電池化學組成的創新性 LT3652 單片降壓型電池充電器的更高電壓版本(ben) LT3652HV。LT3652HV 比 LT3652 提供更寬(kuan)的電池(chi)浮置(zhi)電壓范圍 (高達 18V)，并具有(you)同(tong)(tong)樣的輸入電壓調節(jie)環路(lu)，該環路(lu)控制充電電流(liu)以保(bao)持(chi)輸入電壓處于(yu)設(she)定值(zhi)。LT3652HV 能夠靈活地用各種不(bu)同(tong)(tong)的輸入電源給很(hen)多不(bu)同(tong)(tong)配(pei)置(zhi)的電池(chi)充電，而且當該器件連接到太陽(yang)能電池(chi)板時(shi)，其輸入調節(jie)環路(lu)保(bao)持(chi)電池(chi)板處于(yu)峰值(zhi)輸出功率(lv)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 產品線(xian)新添(tian)的(de)一(yi)個受歡迎成(cheng)員。與(yu) LT3652 類似，其(qi)簡單但獨(du)特(te)的(de)輸入(ru)電壓調節環路電路提供幾乎與(yu)更復(fu)雜(za)和昂貴的(de)最大峰值功率(lv)跟蹤 (MPPT) 方法(fa)同(tong)樣的(de)充(chong)電效率(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 的充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)可編(bian)程至高達(da) 2A。這個獨立的電(dian)(dian)(dian)(dian)(dian)(dian)池充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)器不需要外部微(wei)控(kong)制器，具有用(yong)戶可選的終止(zhi)，包(bao)括 C/10 或(huo)內置(zhi)(zhi)定(ding)(ding)時(shi)器。該器件的 1MHz 固定(ding)(ding)開關頻(pin)率可實現小的解決(jue)方(fang)案尺寸。浮(fu)置(zhi)(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)反饋準確度(du)規定(ding)(ding)為 ?0.5%、充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)準確度(du)為 ?5%、C/10 檢測準確度(du)為 ±2.5%。一(yi)旦充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)終止(zhi)，LT3652HV 就(jiu)自動進(jin)入低電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)備用(yong)模(mo)(mo)式(shi)，這種模(mo)(mo)式(shi)將輸入電(dian)(dian)(dian)(dian)(dian)(dian)源電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)降至 85uA。在(zai)停(ting)機模(mo)(mo)式(shi)，輸入偏置(zhi)(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)降至 15uA。就(jiu)自主充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)控(kong)制而言(yan)，如(ru)果電(dian)(dian)(dian)(dian)(dian)(dian)池電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)降至比設定(ding)(ding)的浮(fu)置(zhi)(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)低 2.5%，那么(me)自動再充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)功能就(jiu)啟動一(yi)個新的充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)周期(qi)。

性能概(gai)要：LT3652HV

　　?太(tai)陽(yang)能電源(yuan)電壓調節環(huan)路在太(tai)陽(yang)能應(ying)用中實現峰值跟蹤(zong)

　　?寬輸入電壓范(fan)圍：4.95V 至 34V (40V 絕對最大(da)額定值)

　　?可編程充電電流高達 2A

　　?多種(zhong)化學組成：電(dian)阻器可編(bian)程浮置電(dian)壓高達 18V，適合鋰(li)離子/聚合物(wu) (1 至 4 節)、LiFePO4 (1 至 5 節) 和 SLA 化學組成

　　?用戶可選終止：C/10 或內置(zhi)終止定時器

　　?在(zai)非(fei)充(chong)電時從電池吸取 <1uA 的電流

　　?1MHz 開關頻率(lv)允許使用小型(xing)外部(bu)組(zu)件

　　?0.5% 的浮置電壓反饋基準準確(que)度(du)

　　?±5% 的(de)充電電流準確度

　　?NTC 電阻器(qi)溫度監(jian)視器(qi)

　　?具自(zi)動復位的(de)壞(huai)電池(chi)檢(jian)測

　　?扁平 (0.75mm) 3mm x 3mm DFN-12 封(feng)裝和 MSOP-12E 封(feng)裝

　　LT3652HV 采用耐熱增(zeng)強型封裝：扁平 (0.75mm) 12 引腳 3mm x 3mm DFN 封裝和(he) 12 引線 MSOP 封裝。兩種(zhong)封裝的器件都有 E 級和(he) I 級版本，在 -40?C 至 125?C 的溫度(du)范圍內有保證(zheng)。千片(pian)批購價分別為每片(pian) 3.40 美元(yuan)和(he) 3.70 美元(yuan)。