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(jian)以高達950mA的(de)電(dian)流對(dui)單(dan)節鋰離子/聚合(he)物電(dian)池充電(dian)，器(qi)件(jian)或(huo)其周邊組件(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(xu)要兩個分立組(zu)件(jian)（輸入(ru)電容器(qi)和充電電流編程電阻），其扁平（0.75mm）8引(yin)線(xian)2mm x 2mm DFN封裝可以放(fang)入(ru)尺寸緊湊的空間中(zhong)。應用包括數碼相機(ji)、便攜式銷售點和診(zhen)斷(duan)設(she)備、蜂窩電話、無線(xian)頭戴式耳機(ji)、媒體(ti)播放(fang)器(qi)和配備USB接口的手持式設(she)備。 

   LTC4095無需外部MOSFET、檢測電(dian)(dian)(dian)(dian)阻或(huo)隔離二極管。在(zai)大(da)功(gong)率或(huo)高環境(jing)溫(wen)度(du)(du)工(gong)作(zuo)時，已獲專利的(de)(de)熱調(diao)節電(dian)(dian)(dian)(dian)路通過降低充電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)以防止該(gai)集成電(dian)(dian)(dian)(dian)路的(de)(de)結溫(wen)超過105℃。NTC熱敏電(dian)(dian)(dian)(dian)阻輸(shu)入用(yong)于(yu)進行溫(wen)度(du)(du)合格的(de)(de)充電(dian)(dian)(dian)(dian)。充電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)可(ke)采用(yong)現售(shou)的(de)(de)標準(zhun)電(dian)(dian)(dian)(dian)阻調(diao)節。該(gai)器件可(ke)于(yu)高達5.5V的(de)(de)電(dian)(dian)(dian)(dian)源(yuan)工(gong)作(zuo)，包括符合USB規范的(de)(de)電(dian)(dian)(dian)(dian)源(yuan)和(he)5V交流(liu)(liu)(liu)適配器。在(zai)暫停(ting)模式，電(dian)(dian)(dian)(dian)源(yuan)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)僅(jin)為11uA，電(dian)(dian)(dian)(dian)池漏電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)低于(yu)2uA。LTC4095還具有4種充電(dian)(dian)(dian)(dian)指示狀態，包括閃(shan)光、電(dian)(dian)(dian)(dian)池失(shi)效檢測、用(yong)于(yu)電(dian)(dian)(dian)(dian)池電(dian)(dian)(dian)(dian)量(liang)測量(liang)的(de)(de)充電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)監視器輸(shu)出、一個準(zhun)確度(du)(du)為0.6%的(de)(de)4.2V浮動電(dian)(dian)(dian)(dian)壓和(he)5%的(de)(de)充電(dian)(dian)(dian)(dian)準(zhun)確度(du)(du)。 

   LTC4095的(de)額定工作溫度范圍為-40℃至85℃。以(yi)1,000片為單位批(pi)量購買，每片起價(jia)為1.15美元。 

LTC4095性能概(gai)要(yao)： 

采用2mm x 2mm DFN封裝的完整/獨立線性充電器 

可編程充電電流范圍為100mA至950mA，準確度為5% 

HPWR和(he)SUSP輸入面向USB充(chong)電(dian)應用 

具C/10充電(dian)電(dian)流(liu)檢(jian)測(ce)輸出的安(an)全定時器終止 

無需外部MOSFET、檢測電阻或隔離(li)二極管(guan) 

熱量反饋在(zai)無過熱風險的前提(ti)下最(zui)大限度地提(ti)高(gao)充電速(su)率 

NTC熱(re)敏電阻輸入用于溫度合格的充電 

具0.6%準確度的預(yu)置4.2V充電(dian)電(dian)壓(ya) 

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

暫停模式電(dian)池漏(lou)電(dian)流低于2uA 

暫停模式電(dian)源(yuan)電(dian)流< 11uA 

壞電池檢測 

扁平（0.75mm）8引線（2mm x 2mm）DFN封(feng)裝