凌力爾特公(gong)司 (Linear Technology Corporation) 推出面向單節鋰離子/聚合物電(dian)(dian)(dian)池(chi)(chi)(chi)的(de)緊(jin)湊型(xing)、單片高壓(ya)電(dian)(dian)(dian)池(chi)(chi)(chi)充(chong)(chong)電(dian)(dian)(dian)器(qi)(qi) LT3650-4.1 和(he) LT3650-4.2。這(zhe)些器(qi)(qi)件的(de)開關(guan)模式(shi)架構最大(da)限(xian)度(du)地(di)降低了功耗(hao)，不(bu)會浪費(fei)電(dian)(dian)(dian)路板(ban)空(kong)(kong)間(jian)。LT3650-4.1/4.2 在 4.75V 至(zhi) 32V 的(de)電(dian)(dian)(dian)壓(ya)范圍(wei)內(nei)工作，具有(you) 40V 絕對(dui)最大(da)額定(ding)值，以(yi)增加系統裕度(du)。用(yong)戶可選定(ding)時器(qi)(qi)或(huo) C/10 終止(zhi)無需外(wai)部微控制(zhi)器(qi)(qi)，并簡化了設(she)計。充(chong)(chong)電(dian)(dian)(dian)電(dian)(dian)(dian)流是(shi)可編程(cheng)的(de)，并可動(dong)態調(diao)整到高達 2A；電(dian)(dian)(dian)源電(dian)(dian)(dian)路集成到芯片上以(yi)節省電(dian)(dian)(dian)路板(ban)空(kong)(kong)間(jian)。LT3650-4.1/4.2 不(bu)需要(yao)外(wai)部高精確度(du)電(dian)(dian)(dian)阻(zu)器(qi)(qi)來設(she)置(zhi)浮(fu)動(dong)電(dian)(dian)(dian)壓(ya)，從而(er)進一步節省了成本(ben)和(he)空(kong)(kong)間(jian)。應(ying)用(yong)包括工業手持式(shi)儀表、12V 至(zhi) 24V 汽車和(he)重型(xing)設(she)備、臺式(shi)插座(zuo)充(chong)(chong)電(dian)(dian)(dian)器(qi)(qi)和(he)小型(xing)筆記本(ben)電(dian)(dian)(dian)腦(nao)或(huo)平板(ban)電(dian)(dian)(dian)腦(nao)。LT3650-4.1 提供 4.1V 電(dian)(dian)(dian)池(chi)(chi)(chi)浮(fu)動(dong)電(dian)(dian)(dian)壓(ya)，允許高溫安(an)全(quan)容(rong)限(xian)，而(er) LT3650-4.2 具有(you) 4.2V 最終充(chong)(chong)電(dian)(dian)(dian)電(dian)(dian)(dian)壓(ya)，以(yi)實現優化的(de)電(dian)(dian)(dian)池(chi)(chi)(chi)運行時間(jian)。

　　LT3650-4.1/4.2 的 1MHz 高工作頻率和電流模式架構允(yun)許使用小(xiao)型電感器和電容(rong)器，從而(er)最大限度(du)

地降低(di)了噪聲和濾波需求(qiu)。最終浮動(dong)(dong)電(dian)(dian)(dian)(dian)(dian)壓準確(que)度(du)(du)規格在 ±0.5%，充(chong)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)流(liu)準確(que)度(du)(du)為 ±5%，C/10 檢測準確(que)度(du)(du)為 ±2.5%。一(yi)旦充(chong)電(dian)(dian)(dian)(dian)(dian)終止，LT3650-4.1/4.2 就自動(dong)(dong)進(jin)入(ru)(ru)低(di)電(dian)(dian)(dian)(dian)(dian)流(liu)備用(yong)(yong)模式，這種模式將輸(shu)入(ru)(ru)電(dian)(dian)(dian)(dian)(dian)源電(dian)(dian)(dian)(dian)(dian)流(liu)降至(zhi) 85uA。在停(ting)機模式，輸(shu)入(ru)(ru)偏置電(dian)(dian)(dian)(dian)(dian)流(liu)被降至(zhi) 15uA。LT3650-4.1/4.2 在所(suo)有非(fei)充(chong)電(dian)(dian)(dian)(dian)(dian)周期時(shi)最大限(xian)度(du)(du)地延長了電(dian)(dian)(dian)(dian)(dian)池壽命，耗(hao)用(yong)(yong)低(di)于(yu)(yu) 1uA 的電(dian)(dian)(dian)(dian)(dian)池電(dian)(dian)(dian)(dian)(dian)流(liu)。就安全和自主(zhu)充(chong)電(dian)(dian)(dian)(dian)(dian)控制(zhi)而言，LT3650-4.1/4.2 具有諸如自動(dong)(dong)重啟動(dong)(dong)和預查驗等功能、一(yi)個熱敏(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)輸(shu)入(ru)(ru)以用(yong)(yong)于(yu)(yu)溫度(du)(du)合(he)格的充(chong)電(dian)(dian)(dian)(dian)(dian)、可編程(cheng)輸(shu)入(ru)(ru)電(dian)(dian)(dian)(dian)(dian)流(liu)限(xian)制(zhi)、壞電(dian)(dian)(dian)(dian)(dian)池檢測和二進(jin)制(zhi)編碼(ma)狀態輸(shu)出引腳(jiao)。

　　LT3650-4.1 和(he)(he) LT3650-4.2 采用緊湊型、扁平(ping) (0.75mm) 12 引(yin)腳 3mm x 3mm DFN 封裝，可(ke)提供 E 級(ji)和(he)(he) I 級(ji)版(ban)本(ben)，兩種版(ban)本(ben)都(dou)在 -40°C 至 +85°C 的(de)溫度范圍內工作。以 1,000 片為單位批(pi)量購買，E 級(ji)和(he)(he) I 級(ji)版(ban)本(ben)的(de)價格分(fen)別為 2.80 美元和(he)(he) 3.22 美元。

　　性能概(gai)要：LT3650-4.1 和 LT3650-4.2

　　* 寬輸(shu)入電壓范圍(wei)：4.75V 至 32V (40V 絕對最(zui)大值)

　　* 高達 2A 的可編程充電電流

　　* 用(yong)戶可選終(zhong)止(zhi)：C/10 或可編(bian)程終(zhong)止(zhi)定時器

　　* 動態充電(dian)速率編程/軟啟動引腳

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

　　* 可編程輸入電流限制(zhi)

　　* 1MHz 開關頻率(lv)允許使用小(xiao)型外部組件

　　* ±0.5% 充電電壓準確度

　　* ±5% 充電電流(liu)準確度

　　* ±2.5% C/10 檢測準確度

　　* NTC 電阻器溫(wen)度監視器

　　* 自動再充電

　　* 自動預查驗

　　* 二進制編碼集電極開(kai)路充電狀(zhuang)態引腳

　　* 具(ju)自(zi)動復(fu)位的壞(huai)電池檢測

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