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)(qi)件以(yi)高達(da)950mA的電(dian)(dian)流對單(dan)節鋰離(li)子/聚合物電(dian)(dian)池充電(dian)(dian)，器(qi)(qi)件或其周邊組(zu)件并(bing)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方案僅需要(yao)兩個分立組件（輸入電(dian)容(rong)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封裝可以放(fang)入尺寸(cun)緊湊(cou)的(de)空間中。應用包括(kuo)數碼相機(ji)、便(bian)攜式銷售點和診斷(duan)設備(bei)(bei)、蜂(feng)窩電(dian)話、無線頭戴(dai)式耳機(ji)、媒體(ti)播放(fang)器和配備(bei)(bei)USB接口的(de)手(shou)持式設備(bei)(bei)。 

   LTC4095無(wu)需外部(bu)MOSFET、檢(jian)測電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)或隔離二極管(guan)。在大(da)功(gong)率或高環境溫度(du)(du)工作(zuo)時(shi)，已獲專(zhuan)利的(de)熱調(diao)節電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)通(tong)過降低充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)以防止該(gai)集成電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)的(de)結(jie)溫超過105℃。NTC熱敏電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)輸入用于(yu)進行溫度(du)(du)合格的(de)充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)。充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)可采用現售的(de)標準(zhun)(zhun)電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)調(diao)節。該(gai)器(qi)(qi)件可于(yu)高達5.5V的(de)電(dian)(dian)(dian)(dian)(dian)(dian)源工作(zuo)，包括(kuo)符合USB規(gui)范的(de)電(dian)(dian)(dian)(dian)(dian)(dian)源和(he)5V交流(liu)適(shi)配器(qi)(qi)。在暫停模式，電(dian)(dian)(dian)(dian)(dian)(dian)源電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)僅為(wei)11uA，電(dian)(dian)(dian)(dian)(dian)(dian)池(chi)漏電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)低于(yu)2uA。LTC4095還(huan)具(ju)有4種充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)指示狀態，包括(kuo)閃(shan)光(guang)、電(dian)(dian)(dian)(dian)(dian)(dian)池(chi)失效檢(jian)測、用于(yu)電(dian)(dian)(dian)(dian)(dian)(dian)池(chi)電(dian)(dian)(dian)(dian)(dian)(dian)量測量的(de)充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)監視(shi)器(qi)(qi)輸出、一(yi)個(ge)準(zhun)(zhun)確度(du)(du)為(wei)0.6%的(de)4.2V浮動電(dian)(dian)(dian)(dian)(dian)(dian)壓和(he)5%的(de)充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)準(zhun)(zhun)確度(du)(du)。 

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

LTC4095性能(neng)概要： 

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(fan)圍為100mA至950mA，準確度為5% 

HPWR和SUSP輸(shu)入(ru)面向(xiang)USB充電(dian)應用 

具(ju)C/10充(chong)電電流檢測輸出的安全定時器終止 

無(wu)需外部MOSFET、檢測電阻(zu)或(huo)隔離(li)二(er)極管 

熱量反饋(kui)在無過熱風險的前提(ti)下最大限度地提(ti)高充電速率 

NTC熱敏電(dian)阻輸(shu)入用于溫度合格(ge)的(de)充(chong)電(dian) 

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(yu)電(dian)量檢測 

暫停(ting)模(mo)式電(dian)池漏電(dian)流低于2uA 

暫停模式電源(yuan)電流< 11uA 

壞電(dian)池檢測 

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