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(qi)件以高達950mA的電流(liu)對單節鋰離子(zi)/聚合物電池充電，器(qi)件或其(qi)周邊組件并無(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要(yao)兩個分立(li)組(zu)件（輸入電容器(qi)和(he)充(chong)電電流編程電阻），其扁平(ping)（0.75mm）8引線2mm x 2mm DFN封裝可以放(fang)入尺寸(cun)緊(jin)湊的(de)(de)空間(jian)中。應(ying)用(yong)包(bao)括(kuo)數碼相機、便攜式(shi)銷售(shou)點和(he)診斷設(she)(she)備(bei)、蜂窩(wo)電話、無線頭戴式(shi)耳機、媒體(ti)播放(fang)器(qi)和(he)配備(bei)USB接口(kou)的(de)(de)手持式(shi)設(she)(she)備(bei)。 

   LTC4095無需外(wai)部MOSFET、檢測(ce)電(dian)(dian)(dian)(dian)(dian)阻或隔離(li)二極管。在(zai)大功率或高環境(jing)溫度工作時，已獲(huo)專利的(de)熱調節電(dian)(dian)(dian)(dian)(dian)路通過(guo)降低(di)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)流(liu)以(yi)防止該集成電(dian)(dian)(dian)(dian)(dian)路的(de)結溫超過(guo)105℃。NTC熱敏電(dian)(dian)(dian)(dian)(dian)阻輸入用(yong)于進(jin)行溫度合格的(de)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)。充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)流(liu)可采(cai)用(yong)現售的(de)標準(zhun)(zhun)電(dian)(dian)(dian)(dian)(dian)阻調節。該器件可于高達(da)5.5V的(de)電(dian)(dian)(dian)(dian)(dian)源工作，包括符合USB規范的(de)電(dian)(dian)(dian)(dian)(dian)源和5V交流(liu)適配器。在(zai)暫停(ting)模(mo)式，電(dian)(dian)(dian)(dian)(dian)源電(dian)(dian)(dian)(dian)(dian)流(liu)僅為(wei)(wei)11uA，電(dian)(dian)(dian)(dian)(dian)池漏電(dian)(dian)(dian)(dian)(dian)流(liu)低(di)于2uA。LTC4095還(huan)具有4種充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)指(zhi)示狀態，包括閃光、電(dian)(dian)(dian)(dian)(dian)池失(shi)效檢測(ce)、用(yong)于電(dian)(dian)(dian)(dian)(dian)池電(dian)(dian)(dian)(dian)(dian)量測(ce)量的(de)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)流(liu)監(jian)視器輸出、一個準(zhun)(zhun)確度為(wei)(wei)0.6%的(de)4.2V浮動電(dian)(dian)(dian)(dian)(dian)壓和5%的(de)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)準(zhun)(zhun)確度。 

   LTC4095的額定工作(zuo)溫度范圍為(wei)(wei)(wei)-40℃至(zhi)85℃。以1,000片(pian)為(wei)(wei)(wei)單位批量購買，每片(pian)起價(jia)為(wei)(wei)(wei)1.15美(mei)元。 

LTC4095性能概要(yao)： 

采用2mm x 2mm DFN封裝的完整/獨立線性充電器 

可編程充電電流(liu)范(fan)圍為(wei)100mA至950mA，準確度為(wei)5% 

HPWR和(he)SUSP輸入面向USB充電(dian)應用 

具C/10充(chong)電(dian)電(dian)流(liu)檢測輸出的(de)安全(quan)定時器終止 

無需外部MOSFET、檢測電(dian)阻(zu)或隔離二(er)極管 

熱(re)量反饋在無(wu)過熱(re)風險的前提下最大限度地提高充電(dian)速率 

NTC熱敏電阻(zu)輸入(ru)用(yong)于溫度合格(ge)的充(chong)電 

具0.6%準確度的預置(zhi)4.2V充電(dian)電(dian)壓 

充電電流監視器輸出(chu)用(yong)于電量(liang)檢測 

暫停模(mo)式電(dian)池漏電(dian)流低于2uA 

暫停(ting)模式電源電流(liu)< 11uA 

壞(huai)電池檢測 

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