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(gao)達950mA的電(dian)流對單節鋰離子/聚合物電(dian)池(chi)充電(dian)，器(qi)件(jian)或其周邊組件(jian)并無過熱(re)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(jue)方案僅需要(yao)兩個分立組(zu)件（輸入電(dian)容器和充(chong)電(dian)電(dian)流編程(cheng)電(dian)阻），其扁平（0.75mm）8引線2mm x 2mm DFN封裝可以放入尺寸(cun)緊湊的空(kong)間中。應用包括數碼(ma)相機、便攜(xie)式(shi)銷售點和診斷(duan)設備(bei)(bei)、蜂窩電(dian)話、無(wu)線頭戴(dai)式(shi)耳機、媒體播放器和配備(bei)(bei)USB接口的手持式(shi)設備(bei)(bei)。 

   LTC4095無需外部MOSFET、檢測(ce)(ce)(ce)電(dian)(dian)(dian)阻(zu)或隔離二極(ji)管。在大功(gong)率或高(gao)環境(jing)溫度工作(zuo)時，已獲(huo)專(zhuan)利(li)的(de)(de)熱調(diao)(diao)節(jie)電(dian)(dian)(dian)路通過降(jiang)低(di)充(chong)電(dian)(dian)(dian)電(dian)(dian)(dian)流(liu)以防止該(gai)集成電(dian)(dian)(dian)路的(de)(de)結(jie)溫超過105℃。NTC熱敏電(dian)(dian)(dian)阻(zu)輸入用于(yu)(yu)進行(xing)溫度合(he)格(ge)的(de)(de)充(chong)電(dian)(dian)(dian)。充(chong)電(dian)(dian)(dian)電(dian)(dian)(dian)流(liu)可(ke)采用現售的(de)(de)標準(zhun)電(dian)(dian)(dian)阻(zu)調(diao)(diao)節(jie)。該(gai)器(qi)(qi)件可(ke)于(yu)(yu)高(gao)達(da)5.5V的(de)(de)電(dian)(dian)(dian)源(yuan)工作(zuo)，包括符合(he)USB規范的(de)(de)電(dian)(dian)(dian)源(yuan)和5V交流(liu)適(shi)配器(qi)(qi)。在暫停(ting)模式(shi)，電(dian)(dian)(dian)源(yuan)電(dian)(dian)(dian)流(liu)僅為11uA，電(dian)(dian)(dian)池(chi)漏電(dian)(dian)(dian)流(liu)低(di)于(yu)(yu)2uA。LTC4095還具有4種(zhong)充(chong)電(dian)(dian)(dian)指(zhi)示狀態(tai)，包括閃光、電(dian)(dian)(dian)池(chi)失效檢測(ce)(ce)(ce)、用于(yu)(yu)電(dian)(dian)(dian)池(chi)電(dian)(dian)(dian)量測(ce)(ce)(ce)量的(de)(de)充(chong)電(dian)(dian)(dian)電(dian)(dian)(dian)流(liu)監視器(qi)(qi)輸出、一(yi)個準(zhun)確度為0.6%的(de)(de)4.2V浮動電(dian)(dian)(dian)壓和5%的(de)(de)充(chong)電(dian)(dian)(dian)準(zhun)確度。 

   LTC4095的額定工作溫度范圍為-40℃至85℃。以1,000片為單(dan)位批(pi)量購買(mai)，每片起價為1.15美元(yuan)。 

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(cheng)充電電流范圍為100mA至950mA，準確(que)度為5% 

HPWR和SUSP輸(shu)入面向USB充電應用 

具C/10充電電流(liu)檢測輸出的安(an)全定時(shi)器終(zhong)止 

無(wu)需外部(bu)MOSFET、檢測電(dian)阻或隔離(li)二(er)極管 

熱量反饋(kui)在無過熱風險(xian)的前(qian)提下最大限(xian)度地(di)提高充(chong)電速率 

NTC熱敏電阻輸入用(yong)于溫度合(he)格(ge)的(de)充(chong)電 

具0.6%準確度的預置4.2V充電電壓 

充電電流(liu)監視器輸出用(yong)于(yu)電量檢測 

暫停模式電(dian)池(chi)漏電(dian)流低(di)于(yu)2uA 

暫(zan)停模式電源(yuan)電流< 11uA 

壞電(dian)池(chi)檢測 

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