凌特(te)公司（Linear Technology）推(tui)出集成了(le)微功率比較器的(de)(de)緊湊型獨立(li)線性(xing)(xing)(xing)(xing)單(dan)節(jie)鋰離子(zi)電池充(chong)(chong)(chong)(chong)電器 LTC4062。它(ta)具有保(bao)證充(chong)(chong)(chong)(chong)電安全(quan)(quan)性(xing)(xing)(xing)(xing)的(de)(de)多種先進功能、更高(gao)的(de)(de)充(chong)(chong)(chong)(chong)電終(zhong)止(zhi)靈活性(xing)(xing)(xing)(xing)、更詳(xiang)細的(de)(de)狀態報告和(he)更長的(de)(de)電池壽(shou)命等特(te)性(xing)(xing)(xing)(xing)。在(zai)(zai)安全(quan)(quan)性(xing)(xing)(xing)(xing)方面，LTC4062 具有可調節(jie)的(de)(de)充(chong)(chong)(chong)(chong)電終(zhong)止(zhi)計時器和(he)防止(zhi)電池過(guo)(guo)充(chong)(chong)(chong)(chong)電的(de)(de)精確(que)浮動電壓。為消(xiao)除過(guo)(guo)熱風險的(de)(de)同時以最高(gao)速度充(chong)(chong)(chong)(chong)電，獲(huo)得專利的(de)(de)熱調節(jie)電路可保(bao)持(chi) LTC4062 的(de)(de)結溫處于安全(quan)(quan)水平。此外，I/O 引腳可在(zai)(zai)絹流充(chong)(chong)(chong)(chong)電、正常充(chong)(chong)(chong)(chong)電和(he)充(chong)(chong)(chong)(chong)電結束模(mo)式時報告充(chong)(chong)(chong)(chong)電狀態。

　　LTC4062 集成了精確(que)的微(wei)功率比較器。這是一個非專用比較器并具(ju)有通用輸入(ru)(ru)和開漏(lou)輸出，能夠用于低電(dian)池電(dian)量檢測或精確(que)輸入(ru)(ru)電(dian)壓檢測等方(fang)面。

LTC4062 通過其 Smart StartTM 功(gong)能去除(chu)了(le)不必要的再(zai)充電(dian)(dian)(dian)(dian)周期，從(cong)(cong)(cong)而(er)延長了(le)電(dian)(dian)(dian)(dian)池(chi)(chi)壽命。因為頻繁的再(zai)充電(dian)(dian)(dian)(dian)會降低電(dian)(dian)(dian)(dian)池(chi)(chi)容量并縮短(duan)電(dian)(dian)(dian)(dian)池(chi)(chi)壽命，所(suo)以(yi)當電(dian)(dian)(dian)(dian)源第一(yi)次加(jia)到該充電(dian)(dian)(dian)(dian)器(qi)(qi)上時，如果電(dian)(dian)(dian)(dian)池(chi)(chi)電(dian)(dian)(dian)(dian)壓(ya)高(gao)于 4.1V，那(nei) Smart Start 功(gong)能就會阻止新的充電(dian)(dian)(dian)(dian)周期啟動。該集成電(dian)(dian)(dian)(dian)路還具有一(yi)些充電(dian)(dian)(dian)(dian)終(zhong)止方式，這包括用戶可(ke)調電(dian)(dian)(dian)(dian)流(liu)和(he)充電(dian)(dian)(dian)(dian)時間、外(wai)部數字控制(zhi)或(huo)自動 C/10。LTC4062 采(cai)用 3mm x 3mm DFN 封裝(zhuang)，非常適(shi)合于從(cong)(cong)(cong)墻上適(shi)配器(qi)(qi)或(huo) USB 對 MP3 播放(fang)器(qi)(qi)、數碼相(xiang)機、PDA 和(he)蜂窩電(dian)(dian)(dian)(dian)話中的電(dian)(dian)(dian)(dian)池(chi)(chi)充電(dian)(dian)(dian)(dian)。　　LTC4062 能以(yi) ±0.35% 的準(zhun)確(que)度將鋰離子電(dian)(dian)(dian)(dian)池(chi)(chi)充電(dian)(dian)(dian)(dian)至(zhi) 4.2V 浮動電(dian)(dian)(dian)(dian)壓(ya)。該器(qi)(qi)件無(wu)需外(wai)部檢(jian)測電(dian)(dian)(dian)(dian)阻、MOSFET 或(huo)隔離二級(ji)管，極大地(di)簡(jian)化了(le)設計(ji)。此外(wai)，LTC4062 具有軟啟動電(dian)(dian)(dian)(dian)路，以(yi)最大限度地(di)減小開始充電(dian)(dian)(dian)(dian)時的浪涌(yong)電(dian)(dian)(dian)(dian)流(liu)。就通過 USB 的充電(dian)(dian)(dian)(dian)而(er)言，USB 控制(zhi)器(qi)(qi)的邏(luo)輯引(yin)腳可(ke)以(yi)按照低功(gong)率或(huo)高(gao)功(gong)率選擇充電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)流(liu)，從(cong)(cong)(cong)而(er)消除(chu)對外(wai)部分立(li)組(zu)件的依賴。在充電(dian)(dian)(dian)(dian)周期的任一(yi)時刻，LTC4062 都能關斷(duan)，從(cong)(cong)(cong)而(er)把電(dian)(dian)(dian)(dian)池(chi)(chi)漏電(dian)(dian)(dian)(dian)流(liu)限制(zhi)在低于 2uA。　　LTC4062 采(cai)用 10 引(yin)線 3mm x 3mm DFN 封裝(zhuang)。以(yi) 1,000 片為單(dan)位批量購買，每(mei)片起價為 1.95 美(mei)元。　　性(xing)能概要：LTC4062　　? 充電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)流(liu)可(ke)編程至(zhi) 1A 的獨立(li)充電(dian)(dian)(dian)(dian)器(qi)(qi)

　　? 直接用(yong) USB 端口對單節(jie)鋰離子電(dian)池充電(dian)

　　? 高浮動電壓準確度(du)：±0.35%

　　? 用于電池電量監視或 AC 存(cun)在(zai)檢測(ce)的微(wei)功率比較器

　　? 熱(re)調節(jie)最大限度(du)地提高(gao)充電速(su)度(du)，無過熱(re)風(feng)險(xian)

　　? 可(ke)編程充電電流檢測/終止

　　? 可編程充電終止計時器

　　? SmartStart 充(chong)電(dian)算法延長(chang)電(dian)池壽命

　　? 智能脈沖(chong)故障(zhang)指示功(gong)能

　　? 扁平 10 引線 DFN 封裝（3mm x 3mm x 0.75mm）