凌力爾特(te)公司 (Linear Technology Corporation) 推(tui)出面向單節(jie)鋰離子(zi)/聚合物電(dian)(dian)(dian)池的(de)(de)緊湊(cou)型(xing)(xing)、單片(pian)(pian)高(gao)壓(ya)電(dian)(dian)(dian)池充(chong)電(dian)(dian)(dian)器 LT3650-4.1 和(he) LT3650-4.2。這些器件的(de)(de)開(kai)關模式(shi)架構最(zui)大(da)限(xian)度地(di)降(jiang)低(di)了功(gong)耗，不(bu)會浪(lang)費電(dian)(dian)(dian)路板空間。LT3650-4.1/4.2 在 4.75V 至(zhi) 32V 的(de)(de)電(dian)(dian)(dian)壓(ya)范圍內工作(zuo)，具(ju)有 40V 絕對最(zui)大(da)額定值，以增加系(xi)統裕度。用戶可(ke)(ke)選定時器或 C/10 終(zhong)(zhong)止無需外部微控制器，并(bing)簡化(hua)了設計。充(chong)電(dian)(dian)(dian)電(dian)(dian)(dian)流是可(ke)(ke)編程的(de)(de)，并(bing)可(ke)(ke)動(dong)態(tai)調(diao)整到(dao)高(gao)達 2A；電(dian)(dian)(dian)源電(dian)(dian)(dian)路集成到(dao)芯片(pian)(pian)上以節(jie)省(sheng)電(dian)(dian)(dian)路板空間。LT3650-4.1/4.2 不(bu)需要(yao)外部高(gao)精確度電(dian)(dian)(dian)阻器來(lai)設置浮(fu)動(dong)電(dian)(dian)(dian)壓(ya)，從而進一步節(jie)省(sheng)了成本和(he)空間。應用包括工業手持式(shi)儀表、12V 至(zhi) 24V 汽(qi)車(che)和(he)重型(xing)(xing)設備、臺(tai)式(shi)插座充(chong)電(dian)(dian)(dian)器和(he)小型(xing)(xing)筆記本電(dian)(dian)(dian)腦或平板電(dian)(dian)(dian)腦。LT3650-4.1 提供 4.1V 電(dian)(dian)(dian)池浮(fu)動(dong)電(dian)(dian)(dian)壓(ya)，允許高(gao)溫安全(quan)容限(xian)，而 LT3650-4.2 具(ju)有 4.2V 最(zui)終(zhong)(zhong)充(chong)電(dian)(dian)(dian)電(dian)(dian)(dian)壓(ya)，以實(shi)現優化(hua)的(de)(de)電(dian)(dian)(dian)池運行(xing)時間。

　　LT3650-4.1/4.2 的 1MHz 高工作(zuo)頻(pin)率和電(dian)流模式架(jia)構(gou)允(yun)許使用小型(xing)電(dian)感器和電(dian)容器，從而最大限度(du)

地降(jiang)低(di)了(le)噪聲和(he)濾波需求。最(zui)終浮動電(dian)(dian)(dian)(dian)壓準確(que)度(du)規格(ge)在(zai) ±0.5%，充(chong)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)流(liu)準確(que)度(du)為 ±5%，C/10 檢測準確(que)度(du)為 ±2.5%。一(yi)旦(dan)充(chong)電(dian)(dian)(dian)(dian)終止，LT3650-4.1/4.2 就(jiu)自動進入(ru)(ru)低(di)電(dian)(dian)(dian)(dian)流(liu)備用模式，這種模式將輸入(ru)(ru)電(dian)(dian)(dian)(dian)源電(dian)(dian)(dian)(dian)流(liu)降(jiang)至 85uA。在(zai)停(ting)機(ji)模式，輸入(ru)(ru)偏置(zhi)電(dian)(dian)(dian)(dian)流(liu)被降(jiang)至 15uA。LT3650-4.1/4.2 在(zai)所(suo)有非(fei)充(chong)電(dian)(dian)(dian)(dian)周(zhou)期時最(zui)大限(xian)度(du)地延長了(le)電(dian)(dian)(dian)(dian)池(chi)壽命，耗用低(di)于(yu)(yu) 1uA 的(de)電(dian)(dian)(dian)(dian)池(chi)電(dian)(dian)(dian)(dian)流(liu)。就(jiu)安全和(he)自主充(chong)電(dian)(dian)(dian)(dian)控(kong)制(zhi)而言，LT3650-4.1/4.2 具有諸如自動重啟(qi)動和(he)預查驗(yan)等功能、一(yi)個(ge)熱敏電(dian)(dian)(dian)(dian)阻輸入(ru)(ru)以用于(yu)(yu)溫度(du)合格(ge)的(de)充(chong)電(dian)(dian)(dian)(dian)、可(ke)編(bian)程輸入(ru)(ru)電(dian)(dian)(dian)(dian)流(liu)限(xian)制(zhi)、壞電(dian)(dian)(dian)(dian)池(chi)檢測和(he)二進制(zhi)編(bian)碼狀(zhuang)態(tai)輸出引(yin)腳。

　　LT3650-4.1 和(he) LT3650-4.2 采用緊湊型、扁(bian)平 (0.75mm) 12 引(yin)腳(jiao) 3mm x 3mm DFN 封裝(zhuang)，可提供 E 級(ji)和(he) I 級(ji)版(ban)(ban)本(ben)，兩(liang)種版(ban)(ban)本(ben)都在 -40°C 至(zhi) +85°C 的溫度范圍內工作。以 1,000 片為(wei)單位批量購(gou)買(mai)，E 級(ji)和(he) I 級(ji)版(ban)(ban)本(ben)的價(jia)格分別為(wei) 2.80 美(mei)元和(he) 3.22 美(mei)元。

　　性能(neng)概要：LT3650-4.1 和 LT3650-4.2

　　* 寬輸入電壓范圍：4.75V 至 32V (40V 絕對最大值(zhi))

　　* 高達 2A 的可編程(cheng)充電電流

　　* 用戶可(ke)選終止(zhi)：C/10 或(huo)可(ke)編程終止(zhi)定時器(qi)

　　* 動態充(chong)電速率(lv)編程/軟啟動引腳

　　* 電池浮動電壓：4.1V (LT3650-4.1)、4.2V (LT3650-4.2)

　　* 可編程輸入電流限(xian)制

　　* 1MHz 開關頻率(lv)允許使用(yong)小型外部組件

　　* ±0.5% 充電電壓準確度(du)

　　* ±5% 充電電流準確度

　　* ±2.5% C/10 檢測(ce)準確度

　　* NTC 電阻器溫(wen)度監視器

　　* 自動再充電

　　* 自動預查驗

　　* 二進制(zhi)編碼集電極(ji)開路充電狀態引腳

　　* 具(ju)自動復(fu)位(wei)的壞電池檢測

　　* 緊(jin)湊、扁平 (0.75mm) 3mm x 3mm DFN-12 封裝