凌特公司（Linear Technology）推出(chu)集(ji)成了微功率比(bi)較(jiao)器(qi)(qi)的(de)緊湊型(xing)獨(du)立線性單節鋰離子電(dian)(dian)池(chi)充(chong)電(dian)(dian)器(qi)(qi) LTC4062。它具(ju)有保證(zheng)充(chong)電(dian)(dian)安全(quan)性的(de)多種(zhong)先進功能、更(geng)高(gao)的(de)充(chong)電(dian)(dian)終止靈活(huo)性、更(geng)詳細(xi)的(de)狀(zhuang)態報告和更(geng)長的(de)電(dian)(dian)池(chi)壽命等特性。在安全(quan)性方面，LTC4062 具(ju)有可調(diao)節的(de)充(chong)電(dian)(dian)終止計時器(qi)(qi)和防(fang)止電(dian)(dian)池(chi)過充(chong)電(dian)(dian)的(de)精確浮動電(dian)(dian)壓。為消除過熱風(feng)險的(de)同(tong)時以最高(gao)速度充(chong)電(dian)(dian)，獲得專利的(de)熱調(diao)節電(dian)(dian)路可保持 LTC4062 的(de)結溫處于(yu)安全(quan)水平(ping)。此外(wai)，I/O 引腳可在絹流充(chong)電(dian)(dian)、正常充(chong)電(dian)(dian)和充(chong)電(dian)(dian)結束模(mo)式時報告充(chong)電(dian)(dian)狀(zhuang)態。

　　LTC4062 集成了精確的微功率比較(jiao)器。這是(shi)一個非專用(yong)比較(jiao)器并具有通用(yong)輸入和(he)開(kai)漏(lou)輸出，能夠用(yong)于低電池電量檢(jian)測或精確輸入電壓檢(jian)測等(deng)方(fang)面(mian)。

LTC4062 通過(guo)其 Smart StartTM 功能(neng)(neng)去(qu)除(chu)了(le)不必(bi)要的(de)再充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)周(zhou)(zhou)期，從(cong)(cong)而(er)(er)延長(chang)了(le)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)壽(shou)命。因為頻繁的(de)再充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)會降低電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)容量并縮短電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)壽(shou)命，所(suo)以當電(dian)(dian)(dian)(dian)(dian)源第一(yi)次加(jia)到該(gai)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)器上時，如果電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)電(dian)(dian)(dian)(dian)(dian)壓高于(yu) 4.1V，那 Smart Start 功能(neng)(neng)就會阻(zu)止(zhi)新(xin)的(de)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)周(zhou)(zhou)期啟動。該(gai)集(ji)成電(dian)(dian)(dian)(dian)(dian)路(lu)還(huan)具有(you)一(yi)些充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)終止(zhi)方式，這包(bao)括(kuo)用(yong)戶(hu)可(ke)調電(dian)(dian)(dian)(dian)(dian)流(liu)和充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)時間、外部數字控(kong)制或自動 C/10。LTC4062 采用(yong) 3mm x 3mm DFN 封裝(zhuang)(zhuang)，非常適合于(yu)從(cong)(cong)墻(qiang)上適配器或 USB 對 MP3 播放器、數碼相機、PDA 和蜂(feng)窩電(dian)(dian)(dian)(dian)(dian)話中(zhong)的(de)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)。　　LTC4062 能(neng)(neng)以 ±0.35% 的(de)準確度將鋰離(li)子電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)至 4.2V 浮動電(dian)(dian)(dian)(dian)(dian)壓。該(gai)器件無需外部檢測電(dian)(dian)(dian)(dian)(dian)阻(zu)、MOSFET 或隔(ge)離(li)二級管，極大(da)地(di)簡化(hua)了(le)設計。此外，LTC4062 具有(you)軟啟動電(dian)(dian)(dian)(dian)(dian)路(lu)，以最大(da)限度地(di)減小(xiao)開始充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)時的(de)浪涌電(dian)(dian)(dian)(dian)(dian)流(liu)。就通過(guo) USB 的(de)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)而(er)(er)言，USB 控(kong)制器的(de)邏(luo)輯引(yin)(yin)腳可(ke)以按(an)照(zhao)低功率或高功率選擇充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)流(liu)，從(cong)(cong)而(er)(er)消除(chu)對外部分立組(zu)件的(de)依賴。在充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)周(zhou)(zhou)期的(de)任一(yi)時刻，LTC4062 都能(neng)(neng)關斷，從(cong)(cong)而(er)(er)把(ba)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)漏電(dian)(dian)(dian)(dian)(dian)流(liu)限制在低于(yu) 2uA。　　LTC4062 采用(yong) 10 引(yin)(yin)線(xian) 3mm x 3mm DFN 封裝(zhuang)(zhuang)。以 1,000 片(pian)為單位批量購買(mai)，每片(pian)起(qi)價為 1.95 美元。　　性能(neng)(neng)概(gai)要：LTC4062　　? 充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)流(liu)可(ke)編程(cheng)至 1A 的(de)獨立充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)器

　　? 直接(jie)用(yong) USB 端口(kou)對單節(jie)鋰離子(zi)電池充電

　　? 高浮(fu)動(dong)電(dian)壓準確度：±0.35%

　　? 用于電池電量監視或 AC 存在(zai)檢測的微功率比(bi)較器(qi)

　　? 熱調節最(zui)大限(xian)度地(di)提(ti)高充電速度，無(wu)過熱風險

　　? 可編程充電電流檢測/終(zhong)止

　　? 可編(bian)程充電終(zhong)止計時器(qi)

　　? SmartStart 充電算法延長電池壽命(ming)

　　? 智(zhi)能脈沖故障指示功(gong)能

　　? 扁平(ping) 10 引(yin)線 DFN 封(feng)裝（3mm x 3mm x 0.75mm）