凌力爾特公司 (Linear Technology Corporation) 推出面向(xiang)單節鋰離子/聚(ju)合物電(dian)(dian)(dian)(dian)池的(de)緊湊型(xing)(xing)、單片(pian)高(gao)壓電(dian)(dian)(dian)(dian)池充(chong)電(dian)(dian)(dian)(dian)器(qi) LT3650-4.1 和(he)(he) LT3650-4.2。這些(xie)器(qi)件的(de)開關(guan)模(mo)式(shi)架構最大限度地降(jiang)低了(le)(le)(le)功耗(hao)，不(bu)會浪費(fei)電(dian)(dian)(dian)(dian)路板(ban)(ban)空間(jian)。LT3650-4.1/4.2 在 4.75V 至 32V 的(de)電(dian)(dian)(dian)(dian)壓范圍內(nei)工(gong)作(zuo)，具(ju)有 40V 絕對最大額定值，以增加系統裕(yu)度。用戶(hu)可選定時(shi)器(qi)或 C/10 終止(zhi)無需(xu)外部微(wei)控(kong)制(zhi)器(qi)，并(bing)(bing)簡(jian)化了(le)(le)(le)設計(ji)。充(chong)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)流是(shi)可編程的(de)，并(bing)(bing)可動態調整到高(gao)達 2A；電(dian)(dian)(dian)(dian)源電(dian)(dian)(dian)(dian)路集成到芯片(pian)上以節省電(dian)(dian)(dian)(dian)路板(ban)(ban)空間(jian)。LT3650-4.1/4.2 不(bu)需(xu)要外部高(gao)精確度電(dian)(dian)(dian)(dian)阻器(qi)來設置浮(fu)動電(dian)(dian)(dian)(dian)壓，從而(er)進一(yi)步節省了(le)(le)(le)成本和(he)(he)空間(jian)。應用包括工(gong)業手持式(shi)儀表、12V 至 24V 汽車和(he)(he)重型(xing)(xing)設備、臺式(shi)插座充(chong)電(dian)(dian)(dian)(dian)器(qi)和(he)(he)小(xiao)型(xing)(xing)筆記本電(dian)(dian)(dian)(dian)腦或平板(ban)(ban)電(dian)(dian)(dian)(dian)腦。LT3650-4.1 提供 4.1V 電(dian)(dian)(dian)(dian)池浮(fu)動電(dian)(dian)(dian)(dian)壓，允許(xu)高(gao)溫安(an)全容限，而(er) LT3650-4.2 具(ju)有 4.2V 最終充(chong)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)壓，以實現優化的(de)電(dian)(dian)(dian)(dian)池運(yun)行時(shi)間(jian)。

　　LT3650-4.1/4.2 的 1MHz 高工作頻率和電流模(mo)式(shi)架構允許使用小型電感(gan)器和電容器，從而最大限度

地降低了(le)噪聲和濾波需求。最終浮動電(dian)(dian)(dian)(dian)(dian)壓(ya)準(zhun)確(que)度(du)規(gui)格(ge)在 ±0.5%，充(chong)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)流(liu)準(zhun)確(que)度(du)為(wei) ±5%，C/10 檢測(ce)準(zhun)確(que)度(du)為(wei) ±2.5%。一旦充(chong)電(dian)(dian)(dian)(dian)(dian)終止，LT3650-4.1/4.2 就自(zi)動進(jin)入(ru)低電(dian)(dian)(dian)(dian)(dian)流(liu)備用(yong)模(mo)式，這種(zhong)模(mo)式將(jiang)輸入(ru)電(dian)(dian)(dian)(dian)(dian)源電(dian)(dian)(dian)(dian)(dian)流(liu)降至(zhi) 85uA。在停機模(mo)式，輸入(ru)偏置電(dian)(dian)(dian)(dian)(dian)流(liu)被(bei)降至(zhi) 15uA。LT3650-4.1/4.2 在所(suo)有非充(chong)電(dian)(dian)(dian)(dian)(dian)周期(qi)時最大限度(du)地延(yan)長了(le)電(dian)(dian)(dian)(dian)(dian)池壽(shou)命，耗用(yong)低于(yu) 1uA 的(de)電(dian)(dian)(dian)(dian)(dian)池電(dian)(dian)(dian)(dian)(dian)流(liu)。就安全和自(zi)主(zhu)充(chong)電(dian)(dian)(dian)(dian)(dian)控制而(er)言，LT3650-4.1/4.2 具有諸如自(zi)動重啟動和預查驗等功能(neng)、一個熱敏(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)輸入(ru)以(yi)用(yong)于(yu)溫(wen)度(du)合格(ge)的(de)充(chong)電(dian)(dian)(dian)(dian)(dian)、可編程輸入(ru)電(dian)(dian)(dian)(dian)(dian)流(liu)限制、壞(huai)電(dian)(dian)(dian)(dian)(dian)池檢測(ce)和二進(jin)制編碼(ma)狀態輸出引腳。

　　LT3650-4.1 和 LT3650-4.2 采用緊(jin)湊(cou)型、扁平(ping) (0.75mm) 12 引(yin)腳 3mm x 3mm DFN 封裝，可提供 E 級和 I 級版(ban)本(ben)，兩種版(ban)本(ben)都在 -40°C 至(zhi) +85°C 的溫度(du)范圍內工作(zuo)。以 1,000 片為單位批量購買，E 級和 I 級版(ban)本(ben)的價格分別為 2.80 美元(yuan)和 3.22 美元(yuan)。

　　性能概(gai)要：LT3650-4.1 和 LT3650-4.2

　　* 寬輸入(ru)電壓(ya)范圍：4.75V 至 32V (40V 絕(jue)對最大值)

　　* 高達 2A 的可(ke)編程充電(dian)電(dian)流

　　* 用(yong)戶可選終止：C/10 或可編程終止定(ding)時(shi)器

　　* 動態(tai)充電(dian)速率(lv)編(bian)程/軟啟動引腳

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

　　* 可(ke)編(bian)程輸入(ru)電(dian)流限制

　　* 1MHz 開關頻率允許使用小(xiao)型(xing)外部組(zu)件(jian)

　　* ±0.5% 充電(dian)電(dian)壓準確度

　　* ±5% 充電電流準(zhun)確度

　　* ±2.5% C/10 檢測準(zhun)確度

　　* NTC 電(dian)阻(zu)器(qi)(qi)溫度(du)監視器(qi)(qi)

　　* 自動再充電

　　* 自動預查驗

　　* 二進制(zhi)編碼集電(dian)極開路充電(dian)狀態(tai)引腳

　　* 具自動(dong)復位的壞電(dian)池(chi)檢測

　　* 緊(jin)湊(cou)、扁(bian)平(ping) (0.75mm) 3mm x 3mm DFN-12 封(feng)裝