凌力爾(er)特公司 (Linear Technology Corporation) 推出(chu)面向單(dan)節鋰離子/聚合物電(dian)(dian)(dian)(dian)(dian)池(chi)的(de)(de)緊(jin)湊型(xing)、單(dan)片高(gao)(gao)壓電(dian)(dian)(dian)(dian)(dian)池(chi)充電(dian)(dian)(dian)(dian)(dian)器(qi) LT3650-4.1 和(he) LT3650-4.2。這些器(qi)件的(de)(de)開關模式(shi)架構最(zui)大限度(du)地降低了(le)功耗，不會浪費電(dian)(dian)(dian)(dian)(dian)路(lu)板空(kong)間(jian)(jian)。LT3650-4.1/4.2 在 4.75V 至 32V 的(de)(de)電(dian)(dian)(dian)(dian)(dian)壓范圍內工(gong)作，具(ju)有(you) 40V 絕(jue)對最(zui)大額定值，以增加系統(tong)裕度(du)。用(yong)戶可選定時(shi)器(qi)或 C/10 終止無需外部(bu)微控(kong)制器(qi)，并簡化了(le)設(she)(she)計。充電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)流是可編程的(de)(de)，并可動態調整(zheng)到高(gao)(gao)達 2A；電(dian)(dian)(dian)(dian)(dian)源電(dian)(dian)(dian)(dian)(dian)路(lu)集成到芯片上(shang)以節省電(dian)(dian)(dian)(dian)(dian)路(lu)板空(kong)間(jian)(jian)。LT3650-4.1/4.2 不需要(yao)外部(bu)高(gao)(gao)精確度(du)電(dian)(dian)(dian)(dian)(dian)阻(zu)器(qi)來設(she)(she)置浮(fu)動電(dian)(dian)(dian)(dian)(dian)壓，從(cong)而(er)進一步節省了(le)成本和(he)空(kong)間(jian)(jian)。應用(yong)包括工(gong)業手持(chi)式(shi)儀表(biao)、12V 至 24V 汽車和(he)重型(xing)設(she)(she)備、臺式(shi)插座(zuo)充電(dian)(dian)(dian)(dian)(dian)器(qi)和(he)小型(xing)筆記本電(dian)(dian)(dian)(dian)(dian)腦(nao)或平(ping)板電(dian)(dian)(dian)(dian)(dian)腦(nao)。LT3650-4.1 提供 4.1V 電(dian)(dian)(dian)(dian)(dian)池(chi)浮(fu)動電(dian)(dian)(dian)(dian)(dian)壓，允許高(gao)(gao)溫安全容限，而(er) LT3650-4.2 具(ju)有(you) 4.2V 最(zui)終充電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)壓，以實現優化的(de)(de)電(dian)(dian)(dian)(dian)(dian)池(chi)運行(xing)時(shi)間(jian)(jian)。

　　LT3650-4.1/4.2 的 1MHz 高工(gong)作頻率和(he)電流模式架構允(yun)許使用(yong)小型電感器(qi)和(he)電容器(qi)，從而(er)最大限(xian)度

地降低(di)(di)了噪(zao)聲和(he)濾(lv)波需求。最終(zhong)浮動電(dian)(dian)(dian)壓準確度(du)規格在 ±0.5%，充(chong)電(dian)(dian)(dian)電(dian)(dian)(dian)流(liu)(liu)(liu)準確度(du)為 ±5%，C/10 檢測(ce)(ce)準確度(du)為 ±2.5%。一旦充(chong)電(dian)(dian)(dian)終(zhong)止，LT3650-4.1/4.2 就自動進入(ru)低(di)(di)電(dian)(dian)(dian)流(liu)(liu)(liu)備用(yong)(yong)模(mo)(mo)式，這種模(mo)(mo)式將輸(shu)(shu)(shu)入(ru)電(dian)(dian)(dian)源(yuan)電(dian)(dian)(dian)流(liu)(liu)(liu)降至(zhi) 85uA。在停機模(mo)(mo)式，輸(shu)(shu)(shu)入(ru)偏置電(dian)(dian)(dian)流(liu)(liu)(liu)被(bei)降至(zhi) 15uA。LT3650-4.1/4.2 在所(suo)有非充(chong)電(dian)(dian)(dian)周期時最大(da)限度(du)地延長了電(dian)(dian)(dian)池(chi)(chi)壽命，耗用(yong)(yong)低(di)(di)于(yu) 1uA 的電(dian)(dian)(dian)池(chi)(chi)電(dian)(dian)(dian)流(liu)(liu)(liu)。就安全(quan)和(he)自主充(chong)電(dian)(dian)(dian)控(kong)制而言，LT3650-4.1/4.2 具有諸(zhu)如自動重啟動和(he)預(yu)查驗等功(gong)能、一個熱(re)敏電(dian)(dian)(dian)阻輸(shu)(shu)(shu)入(ru)以用(yong)(yong)于(yu)溫度(du)合格的充(chong)電(dian)(dian)(dian)、可(ke)編程(cheng)輸(shu)(shu)(shu)入(ru)電(dian)(dian)(dian)流(liu)(liu)(liu)限制、壞(huai)電(dian)(dian)(dian)池(chi)(chi)檢測(ce)(ce)和(he)二進制編碼狀態輸(shu)(shu)(shu)出引腳。

　　LT3650-4.1 和 LT3650-4.2 采用緊湊型、扁(bian)平 (0.75mm) 12 引腳 3mm x 3mm DFN 封裝，可提供(gong) E 級(ji)(ji)和 I 級(ji)(ji)版(ban)本(ben)，兩(liang)種版(ban)本(ben)都(dou)在 -40°C 至 +85°C 的溫度范圍內工(gong)作(zuo)。以 1,000 片為(wei)單位批量(liang)購買，E 級(ji)(ji)和 I 級(ji)(ji)版(ban)本(ben)的價格分別為(wei) 2.80 美元和 3.22 美元。

　　性能概要：LT3650-4.1 和 LT3650-4.2

　　* 寬輸(shu)入電(dian)壓范(fan)圍：4.75V 至 32V (40V 絕對(dui)最大值)

　　* 高達 2A 的可(ke)編程充電電流

　　* 用戶(hu)可選終止：C/10 或可編程終止定時器

　　* 動態充(chong)電速率編程/軟(ruan)啟動引腳(jiao)

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

　　* 可編程輸入電流限制(zhi)

　　* 1MHz 開(kai)關(guan)頻率允許(xu)使用小型(xing)外部組件

　　* ±0.5% 充電(dian)電(dian)壓準確度

　　* ±5% 充電電流準確(que)度

　　* ±2.5% C/10 檢測(ce)準確度(du)

　　* NTC 電阻器(qi)溫(wen)度監(jian)視器(qi)

　　* 自動再充電

　　* 自動預查驗

　　* 二(er)進制編碼集電極開路充電狀(zhuang)態引腳

　　* 具自動復(fu)位的壞電池檢測

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