)(de)(de)數(shu)字熱(re)(re)調(diao)節(jie)電(dian)(dian)路，它可以在(zai)(zai)晶(jing)圓內部溫度(du)(du)超過(guo)預設溫度(du)(du)時(shi)(shi)自動(dong)降低充(chong)(chong)(chong)電(dian)(dian)電(dian)(dian)流(liu)，對器(qi)件進(jin)行(xing)過(guo)熱(re)(re)保護。這一功能可在(zai)(zai)一組給定(ding)的(de)(de)(de)輸入-輸出、功耗及(ji)環(huan)境溫度(du)(du)條件下，有(you)助于(yu)最大限(xian)度(du)(du)地保持電(dian)(dian)池充(chong)(chong)(chong)電(dian)(dian)電(dian)(dian)流(liu)，并(bing)在(zai)(zai)最短的(de)(de)(de)時(shi)(shi)間內完成充(chong)(chong)(chong)電(dian)(dian)。此外，AAT3683還添加(jia)了一個內置(zhi)充(chong)(chong)(chong)電(dian)(dian)計時(shi)(shi)器(qi)：當(dang)損(sun)壞的(de)(de)(de)電(dian)(dian)池在(zai)(zai)預定(ding)時(shi)(shi)長內無法接收電(dian)(dian)荷時(shi)(shi)，充(chong)(chong)(chong)電(dian)(dian)計時(shi)(shi)器(qi)將自動(dong)關閉充(chong)(chong)(chong)電(dian)(dian)功能。 

    AAT3684是(shi)一(yi)款單(dan)輸入USB/AC適配器(qi)(qi)充(chong)電(dian)器(qi)(qi)，它在15mA至500mA的充(chong)電(dian)電(dian)流范圍內可調。作為一(yi)項標(biao)準功(gong)能，該器(qi)(qi)件可為電(dian)池預處理提供自(zi)動涓流充(chong)電(dian)。另外，AAT3684-1版本不帶有涓流充(chong)電(dian)功(gong)能，可供使用者(zhe)選擇。 

    AAT3681A是(shi)AnalogicTech在2006年4月推出的(de)(de)AAT3681芯片(pian)的(de)(de)衍生產(chan)品(pin)，專為需要從(cong)USB或AC電(dian)(dian)源產(chan)生500mA的(de)(de)空間限制型便攜式應用(yong)而設(she)計，采用(yong)高度(du)緊湊的(de)(de)2.0×2.1mm SC70JW封裝。這款(kuan)電(dian)(dian)池充(chong)電(dian)(dian)器芯片(pian)與(yu)其前身的(de)(de)不同之(zhi)處(chu)在于，它還具有多(duo)種(zhong)選(xuan)擇(ze)，如(ru)涓(juan)流充(chong)電(dian)(dian)功(gong)能、高低電(dian)(dian)平(ping)有效使能，以及充(chong)電(dian)(dian)終止閾門電(dian)(dian)流設(she)置等(deng)。 

    每一款新充電器芯片皆具有(you)過(guo)壓、短(duan)路及過(guo)熱保護(hu)。AAT3683還(huan)添加了過(guo)流(liu)保護(hu)功能。 

    價格(ge)與供(gong)貨 

    ;這三款芯(xin)片的額定工作溫度范圍(wei)是(shi)-40至+85℃。AAT3681A采用無(wu)鉛、8引腳、2×2.1mm SC70JW封(feng)裝(zhuang)，現已(yi)供貨，訂(ding)貨量為1,000片時(shi)每片單價為0.81美元。 

    AAT3683采用無(wu)鉛、10引腳(jiao)(jiao)2.2×2.2mm STDFN和16引腳(jiao)(jiao)QFN-33封(feng)裝，現(xian)已供(gong)貨(huo)(huo)，訂貨(huo)(huo)量為1,000片時每(mei)片單價0.98美(mei)元。AAT3684采用10引腳(jiao)(jiao)2.2×2.2mm STDFN封(feng)裝，現(xian)已供(gong)貨(huo)(huo)，訂貨(huo)(huo)量為1,000片時每(mei)片單價0.92美(mei)元。