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(yi)高達950mA的電(dian)流(liu)對單節(jie)鋰離子/聚合(he)物電(dian)池(chi)充電(dian)，器件(jian)或其周(zhou)邊組件(jian)并無過熱風險。 

   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)兩個分立組件（輸入電容器和充電電流編(bian)程電阻），其扁平（0.75mm）8引線2mm x 2mm DFN封(feng)裝可以放入尺寸緊(jin)湊(cou)的(de)空(kong)間中。應用包(bao)括數(shu)碼相機、便攜(xie)式銷(xiao)售點和診斷設(she)備(bei)、蜂窩電話、無線頭戴(dai)式耳機、媒體播放器和配備(bei)USB接口的(de)手持式設(she)備(bei)。 

   LTC4095無需外(wai)部(bu)MOSFET、檢(jian)(jian)測電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻或隔離二極管(guan)。在(zai)大功率(lv)或高(gao)環境(jing)溫(wen)度工作(zuo)時，已(yi)獲專利的(de)(de)(de)熱調(diao)節(jie)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路通(tong)過降低(di)充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流以防(fang)止該(gai)集成(cheng)電(dian)(dian)(dian)(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)(dian)(dian)(dian)阻輸入用(yong)(yong)于(yu)進行溫(wen)度合格的(de)(de)(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(ke)(ke)采(cai)用(yong)(yong)現售的(de)(de)(de)標準電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻調(diao)節(jie)。該(gai)器(qi)件可(ke)(ke)于(yu)高(gao)達5.5V的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源工作(zuo)，包括(kuo)符合USB規范的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源和5V交流適配(pei)器(qi)。在(zai)暫停模式，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(di)于(yu)2uA。LTC4095還(huan)具有4種(zhong)充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)指示(shi)狀態(tai)，包括(kuo)閃(shan)光、電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池失效檢(jian)(jian)測、用(yong)(yong)于(yu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)量(liang)測量(liang)的(de)(de)(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(qi)輸出、一個準確(que)度為(wei)0.6%的(de)(de)(de)4.2V浮動(dong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓和5%的(de)(de)(de)充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)準確(que)度。 

   LTC4095的額(e)定工作溫度范圍為-40℃至85℃。以1,000片(pian)為單位批(pi)量購買，每片(pian)起價為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(cheng)充電電流范圍為100mA至950mA，準確度(du)為5% 

HPWR和SUSP輸入面向(xiang)USB充電應(ying)用 

具(ju)C/10充電電流檢測輸出的安全定(ding)時器終止 

無需(xu)外部MOSFET、檢測電阻(zu)或隔(ge)離二極管 

熱量反饋在無過熱風險的前提下(xia)最(zui)大限度(du)地提高充電速(su)率 

NTC熱敏(min)電(dian)阻輸入用(yong)于(yu)溫度合格的充電(dian) 

具0.6%準確度(du)的預置4.2V充電(dian)電(dian)壓 

充電(dian)電(dian)流監視器(qi)輸出用于(yu)電(dian)量(liang)檢測 

暫停(ting)模(mo)式電(dian)池(chi)漏電(dian)流低于2uA 

暫停模(mo)式電(dian)源電(dian)流< 11uA 

壞電(dian)池檢測 

扁平（0.75mm）8引線(xian)（2mm x 2mm）DFN封裝