鋰離子充電電池具有能量密度高、容易制作成各種形狀和尺寸，因此在消費類電子產品中被廣泛使用。但鋰電池需要精確的充電電流和輸出電壓，以優化電池壽命和性能。為了滿足這一需求，飛思卡爾半導體公司推出了MC34671、MC34673和MC34674單輸入自動電池充電器集成電(dian)(dian)路(lu)。這些器件(jian)采用了(le)飛思卡爾的(de)SMARTMOS工藝(yi)技(ji)術，輸入(ru)(ru)電(dian)(dian)壓可(ke)來(lai)自AC適配器或USB端(duan)口電(dian)(dian)源(yuan)。器件(jian)的(de)最大(da)輸入(ru)(ru)電(dian)(dian)壓為28V，因此可(ke)以取消手(shou)持設備的(de)外部輸入(ru)(ru)過電(dian)(dian)壓保護(hu)電(dian)(dian)路(lu)，有助于降低系統成本和電(dian)(dian)路(lu)板空間。

　　芯(xin)片(pian)內部有(you)寄存器，飛思卡爾可以根據客戶的(de)需求，在生產(chan)流(liu)(liu)程(cheng)結束時(shi)(shi)對管腳(jiao)輸(shu)出、功能(neng)(neng)集和(he)(he)充電(dian)(dian)(dian)(dian)(dian)(dian)參數(shu)、LED指示(shi)(shi)燈(deng)進(jin)行定制(zhi)，從而組合成(cheng)數(shu)百種配(pei)置，滿(man)足手機(ji)、藍牙耳機(ji)、數(shu)碼(ma)相(xiang)機(ji)、個人媒(mei)體播放器、導航(hang)系(xi)統、數(shu)碼(ma)相(xiang)機(ji)和(he)(he)旅行充電(dian)(dian)(dian)(dian)(dian)(dian)器等設備的(de)需求。出廠前可編程(cheng)參數(shu)包括：輸(shu)出電(dian)(dian)(dian)(dian)(dian)(dian)壓、輸(shu)入過電(dian)(dian)(dian)(dian)(dian)(dian)壓保護、充電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)、涓流(liu)(liu)充電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)、涓流(liu)(liu)充電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)壓閾(yu)值(zhi)、終(zhong)(zhong)止(zhi)充電(dian)(dian)(dian)(dian)(dian)(dian)(EOC)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)、再(zai)充電(dian)(dian)(dian)(dian)(dian)(dian)閾(yu)值(zhi)、熱(re)折返(fan)閾(yu)值(zhi)、超時(shi)(shi)和(he)(he)核查濾波器定時(shi)(shi)。工廠可重(zhong)新配(pei)置的(de)功能(neng)(neng)包括：可編程(cheng)指示(shi)(shi)燈(deng)管腳(jiao)功能(neng)(neng)、ISET管腳(jiao)(電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)套)、負溫度系(xi)數(shu)(NTC)接(jie)(jie)口選擇、電(dian)(dian)(dian)(dian)(dian)(dian)池連接(jie)(jie)檢(jian)驗、終(zhong)(zhong)止(zhi)充電(dian)(dian)(dian)(dian)(dian)(dian)(EOC)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)和(he)(he)遠程(cheng)傳感。

　　MC34671的最大充電電流為600mA，過壓保護電壓為11V，可通過外部電阻設定充電電流，涓流充電電流ITRK=0.2ICC，截止充電電流IEOC=0.1ICC；MC34673的最大充電電流為1.2A，過壓保護電壓為6.8V，可通過外部電阻設定充電電流，涓流充電電流ITRK=0.2ICC，截止充電電流IEOC=0.1ICC；MC34674的初始固定充電電流可設定為50mA~1050mA，涓流充電電流ITRK=0.1ICC，截止充電電流IEOC=0.1ICC，過壓保護電壓為11V，具有超時檢測、NTC和智能電池檢測功能，適用于旅行充電器。即將推(tui)出的MC34672支持USB充電，其他規格與(yu)前三款器件基(ji)本相同。

　　MC34671和(he)MC34673在(zai)-20℃～+70℃溫(wen)(wen)度(du)(du)范圍內(nei)(nei)的輸出(chu)電(dian)壓精(jing)度(du)(du)為(wei)(wei)±0.7%(室溫(wen)(wen)下為(wei)(wei)±0.2%)，在(zai)-40℃~+85℃溫(wen)(wen)度(du)(du)范圍內(nei)(nei)的充電(dian)電(dian)流精(jing)度(du)(du)為(wei)(wei)±5%和(he)±6%。MC34674在(zai)-20℃~+70℃溫(wen)(wen)度(du)(du)范圍內(nei)(nei)的輸出(chu)電(dian)壓精(jing)度(du)(du)為(wei)(wei)±0.2%，在(zai)-40℃~+85℃溫(wen)(wen)度(du)(du)范圍內(nei)(nei)的充電(dian)電(dian)流精(jing)度(du)(du)為(wei)(wei)±8%。高輸出(chu)電(dian)壓精(jing)度(du)(du)的好處(chu)是(shi)可延長電(dian)池的使用壽命，最(zui)大限(xian)度(du)(du)地實現充電(dian)容量。

　　這些器(qi)件(jian)內部(bu)集成(cheng)了防(fang)止電(dian)池反向(xiang)放電(dian)的場效(xiao)應(ying)晶體管（FET）、阻塞二極管，也無需檢流(liu)電(dian)阻，可(ke)降低系統成(cheng)本。器(qi)件(jian)還有充電(dian)電(dian)流(liu)熱(re)(re)過載保護功能，既可(ke)以在(zai)有限的空間中最大限度地利用充電(dian)電(dian)流(liu)，又不用擔心(xin)熱(re)(re)設計的問題(ti)。這些器(qi)件(jian)具(ju)有過電(dian)壓保護、過電(dian)流(liu)保護和過熱(re)(re)溫度補償功能，采(cai)用2mm×3mm×0.65mm的超(chao)薄型雙扁平無引線(UDFN)耐熱(re)(re)封裝。