電池化學組成的創新性 LT3652 單片降壓型電池充電器的更(geng)高電(dian)(dian)(dian)(dian)壓(ya)版本 LT3652HV。LT3652HV 比 LT3652 提供(gong)更(geng)寬的電(dian)(dian)(dian)(dian)池浮置電(dian)(dian)(dian)(dian)壓(ya)范圍 (高達 18V)，并具有同(tong)樣的輸入電(dian)(dian)(dian)(dian)壓(ya)調(diao)節環(huan)路，該(gai)環(huan)路控制(zhi)充電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)流以(yi)保持輸入電(dian)(dian)(dian)(dian)壓(ya)處于(yu)設(she)定值。LT3652HV 能(neng)夠(gou)靈(ling)活地用各種(zhong)不(bu)同(tong)的輸入電(dian)(dian)(dian)(dian)源給很(hen)多不(bu)同(tong)配置的電(dian)(dian)(dian)(dian)池充電(dian)(dian)(dian)(dian)，而且當(dang)該(gai)器件連接(jie)到(dao)太陽(yang)能(neng)電(dian)(dian)(dian)(dian)池板時，其輸入調(diao)節環(huan)路保持電(dian)(dian)(dian)(dian)池板處于(yu)峰值輸出功率狀態。

　　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(pin)線新(xin)添的一(yi)個(ge)受歡(huan)迎(ying)成(cheng)員。與 LT3652 類似，其簡單但獨特的輸入電(dian)壓調節環路(lu)電(dian)路(lu)提供(gong)幾乎與更復(fu)雜和昂貴的最大峰值功率(lv)跟(gen)蹤 (MPPT) 方法同樣(yang)的充電(dian)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)(de)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)流可編(bian)程(cheng)至(zhi)高達 2A。這(zhe)個獨(du)立的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)池充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)器不需要外部微控制器，具有用戶可選的(de)(de)(de)終(zhong)止，包括 C/10 或內置(zhi)定時(shi)器。該器件的(de)(de)(de) 1MHz 固定開關頻率可實現小(xiao)的(de)(de)(de)解決方案(an)尺寸。浮置(zhi)電(dian)(dian)(dian)(dian)(dian)壓反饋準(zhun)確(que)度(du)規(gui)定為(wei) ?0.5%、充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)流準(zhun)確(que)度(du)為(wei) ?5%、C/10 檢測準(zhun)確(que)度(du)為(wei) ±2.5%。一旦充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)終(zhong)止，LT3652HV 就自動(dong)進入低電(dian)(dian)(dian)(dian)(dian)流備用模(mo)(mo)式，這(zhe)種模(mo)(mo)式將輸入電(dian)(dian)(dian)(dian)(dian)源(yuan)電(dian)(dian)(dian)(dian)(dian)流降至(zhi) 85uA。在停機模(mo)(mo)式，輸入偏置(zhi)電(dian)(dian)(dian)(dian)(dian)流降至(zhi) 15uA。就自主充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)控制而(er)言，如果電(dian)(dian)(dian)(dian)(dian)池電(dian)(dian)(dian)(dian)(dian)壓降至(zhi)比設(she)定的(de)(de)(de)浮置(zhi)電(dian)(dian)(dian)(dian)(dian)壓低 2.5%，那(nei)么(me)自動(dong)再充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)功能(neng)就啟動(dong)一個新的(de)(de)(de)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)周期(qi)。

性能概要(yao)：LT3652HV

　　?太陽能電源(yuan)電壓調節環路在(zai)太陽能應用中實現峰值跟蹤

　　?寬輸(shu)入電(dian)壓范圍(wei)：4.95V 至 34V (40V 絕對最(zui)大額定值)

　　?可編程充電電流高達 2A

　　?多種化學組成：電阻器(qi)可編程浮置電壓高達 18V，適(shi)合鋰離子/聚合物 (1 至(zhi) 4 節)、LiFePO4 (1 至(zhi) 5 節) 和 SLA 化學組成

　　?用(yong)戶可選終止：C/10 或(huo)內置終止定(ding)時器

　　?在非充電(dian)時(shi)從電(dian)池吸取 <1uA 的電(dian)流

　　?1MHz 開(kai)關頻率允許(xu)使(shi)用小型外部組件

　　?0.5% 的浮置電(dian)壓反饋基準(zhun)準(zhun)確(que)度

　　?±5% 的充(chong)電(dian)電(dian)流準(zhun)確度

　　?NTC 電(dian)阻器溫度監視器

　　?具自(zi)動復位的壞電池(chi)檢測

　　?扁平 (0.75mm) 3mm x 3mm DFN-12 封裝(zhuang)和 MSOP-12E 封裝(zhuang)

　　LT3652HV 采用耐(nai)熱(re)增強型(xing)封(feng)裝：扁(bian)平 (0.75mm) 12 引(yin)(yin)腳 3mm x 3mm DFN 封(feng)裝和(he) 12 引(yin)(yin)線 MSOP 封(feng)裝。兩(liang)種(zhong)封(feng)裝的(de)器(qi)件都有(you) E 級(ji)和(he) I 級(ji)版本，在 -40?C 至 125?C 的(de)溫度范圍內有(you)保證(zheng)。千(qian)片(pian)批購(gou)價(jia)分別為每片(pian) 3.40 美(mei)元和(he) 3.70 美(mei)元。