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(gai)器件以高達950mA的電流對單(dan)節鋰離子(zi)/聚合物電池(chi)充電，器件或其(qi)周邊組件并無過(guo)熱風險(xian)。 

   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(jue)方案僅需要兩個分立組件（輸入(ru)電(dian)容器和充電(dian)電(dian)流編程電(dian)阻），其扁平（0.75mm）8引線2mm x 2mm DFN封裝(zhuang)可以放入(ru)尺寸(cun)緊湊的(de)(de)空間中。應用包括數碼相機、便攜式銷售點(dian)和診斷設(she)備、蜂窩電(dian)話、無線頭戴(dai)式耳機、媒體播放器和配備USB接(jie)口的(de)(de)手持(chi)式設(she)備。 

   LTC4095無(wu)需外部(bu)MOSFET、檢(jian)測(ce)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)或隔離(li)二(er)極管。在大(da)功率(lv)或高環境(jing)溫(wen)度工作時，已(yi)獲專利(li)的(de)(de)熱調節電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路通過降(jiang)低充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)以防止(zhi)該集成電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路的(de)(de)結溫(wen)超過105℃。NTC熱敏(min)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)輸入用于進行(xing)溫(wen)度合格的(de)(de)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)。充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)可采用現售的(de)(de)標(biao)準(zhun)(zhun)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)調節。該器(qi)件可于高達5.5V的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)工作，包括符合USB規范(fan)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)和5V交流(liu)適配器(qi)。在暫停模式(shi)，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)僅為11uA，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池漏電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)低于2uA。LTC4095還具(ju)有4種充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)指示狀態(tai)，包括閃光(guang)、電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池失(shi)效檢(jian)測(ce)、用于電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池電(dian)(dian)(dian)(dian)(dian)(dian)(dian)量測(ce)量的(de)(de)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)監視器(qi)輸出、一個準(zhun)(zhun)確度為0.6%的(de)(de)4.2V浮動電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)和5%的(de)(de)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)準(zhun)(zhun)確度。 

   LTC4095的(de)額定工作溫度范圍為(wei)(wei)(wei)-40℃至85℃。以(yi)1,000片為(wei)(wei)(wei)單位批量(liang)購買，每片起(qi)價為(wei)(wei)(wei)1.15美元。 

LTC4095性能(neng)概(gai)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)電電流范圍為(wei)100mA至950mA，準確度(du)為(wei)5% 

HPWR和SUSP輸入面向USB充電應(ying)用 

具C/10充電(dian)電(dian)流檢測輸出的安全定時(shi)器終止 

無需外部(bu)MOSFET、檢測電阻或隔離二極管 

熱(re)量(liang)反饋在無過(guo)熱(re)風險的前提下最大限度地提高充電速率 

NTC熱敏電(dian)阻(zu)輸入(ru)用于(yu)溫度(du)合格的充電(dian) 

具0.6%準確度的預置4.2V充電電壓(ya) 

充(chong)電(dian)電(dian)流監視器輸(shu)出用于電(dian)量檢測 

暫停模式電(dian)池漏電(dian)流低(di)于2uA 

暫停(ting)模式(shi)電(dian)源電(dian)流< 11uA 

壞(huai)電(dian)池檢測 

扁(bian)平（0.75mm）8引線(xian)（2mm x 2mm）DFN封裝