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，該器件以高達950mA的電流(liu)對單節(jie)鋰離子(zi)/聚(ju)合物電池充電，器件或其周(zhou)邊(bian)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方案(an)僅需要兩個分(fen)立組件(jian)（輸(shu)入電(dian)容(rong)器和充電(dian)電(dian)流編程電(dian)阻），其扁平(ping)（0.75mm）8引線2mm x 2mm DFN封裝可以放(fang)入尺寸緊湊的空間中。應(ying)用(yong)包括數碼相機、便攜式(shi)(shi)銷售點和診斷設(she)備(bei)、蜂(feng)窩電(dian)話、無線頭戴式(shi)(shi)耳(er)機、媒體播(bo)放(fang)器和配(pei)備(bei)USB接口的手持式(shi)(shi)設(she)備(bei)。 

   LTC4095無需外部MOSFET、檢(jian)(jian)測(ce)電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)或(huo)隔(ge)離二極管。在(zai)大功率(lv)或(huo)高環境溫度工作(zuo)(zuo)時，已獲專利的(de)(de)熱調(diao)節電(dian)(dian)(dian)(dian)(dian)(dian)路通過降低(di)充電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)流以防止該(gai)集成(cheng)電(dian)(dian)(dian)(dian)(dian)(dian)路的(de)(de)結(jie)溫超過105℃。NTC熱敏電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)輸入用于進行溫度合格的(de)(de)充電(dian)(dian)(dian)(dian)(dian)(dian)。充電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)流可采用現售的(de)(de)標準(zhun)電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)調(diao)節。該(gai)器(qi)件可于高達5.5V的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)源工作(zuo)(zuo)，包括(kuo)(kuo)符合USB規(gui)范(fan)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)源和(he)(he)5V交流適配器(qi)。在(zai)暫停模式，電(dian)(dian)(dian)(dian)(dian)(dian)源電(dian)(dian)(dian)(dian)(dian)(dian)流僅為(wei)11uA，電(dian)(dian)(dian)(dian)(dian)(dian)池漏電(dian)(dian)(dian)(dian)(dian)(dian)流低(di)于2uA。LTC4095還具有4種充電(dian)(dian)(dian)(dian)(dian)(dian)指示狀態(tai)，包括(kuo)(kuo)閃(shan)光(guang)、電(dian)(dian)(dian)(dian)(dian)(dian)池失效檢(jian)(jian)測(ce)、用于電(dian)(dian)(dian)(dian)(dian)(dian)池電(dian)(dian)(dian)(dian)(dian)(dian)量(liang)測(ce)量(liang)的(de)(de)充電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)流監視器(qi)輸出、一個準(zhun)確(que)度為(wei)0.6%的(de)(de)4.2V浮動電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)和(he)(he)5%的(de)(de)充電(dian)(dian)(dian)(dian)(dian)(dian)準(zhun)確(que)度。 

   LTC4095的額定工作(zuo)溫度范圍為-40℃至85℃。以1,000片為單位批量購買，每片起(qi)價為1.15美元。 

LTC4095性能概要： 

采用2mm x 2mm DFN封裝的完整/獨立線性充電器 

可編程充電(dian)電(dian)流范圍為100mA至950mA，準確(que)度為5% 

HPWR和SUSP輸入面向USB充電應用 

具C/10充(chong)電電流檢測輸出的安全定時器終止 

無需外部(bu)MOSFET、檢(jian)測(ce)電阻或(huo)隔(ge)離(li)二極管 

熱量反饋(kui)在無過熱風險(xian)的前提下(xia)最(zui)大(da)限度地提高充(chong)電速率 

NTC熱(re)敏電阻(zu)輸入用于溫度合格的充電 

具0.6%準確度的預置4.2V充電電壓 

充電(dian)電(dian)流監視器輸出用于電(dian)量(liang)檢測(ce) 

暫(zan)停模式電池(chi)漏(lou)電流低于2uA 

暫停模式電(dian)源(yuan)電(dian)流< 11uA 

壞電池(chi)檢測 

扁平（0.75mm）8引線（2mm x 2mm）DFN封裝