凌力爾特公(gong)司 (Linear Technology Corporation) 推出面(mian)向單節鋰離子/聚合物電(dian)(dian)(dian)池的(de)(de)緊(jin)湊(cou)型(xing)、單片高壓電(dian)(dian)(dian)池充電(dian)(dian)(dian)器(qi)(qi)(qi) LT3650-4.1 和 LT3650-4.2。這些器(qi)(qi)(qi)件(jian)的(de)(de)開關模式架(jia)構最(zui)大(da)限度(du)(du)地降低了(le)功耗，不會浪(lang)費(fei)電(dian)(dian)(dian)路(lu)板(ban)(ban)空間。LT3650-4.1/4.2 在 4.75V 至 32V 的(de)(de)電(dian)(dian)(dian)壓范圍內工作(zuo)，具有(you) 40V 絕對(dui)最(zui)大(da)額定(ding)值，以(yi)增加系統裕(yu)度(du)(du)。用戶可選(xuan)定(ding)時器(qi)(qi)(qi)或 C/10 終止無(wu)需(xu)外部微控制(zhi)器(qi)(qi)(qi)，并簡化(hua)了(le)設(she)計。充電(dian)(dian)(dian)電(dian)(dian)(dian)流是可編(bian)程的(de)(de)，并可動態調整(zheng)到高達(da) 2A；電(dian)(dian)(dian)源電(dian)(dian)(dian)路(lu)集成到芯片上以(yi)節省電(dian)(dian)(dian)路(lu)板(ban)(ban)空間。LT3650-4.1/4.2 不需(xu)要外部高精確度(du)(du)電(dian)(dian)(dian)阻器(qi)(qi)(qi)來設(she)置浮(fu)動電(dian)(dian)(dian)壓，從而(er)進一步節省了(le)成本和空間。應用包括工業(ye)手(shou)持式儀表、12V 至 24V 汽(qi)車(che)和重型(xing)設(she)備、臺式插座充電(dian)(dian)(dian)器(qi)(qi)(qi)和小型(xing)筆(bi)記本電(dian)(dian)(dian)腦(nao)或平(ping)板(ban)(ban)電(dian)(dian)(dian)腦(nao)。LT3650-4.1 提供 4.1V 電(dian)(dian)(dian)池浮(fu)動電(dian)(dian)(dian)壓，允許高溫安全(quan)容限，而(er) LT3650-4.2 具有(you) 4.2V 最(zui)終充電(dian)(dian)(dian)電(dian)(dian)(dian)壓，以(yi)實現(xian)優化(hua)的(de)(de)電(dian)(dian)(dian)池運行(xing)時間。

　　LT3650-4.1/4.2 的 1MHz 高(gao)工作頻率和電(dian)流模式(shi)架構允許使用小型電(dian)感器和電(dian)容器，從而最大(da)限(xian)度(du)

地降低(di)了噪聲(sheng)和濾波需求。最(zui)終浮(fu)動電(dian)(dian)(dian)(dian)壓準(zhun)確度(du)規格在 ±0.5%，充(chong)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)流準(zhun)確度(du)為 ±5%，C/10 檢(jian)測準(zhun)確度(du)為 ±2.5%。一旦(dan)充(chong)電(dian)(dian)(dian)(dian)終止，LT3650-4.1/4.2 就自(zi)動進(jin)入(ru)(ru)低(di)電(dian)(dian)(dian)(dian)流備用模式(shi)(shi)，這種(zhong)模式(shi)(shi)將輸(shu)入(ru)(ru)電(dian)(dian)(dian)(dian)源電(dian)(dian)(dian)(dian)流降至(zhi) 85uA。在停機模式(shi)(shi)，輸(shu)入(ru)(ru)偏置電(dian)(dian)(dian)(dian)流被降至(zhi) 15uA。LT3650-4.1/4.2 在所(suo)有非充(chong)電(dian)(dian)(dian)(dian)周期(qi)時最(zui)大限度(du)地延長了電(dian)(dian)(dian)(dian)池壽命，耗用低(di)于 1uA 的(de)電(dian)(dian)(dian)(dian)池電(dian)(dian)(dian)(dian)流。就安全和自(zi)主充(chong)電(dian)(dian)(dian)(dian)控制而言，LT3650-4.1/4.2 具(ju)有諸如自(zi)動重(zhong)啟動和預查驗等功能、一個熱敏電(dian)(dian)(dian)(dian)阻輸(shu)入(ru)(ru)以用于溫度(du)合格的(de)充(chong)電(dian)(dian)(dian)(dian)、可編程(cheng)輸(shu)入(ru)(ru)電(dian)(dian)(dian)(dian)流限制、壞電(dian)(dian)(dian)(dian)池檢(jian)測和二進(jin)制編碼狀態輸(shu)出引(yin)腳。

　　LT3650-4.1 和(he) LT3650-4.2 采用緊湊型、扁平 (0.75mm) 12 引腳 3mm x 3mm DFN 封裝，可提供 E 級(ji)和(he) I 級(ji)版本(ben)，兩種版本(ben)都在 -40°C 至 +85°C 的(de)溫度范圍內工作。以 1,000 片(pian)為單位批量購買，E 級(ji)和(he) I 級(ji)版本(ben)的(de)價格分別為 2.80 美(mei)元(yuan)和(he) 3.22 美(mei)元(yuan)。

　　性能概要：LT3650-4.1 和 LT3650-4.2

　　* 寬(kuan)輸入(ru)電壓(ya)范圍：4.75V 至 32V (40V 絕對最(zui)大值(zhi))

　　* 高達 2A 的可編程充(chong)電電流

　　* 用戶可選終止(zhi)：C/10 或可編程終止(zhi)定時(shi)器

　　* 動態充電(dian)速率編程/軟啟動引腳

　　* 電池(chi)浮(fu)動電壓：4.1V (LT3650-4.1)、4.2V (LT3650-4.2)

　　* 可(ke)編程(cheng)輸入(ru)電流限制(zhi)

　　* 1MHz 開關頻率允許使用小型外部組件(jian)

　　* ±0.5% 充(chong)電電壓(ya)準確度

　　* ±5% 充電(dian)電(dian)流準確度

　　* ±2.5% C/10 檢測(ce)準確度

　　* NTC 電阻(zu)器(qi)溫度監(jian)視器(qi)

　　* 自動再充電

　　* 自動預查驗

　　* 二進制編(bian)碼集電(dian)極開路充電(dian)狀態引腳

　　* 具自動復(fu)位的壞電池檢(jian)測

　　* 緊(jin)湊、扁平 (0.75mm) 3mm x 3mm DFN-12 封(feng)裝