電池化學組成的創新性 LT3652 單片降壓型電池充電器的(de)更(geng)高電(dian)壓版本 LT3652HV。LT3652HV 比 LT3652 提(ti)供更(geng)寬(kuan)的(de)電(dian)池(chi)(chi)(chi)浮置電(dian)壓范圍 (高達 18V)，并具(ju)有同(tong)樣的(de)輸入(ru)電(dian)壓調節環路(lu)(lu)，該(gai)(gai)環路(lu)(lu)控制充電(dian)電(dian)流以(yi)保持(chi)輸入(ru)電(dian)壓處(chu)于設定值(zhi)。LT3652HV 能夠(gou)靈活地用各種不(bu)同(tong)的(de)輸入(ru)電(dian)源給很多不(bu)同(tong)配置的(de)電(dian)池(chi)(chi)(chi)充電(dian)，而且當(dang)該(gai)(gai)器件連接到太陽能電(dian)池(chi)(chi)(chi)板時，其(qi)輸入(ru)調節環路(lu)(lu)保持(chi)電(dian)池(chi)(chi)(chi)板處(chu)于峰(feng)值(zhi)輸出功率狀態(tai)。

　　凌力爾特公司副總裁兼電源產品部總經理Steve Pietkiewicz表示：“LT3652HV 增強了輸出電壓能力，是我們太陽能輸入兼容型電池充電器 IC 產品線新添的(de)一個受歡(huan)迎(ying)成員。與(yu) LT3652 類似，其簡單但獨特的(de)輸入電壓調節環路電路提供(gong)幾乎與(yu)更復(fu)雜和昂貴的(de)最大峰值功率(lv)跟蹤 (MPPT) 方法同樣的(de)充電效(xiao)率(lv)。”

　　LT3652HV 接受 4.95V 至 34V 的寬輸入范圍，具有 40V 的絕對最大額定值以增加系統裕度。在輸入電源調節欠佳時 (這時輸入可能在過流狀態下崩潰)，輸入電壓調節環路還允許優化充電。該器件可為各種配置的電池組充電，包括 1 至 4 節串聯的鋰離子/聚合物電池、1 至 5 節串聯的磷酸鐵鋰 (LiFePO4) 電池和高達 18V 的密封鉛酸 (SLA) 電池。應用包括太陽能供電系統、12V 至 24V 汽車設備以及電池充電器。

　　LT3652HV 的(de)(de)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)可編程(cheng)至(zhi)高達(da) 2A。這個獨立的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)池(chi)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)器(qi)不需要外(wai)部微控制器(qi)，具有(you)用(yong)戶可選的(de)(de)終(zhong)止，包括 C/10 或內置(zhi)(zhi)定(ding)時器(qi)。該器(qi)件(jian)的(de)(de) 1MHz 固定(ding)開關頻率可實現(xian)小(xiao)的(de)(de)解決(jue)方案(an)尺寸(cun)。浮(fu)置(zhi)(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)壓反饋準(zhun)確度規定(ding)為 ?0.5%、充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)準(zhun)確度為 ?5%、C/10 檢測準(zhun)確度為 ±2.5%。一旦充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)終(zhong)止，LT3652HV 就自動(dong)進入(ru)低電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)備用(yong)模(mo)式(shi)，這種(zhong)模(mo)式(shi)將輸入(ru)電(dian)(dian)(dian)(dian)(dian)(dian)源電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)降至(zhi) 85uA。在(zai)停(ting)機模(mo)式(shi)，輸入(ru)偏(pian)置(zhi)(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)降至(zhi) 15uA。就自主充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)控制而言，如(ru)果電(dian)(dian)(dian)(dian)(dian)(dian)池(chi)電(dian)(dian)(dian)(dian)(dian)(dian)壓降至(zhi)比設定(ding)的(de)(de)浮(fu)置(zhi)(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)壓低 2.5%，那么自動(dong)再充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)功(gong)能就啟動(dong)一個新的(de)(de)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)周期(qi)。

性能概(gai)要：LT3652HV

　　?太陽能電源電壓調節(jie)環路在(zai)太陽能應用中(zhong)實現峰值跟蹤

　　?寬輸入電壓范圍(wei)：4.95V 至 34V (40V 絕對(dui)最大額定值)

　　?可(ke)編程充電電流高達 2A

　　?多種化學組(zu)成(cheng)：電阻器可編(bian)程浮(fu)置電壓高達 18V，適合(he)鋰離子/聚合(he)物 (1 至(zhi) 4 節(jie))、LiFePO4 (1 至(zhi) 5 節(jie)) 和 SLA 化學組(zu)成(cheng)

　　?用戶可選終止：C/10 或(huo)內置終止定(ding)時器

　　?在非充電時(shi)從電池吸取 <1uA 的電流

　　?1MHz 開關頻率允許使用小型外部(bu)組件

　　?0.5% 的浮(fu)置電壓(ya)反(fan)饋(kui)基準準確(que)度(du)

　　?±5% 的充電電流準確度

　　?NTC 電阻器溫度監(jian)視器

　　?具自動復位的壞電池檢測

　　?扁平(ping) (0.75mm) 3mm x 3mm DFN-12 封裝和 MSOP-12E 封裝

　　LT3652HV 采用(yong)耐(nai)熱增強型封(feng)裝(zhuang)：扁平 (0.75mm) 12 引腳 3mm x 3mm DFN 封(feng)裝(zhuang)和(he) 12 引線 MSOP 封(feng)裝(zhuang)。兩種封(feng)裝(zhuang)的器件都有(you) E 級和(he) I 級版本，在 -40?C 至 125?C 的溫度(du)范圍內有(you)保(bao)證。千片批購價(jia)分(fen)別為每片 3.40 美元(yuan)(yuan)和(he) 3.70 美元(yuan)(yuan)。