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(jian)以高達950mA的(de)電(dian)流對單節鋰(li)離子(zi)/聚合物電(dian)池充(chong)電(dian)，器件(jian)或其周邊組(zu)件(jian)并無(wu)過熱(re)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(fang)案僅需要兩個分立組件（輸入電容器(qi)和充電電流(liu)編程(cheng)電阻），其扁平（0.75mm）8引(yin)線(xian)2mm x 2mm DFN封裝可以放(fang)入尺(chi)寸緊湊的(de)空(kong)間中(zhong)。應用包括數(shu)碼(ma)相機、便攜(xie)式銷售(shou)點和診斷設備、蜂(feng)窩電話、無(wu)線(xian)頭戴式耳機、媒體(ti)播放(fang)器(qi)和配(pei)備USB接口的(de)手(shou)持式設備。 

   LTC4095無需外部MOSFET、檢測(ce)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)或(huo)隔離(li)二極管。在大功率(lv)或(huo)高環境(jing)溫度工作(zuo)(zuo)時(shi)，已獲專利的(de)熱調(diao)節電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)通(tong)過(guo)降(jiang)低充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流以防止該(gai)(gai)集成(cheng)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)的(de)結溫超過(guo)105℃。NTC熱敏電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)輸入用(yong)于(yu)進行溫度合(he)格的(de)充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)。充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流可采(cai)用(yong)現(xian)售的(de)標準(zhun)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)調(diao)節。該(gai)(gai)器件可于(yu)高達5.5V的(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源工作(zuo)(zuo)，包括符合(he)USB規范的(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源和(he)5V交流適配器。在暫停模(mo)式，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流僅為(wei)11uA，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池漏電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流低于(yu)2uA。LTC4095還具有4種充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)指示狀態，包括閃(shan)光、電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池失效檢測(ce)、用(yong)于(yu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)量測(ce)量的(de)充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流監視器輸出(chu)、一個準(zhun)確(que)度為(wei)0.6%的(de)4.2V浮動電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)和(he)5%的(de)充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)準(zhun)確(que)度。 

   LTC4095的額定工(gong)作溫度范圍為-40℃至85℃。以1,000片為單位(wei)批量購(gou)買，每片起價(jia)為1.15美(mei)元。 

LTC4095性(xing)能概要： 

采用2mm x 2mm DFN封裝的完整/獨立線性充電器 

可編(bian)程充電(dian)電(dian)流范圍為100mA至(zhi)950mA，準確度為5% 

HPWR和SUSP輸入(ru)面(mian)向USB充電應用(yong) 

具C/10充(chong)電(dian)電(dian)流檢測輸出的安全定時器終(zhong)止 

無需外部(bu)MOSFET、檢測(ce)電阻或隔離二極(ji)管 

熱量反饋在無過熱風險的(de)前提(ti)下最(zui)大限度地(di)提(ti)高充(chong)電速(su)率 

NTC熱(re)敏電(dian)阻輸入用于溫度合格的充電(dian) 

具(ju)0.6%準確度的預置4.2V充(chong)電電壓(ya) 

充電(dian)(dian)電(dian)(dian)流(liu)監視器輸(shu)出用于(yu)電(dian)(dian)量(liang)檢測 

暫(zan)停模(mo)式(shi)電池漏電流低于2uA 

暫(zan)停(ting)模(mo)式電(dian)源電(dian)流< 11uA 

壞電池檢測(ce) 

扁平(ping)（0.75mm）8引線(xian)（2mm x 2mm）DFN封裝