凌力(li)爾特公(gong)司(si) (Linear Technology Corporation) 推出面向單節(jie)鋰離子(zi)/聚(ju)合物電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)的(de)(de)緊湊(cou)型(xing)、單片高(gao)壓(ya)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi) LT3650-4.1 和 LT3650-4.2。這些(xie)器(qi)件的(de)(de)開關模式(shi)架構最大限(xian)度地降(jiang)低(di)了功(gong)耗，不(bu)會浪(lang)費電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)板空間(jian)(jian)。LT3650-4.1/4.2 在 4.75V 至(zhi) 32V 的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)范(fan)圍內(nei)工(gong)作，具有(you)(you) 40V 絕(jue)對最大額定值，以增加系統裕度。用(yong)戶可選定時器(qi)或(huo) C/10 終止無需外部微(wei)控制器(qi)，并(bing)簡化了設(she)計(ji)。充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流是可編程的(de)(de)，并(bing)可動(dong)態(tai)調(diao)整到高(gao)達(da) 2A；電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)集成(cheng)到芯片上以節(jie)省電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)板空間(jian)(jian)。LT3650-4.1/4.2 不(bu)需要(yao)外部高(gao)精(jing)確(que)度電(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻器(qi)來設(she)置浮動(dong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)，從而進一步節(jie)省了成(cheng)本和空間(jian)(jian)。應用(yong)包括工(gong)業(ye)手持式(shi)儀(yi)表、12V 至(zhi) 24V 汽車和重型(xing)設(she)備、臺(tai)式(shi)插座(zuo)充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)和小型(xing)筆記本電(dian)(dian)(dian)(dian)(dian)(dian)(dian)腦或(huo)平板電(dian)(dian)(dian)(dian)(dian)(dian)(dian)腦。LT3650-4.1 提(ti)供 4.1V 電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)浮動(dong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)，允許(xu)高(gao)溫安全容限(xian)，而 LT3650-4.2 具有(you)(you) 4.2V 最終充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)，以實現優化的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)運行(xing)時間(jian)(jian)。

　　LT3650-4.1/4.2 的 1MHz 高工作(zuo)頻率和電(dian)流模式(shi)架(jia)構允許(xu)使用(yong)小型電(dian)感(gan)器(qi)和電(dian)容器(qi)，從而最大限(xian)度

地降(jiang)低(di)了(le)噪聲和(he)濾波需求。最(zui)終浮動(dong)電(dian)(dian)(dian)壓準(zhun)確(que)度(du)(du)規(gui)格(ge)在 ±0.5%，充(chong)電(dian)(dian)(dian)電(dian)(dian)(dian)流(liu)(liu)準(zhun)確(que)度(du)(du)為 ±5%，C/10 檢(jian)測(ce)準(zhun)確(que)度(du)(du)為 ±2.5%。一(yi)旦充(chong)電(dian)(dian)(dian)終止，LT3650-4.1/4.2 就自(zi)動(dong)進(jin)入低(di)電(dian)(dian)(dian)流(liu)(liu)備用(yong)(yong)模式，這(zhe)種模式將(jiang)輸(shu)入電(dian)(dian)(dian)源電(dian)(dian)(dian)流(liu)(liu)降(jiang)至(zhi) 85uA。在停機模式，輸(shu)入偏置電(dian)(dian)(dian)流(liu)(liu)被(bei)降(jiang)至(zhi) 15uA。LT3650-4.1/4.2 在所有(you)非(fei)充(chong)電(dian)(dian)(dian)周(zhou)期時最(zui)大限(xian)度(du)(du)地延長(chang)了(le)電(dian)(dian)(dian)池(chi)壽命，耗用(yong)(yong)低(di)于 1uA 的(de)(de)電(dian)(dian)(dian)池(chi)電(dian)(dian)(dian)流(liu)(liu)。就安全和(he)自(zi)主充(chong)電(dian)(dian)(dian)控制(zhi)而(er)言，LT3650-4.1/4.2 具有(you)諸如自(zi)動(dong)重(zhong)啟動(dong)和(he)預查驗等(deng)功(gong)能、一(yi)個熱(re)敏電(dian)(dian)(dian)阻輸(shu)入以(yi)用(yong)(yong)于溫度(du)(du)合(he)格(ge)的(de)(de)充(chong)電(dian)(dian)(dian)、可編程輸(shu)入電(dian)(dian)(dian)流(liu)(liu)限(xian)制(zhi)、壞(huai)電(dian)(dian)(dian)池(chi)檢(jian)測(ce)和(he)二進(jin)制(zhi)編碼狀態輸(shu)出(chu)引腳(jiao)。

　　LT3650-4.1 和 LT3650-4.2 采用緊湊(cou)型、扁平(ping) (0.75mm) 12 引腳 3mm x 3mm DFN 封(feng)裝(zhuang)，可提供 E 級(ji)和 I 級(ji)版本，兩種版本都在 -40°C 至 +85°C 的(de)(de)溫度范圍內(nei)工作。以 1,000 片為(wei)單位批(pi)量(liang)購買，E 級(ji)和 I 級(ji)版本的(de)(de)價(jia)格分別(bie)為(wei) 2.80 美(mei)元和 3.22 美(mei)元。

　　性能概要：LT3650-4.1 和 LT3650-4.2

　　* 寬(kuan)輸入電壓范(fan)圍：4.75V 至 32V (40V 絕對最大(da)值)

　　* 高達 2A 的(de)可(ke)編程充電電流

　　* 用(yong)戶(hu)可(ke)選終止(zhi)(zhi)：C/10 或可(ke)編(bian)程終止(zhi)(zhi)定時(shi)器

　　* 動態充電速(su)率(lv)編(bian)程(cheng)/軟啟動引腳

　　* 電(dian)池浮動電(dian)壓：4.1V (LT3650-4.1)、4.2V (LT3650-4.2)

　　* 可編(bian)程(cheng)輸入電流限(xian)制

　　* 1MHz 開關頻率允許使用小型外(wai)部組件

　　* ±0.5% 充電(dian)電(dian)壓準確度

　　* ±5% 充電電流準確度(du)

　　* ±2.5% C/10 檢測(ce)準確度

　　* NTC 電阻(zu)器(qi)溫度監視器(qi)

　　* 自動再充電

　　* 自動預查驗

　　* 二(er)進制編碼(ma)集電極開路(lu)充電狀(zhuang)態引(yin)腳(jiao)

　　* 具自動(dong)復位(wei)的壞電池(chi)檢測

　　* 緊湊、扁平(ping) (0.75mm) 3mm x 3mm DFN-12 封裝