凌力(li)爾特公司 (Linear Technology Corporation) 推(tui)出面向單(dan)節(jie)鋰(li)離子/聚合物(wu)電(dian)(dian)(dian)池(chi)的(de)緊湊(cou)型、單(dan)片高壓電(dian)(dian)(dian)池(chi)充電(dian)(dian)(dian)器 LT3650-4.1 和(he)(he) LT3650-4.2。這些(xie)器件的(de)開關模(mo)式(shi)架構最(zui)(zui)大限(xian)度(du)地降低了功(gong)耗(hao)，不會(hui)浪費電(dian)(dian)(dian)路(lu)板空間。LT3650-4.1/4.2 在 4.75V 至 32V 的(de)電(dian)(dian)(dian)壓范圍(wei)內工(gong)作，具有 40V 絕對最(zui)(zui)大額定(ding)值，以(yi)(yi)增加系統裕(yu)度(du)。用(yong)戶可選定(ding)時(shi)器或 C/10 終(zhong)(zhong)止無需外部微控制器，并簡化(hua)了設計。充電(dian)(dian)(dian)電(dian)(dian)(dian)流是可編程的(de)，并可動(dong)態調整(zheng)到高達(da) 2A；電(dian)(dian)(dian)源電(dian)(dian)(dian)路(lu)集(ji)成(cheng)到芯片上以(yi)(yi)節(jie)省(sheng)電(dian)(dian)(dian)路(lu)板空間。LT3650-4.1/4.2 不需要外部高精確度(du)電(dian)(dian)(dian)阻器來(lai)設置浮動(dong)電(dian)(dian)(dian)壓，從而進(jin)一步節(jie)省(sheng)了成(cheng)本和(he)(he)空間。應用(yong)包括(kuo)工(gong)業手(shou)持式(shi)儀表、12V 至 24V 汽車和(he)(he)重型設備、臺式(shi)插座(zuo)充電(dian)(dian)(dian)器和(he)(he)小型筆記本電(dian)(dian)(dian)腦或平板電(dian)(dian)(dian)腦。LT3650-4.1 提(ti)供 4.1V 電(dian)(dian)(dian)池(chi)浮動(dong)電(dian)(dian)(dian)壓，允(yun)許高溫(wen)安全容限(xian)，而 LT3650-4.2 具有 4.2V 最(zui)(zui)終(zhong)(zhong)充電(dian)(dian)(dian)電(dian)(dian)(dian)壓，以(yi)(yi)實(shi)現優化(hua)的(de)電(dian)(dian)(dian)池(chi)運行時(shi)間。

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

地降低了(le)噪聲和濾波(bo)需求。最終浮(fu)動電(dian)(dian)(dian)(dian)壓準(zhun)(zhun)確(que)(que)度(du)(du)規格在 ±0.5%，充電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)流(liu)準(zhun)(zhun)確(que)(que)度(du)(du)為 ±5%，C/10 檢測(ce)準(zhun)(zhun)確(que)(que)度(du)(du)為 ±2.5%。一(yi)旦(dan)充電(dian)(dian)(dian)(dian)終止(zhi)，LT3650-4.1/4.2 就(jiu)自動進入低電(dian)(dian)(dian)(dian)流(liu)備用模式(shi)，這種模式(shi)將輸入電(dian)(dian)(dian)(dian)源(yuan)電(dian)(dian)(dian)(dian)流(liu)降至(zhi) 85uA。在停機模式(shi)，輸入偏(pian)置電(dian)(dian)(dian)(dian)流(liu)被(bei)降至(zhi) 15uA。LT3650-4.1/4.2 在所有非充電(dian)(dian)(dian)(dian)周期時最大限度(du)(du)地延長了(le)電(dian)(dian)(dian)(dian)池壽命，耗用低于 1uA 的電(dian)(dian)(dian)(dian)池電(dian)(dian)(dian)(dian)流(liu)。就(jiu)安全(quan)和自主充電(dian)(dian)(dian)(dian)控制(zhi)(zhi)而言，LT3650-4.1/4.2 具有諸如自動重啟動和預查驗等(deng)功(gong)能、一(yi)個熱敏電(dian)(dian)(dian)(dian)阻輸入以(yi)用于溫度(du)(du)合格的充電(dian)(dian)(dian)(dian)、可編(bian)程輸入電(dian)(dian)(dian)(dian)流(liu)限制(zhi)(zhi)、壞電(dian)(dian)(dian)(dian)池檢測(ce)和二進制(zhi)(zhi)編(bian)碼狀態輸出引腳(jiao)。

　　LT3650-4.1 和(he)(he) LT3650-4.2 采(cai)用緊湊型、扁平(ping) (0.75mm) 12 引腳 3mm x 3mm DFN 封裝，可提供(gong) E 級和(he)(he) I 級版本，兩種(zhong)版本都(dou)在 -40°C 至 +85°C 的(de)溫(wen)度(du)范圍內(nei)工作。以 1,000 片(pian)為單位批量購買(mai)，E 級和(he)(he) I 級版本的(de)價格分(fen)別(bie)為 2.80 美元和(he)(he) 3.22 美元。

　　性(xing)能概(gai)要：LT3650-4.1 和(he) LT3650-4.2

　　* 寬輸入電壓范(fan)圍(wei)：4.75V 至 32V (40V 絕(jue)對最大值)

　　* 高達 2A 的(de)可(ke)編程(cheng)充電電流

　　* 用戶可選(xuan)終止：C/10 或可編(bian)程終止定時(shi)器(qi)

　　* 動態充電速(su)率編程/軟啟動引腳(jiao)

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

　　* 可(ke)編(bian)程輸(shu)入電流限制

　　* 1MHz 開關頻率(lv)允許(xu)使(shi)用(yong)小型外部組件

　　* ±0.5% 充電電壓準確度(du)

　　* ±5% 充電(dian)電(dian)流準(zhun)確度

　　* ±2.5% C/10 檢測準確度

　　* NTC 電阻器(qi)溫度監視(shi)器(qi)

　　* 自動再充電

　　* 自動預查驗

　　* 二進(jin)制編碼集電極開路(lu)充電狀態引腳

　　* 具自動復(fu)位的壞電池檢測

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