電池化學組成的創新性 LT3652 單片降壓型電池充電器的更(geng)高電壓版(ban)本 LT3652HV。LT3652HV 比 LT3652 提供更(geng)寬的電池(chi)浮置(zhi)電壓范圍(wei) (高達 18V)，并具有同(tong)(tong)樣的輸入電壓調節(jie)環(huan)路(lu)，該環(huan)路(lu)控(kong)制充電電流以(yi)保(bao)持輸入電壓處于設定值(zhi)。LT3652HV 能夠靈活地用(yong)各種不同(tong)(tong)的輸入電源給很多不同(tong)(tong)配置(zhi)的電池(chi)充電，而且當該器件連接到(dao)太陽能電池(chi)板(ban)時，其輸入調節(jie)環(huan)路(lu)保(bao)持電池(chi)板(ban)處于峰值(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 產品線新(xin)添的一個(ge)受(shou)歡迎成員(yuan)。與(yu) LT3652 類(lei)似(si)，其簡單但獨特(te)的輸入電壓(ya)調節環路電路提供幾乎與(yu)更復雜和昂貴(gui)的最(zui)大峰值功率(lv)跟蹤 (MPPT) 方(fang)法同樣的充電效率(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(de)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)可(ke)編程至高達 2A。這個(ge)獨立的(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)不需要外部(bu)微控制(zhi)器(qi)，具有(you)用(yong)戶可(ke)選的(de)終止，包括 C/10 或內(nei)置定(ding)(ding)時器(qi)。該(gai)器(qi)件的(de) 1MHz 固定(ding)(ding)開(kai)關頻(pin)率可(ke)實(shi)現(xian)小的(de)解決方案尺寸。浮置電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)反饋準(zhun)確度規定(ding)(ding)為(wei) ?0.5%、充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)準(zhun)確度為(wei) ?5%、C/10 檢測準(zhun)確度為(wei) ±2.5%。一(yi)旦充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)終止，LT3652HV 就(jiu)自動(dong)進(jin)入(ru)低(di)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)備用(yong)模式(shi)，這種(zhong)模式(shi)將輸(shu)入(ru)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)降至 85uA。在停機模式(shi)，輸(shu)入(ru)偏(pian)置電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)降至 15uA。就(jiu)自主充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)控制(zhi)而言，如果電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)降至比設定(ding)(ding)的(de)浮置電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)低(di) 2.5%，那么自動(dong)再(zai)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)功能就(jiu)啟動(dong)一(yi)個(ge)新(xin)的(de)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)周期。

性(xing)能概(gai)要(yao)：LT3652HV

　　?太(tai)陽(yang)能電(dian)源(yuan)電(dian)壓(ya)調節環(huan)路在(zai)太(tai)陽(yang)能應用中實現峰值(zhi)跟蹤(zong)

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

　　?可編程(cheng)充電電流高達 2A

　　?多種化學組成：電阻器可(ke)編程浮置電壓高達(da) 18V，適合鋰離(li)子/聚合物(wu) (1 至(zhi) 4 節)、LiFePO4 (1 至(zhi) 5 節) 和 SLA 化學組成

　　?用戶(hu)可選終止：C/10 或內置終止定時器

　　?在非充(chong)電(dian)時從電(dian)池(chi)吸取 <1uA 的(de)電(dian)流

　　?1MHz 開關頻率允許(xu)使用小型外部組件

　　?0.5% 的浮置電壓反饋基準準確度

　　?±5% 的(de)充電電流準確(que)度

　　?NTC 電(dian)阻器(qi)(qi)溫度(du)監(jian)視器(qi)(qi)

　　?具自動復位的壞電池檢測

　　?扁(bian)平(ping) (0.75mm) 3mm x 3mm DFN-12 封(feng)裝和 MSOP-12E 封(feng)裝

　　LT3652HV 采(cai)用耐(nai)熱增強型封(feng)裝(zhuang)(zhuang)：扁平 (0.75mm) 12 引腳 3mm x 3mm DFN 封(feng)裝(zhuang)(zhuang)和(he) 12 引線 MSOP 封(feng)裝(zhuang)(zhuang)。兩種封(feng)裝(zhuang)(zhuang)的器件都有 E 級和(he) I 級版本，在 -40?C 至(zhi) 125?C 的溫度(du)范圍內(nei)有保(bao)證(zheng)。千片批(pi)購價(jia)分別(bie)為每片 3.40 美元(yuan)和(he) 3.70 美元(yuan)。