凌力爾特公司（Linear Technology Corporation）日前推出纖巧、全集成、獨立線性電池充電器LTC4095，該器件以(yi)高達(da)950mA的電(dian)流對單節鋰離子/聚(ju)合物(wu)電(dian)池充電(dian)，器件或其周(zhou)邊組件并(bing)無(wu)過熱風險。 

   這個全功能USB兼容集成電路具有數字“大功率選擇（High Power Select）”（充電電流設置為編程值的100%或20%）和“暫停模式輸入（Suspend Mode Input）”引腳，另外還有NTC熱敏電阻輸入、涓流充電、具C/10檢測的定時器終止和自動再充電功能。獨立工作不再需要采用微處理器終止充電。用LTC4095組成的完整充電器解決方案僅需(xu)要兩個分立組件（輸入電容器和(he)充(chong)電電流編程(cheng)電阻(zu)），其扁平(ping)（0.75mm）8引線2mm x 2mm DFN封裝可以放入尺(chi)寸緊湊的(de)空間(jian)中。應用(yong)包(bao)括數碼相機、便(bian)攜(xie)式銷售點和(he)診斷設備(bei)(bei)、蜂窩電話(hua)、無線頭(tou)戴式耳機、媒體播放器和(he)配備(bei)(bei)USB接口的(de)手持式設備(bei)(bei)。 

   LTC4095無需外部MOSFET、檢測(ce)電(dian)(dian)(dian)(dian)(dian)阻(zu)或隔離(li)二極(ji)管。在(zai)大功率或高環(huan)境溫(wen)度(du)工(gong)作時(shi)，已獲專利的(de)(de)(de)熱調節電(dian)(dian)(dian)(dian)(dian)路通過降(jiang)低充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)以防(fang)止(zhi)該(gai)集(ji)成電(dian)(dian)(dian)(dian)(dian)路的(de)(de)(de)結溫(wen)超過105℃。NTC熱敏電(dian)(dian)(dian)(dian)(dian)阻(zu)輸(shu)入用(yong)于(yu)進行溫(wen)度(du)合(he)格的(de)(de)(de)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)。充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)可采用(yong)現售的(de)(de)(de)標準(zhun)電(dian)(dian)(dian)(dian)(dian)阻(zu)調節。該(gai)器件可于(yu)高達5.5V的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)源(yuan)工(gong)作，包括符合(he)USB規范的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)源(yuan)和(he)5V交(jiao)流(liu)(liu)適(shi)配(pei)器。在(zai)暫停模式，電(dian)(dian)(dian)(dian)(dian)源(yuan)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)僅為11uA，電(dian)(dian)(dian)(dian)(dian)池(chi)漏電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)低于(yu)2uA。LTC4095還(huan)具有4種(zhong)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)指示狀態，包括閃光、電(dian)(dian)(dian)(dian)(dian)池(chi)失效檢測(ce)、用(yong)于(yu)電(dian)(dian)(dian)(dian)(dian)池(chi)電(dian)(dian)(dian)(dian)(dian)量測(ce)量的(de)(de)(de)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)監視器輸(shu)出、一個(ge)準(zhun)確度(du)為0.6%的(de)(de)(de)4.2V浮動(dong)電(dian)(dian)(dian)(dian)(dian)壓和(he)5%的(de)(de)(de)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)準(zhun)確度(du)。 

   LTC4095的額定工作溫度范圍(wei)為-40℃至85℃。以1,000片為單位批量購買，每(mei)片起(qi)價(jia)為1.15美(mei)元。 

LTC4095性能概要： 

采用2mm x 2mm DFN封裝的完整/獨立線性充電器 

可編(bian)程充(chong)電電流(liu)范圍為100mA至950mA，準確度(du)為5% 

HPWR和SUSP輸入(ru)面向USB充電應(ying)用(yong) 

具C/10充電電流檢(jian)測輸出的安全定時器終止 

無需外部MOSFET、檢測電(dian)阻(zu)或(huo)隔離二極管 

熱(re)量(liang)反饋在無過熱(re)風險的前提(ti)(ti)下最大限度地(di)提(ti)(ti)高充電速(su)率(lv) 

NTC熱(re)敏電阻輸入(ru)用于(yu)溫度合格的充(chong)電 

具0.6%準確度的預置(zhi)4.2V充電電壓(ya) 

充電(dian)電(dian)流監視器輸出(chu)用(yong)于(yu)電(dian)量(liang)檢測 

暫停模式電池漏電流低于2uA 

暫停模式電源電流< 11uA 

壞電池檢測 

扁平（0.75mm）8引(yin)線(xian)（2mm x 2mm）DFN封裝(zhuang)