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)壓(ya)(ya)(ya)版本(ben) LT3652HV。LT3652HV 比 LT3652 提供(gong)更(geng)寬的電(dian)(dian)池(chi)浮(fu)置電(dian)(dian)壓(ya)(ya)(ya)范圍 (高達 18V)，并具有(you)同樣的輸(shu)(shu)入(ru)(ru)電(dian)(dian)壓(ya)(ya)(ya)調(diao)節環路(lu)，該(gai)環路(lu)控制充(chong)電(dian)(dian)電(dian)(dian)流(liu)以保(bao)持輸(shu)(shu)入(ru)(ru)電(dian)(dian)壓(ya)(ya)(ya)處(chu)于設定值(zhi)。LT3652HV 能夠靈(ling)活地用各種不(bu)(bu)同的輸(shu)(shu)入(ru)(ru)電(dian)(dian)源給很多不(bu)(bu)同配(pei)置的電(dian)(dian)池(chi)充(chong)電(dian)(dian)，而且當該(gai)器(qi)件連接到太陽(yang)能電(dian)(dian)池(chi)板時(shi)，其輸(shu)(shu)入(ru)(ru)調(diao)節環路(lu)保(bao)持電(dian)(dian)池(chi)板處(chu)于峰值(zhi)輸(shu)(shu)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 產品線(xian)新添的(de)一個(ge)受歡迎(ying)成員(yuan)。與(yu) LT3652 類似，其(qi)簡單但獨特的(de)輸(shu)入(ru)電(dian)壓調節環路(lu)電(dian)路(lu)提供(gong)幾(ji)乎與(yu)更復(fu)雜(za)和昂(ang)貴的(de)最大峰值功率(lv)跟(gen)蹤 (MPPT) 方法(fa)同樣(yang)的(de)充電(dian)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)(de)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)流(liu)可編程至高(gao)達 2A。這個(ge)獨立的(de)(de)電(dian)(dian)(dian)(dian)(dian)池充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)器不需要外部(bu)微控制(zhi)器，具有用(yong)戶(hu)可選的(de)(de)終止，包括(kuo) C/10 或內置(zhi)定(ding)時器。該器件的(de)(de) 1MHz 固(gu)定(ding)開關頻率(lv)可實現小的(de)(de)解決方案尺(chi)寸(cun)。浮(fu)(fu)置(zhi)電(dian)(dian)(dian)(dian)(dian)壓(ya)反饋準(zhun)確(que)度(du)(du)規定(ding)為 ?0.5%、充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)流(liu)準(zhun)確(que)度(du)(du)為 ?5%、C/10 檢測準(zhun)確(que)度(du)(du)為 ±2.5%。一旦充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)終止，LT3652HV 就自動(dong)進入低(di)電(dian)(dian)(dian)(dian)(dian)流(liu)備用(yong)模(mo)式，這種模(mo)式將輸入電(dian)(dian)(dian)(dian)(dian)源電(dian)(dian)(dian)(dian)(dian)流(liu)降至 85uA。在停機模(mo)式，輸入偏置(zhi)電(dian)(dian)(dian)(dian)(dian)流(liu)降至 15uA。就自主(zhu)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)控制(zhi)而言，如果(guo)電(dian)(dian)(dian)(dian)(dian)池電(dian)(dian)(dian)(dian)(dian)壓(ya)降至比設定(ding)的(de)(de)浮(fu)(fu)置(zhi)電(dian)(dian)(dian)(dian)(dian)壓(ya)低(di) 2.5%，那么自動(dong)再充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)功能就啟動(dong)一個(ge)新的(de)(de)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)周期。

性能概要：LT3652HV

　　?太陽(yang)能(neng)電(dian)源電(dian)壓調(diao)節環(huan)路(lu)在太陽(yang)能(neng)應用中(zhong)實現峰值跟蹤(zong)

　　?寬輸入電壓范圍：4.95V 至 34V (40V 絕(jue)對最(zui)大額定值)

　　?可編(bian)程(cheng)充電(dian)電(dian)流(liu)高達 2A

　　?多種化(hua)學(xue)組成(cheng)：電阻(zu)器可編(bian)程(cheng)浮(fu)置電壓(ya)高達 18V，適合(he)鋰離子(zi)/聚合(he)物 (1 至 4 節)、LiFePO4 (1 至 5 節) 和(he) SLA 化(hua)學(xue)組成(cheng)

　　?用戶可選(xuan)終(zhong)止：C/10 或內置終(zhong)止定時器

　　?在非充電時從電池吸取(qu) <1uA 的電流

　　?1MHz 開(kai)關頻率允(yun)許使(shi)用小型(xing)外部組件

　　?0.5% 的浮置電壓反饋基準(zhun)準(zhun)確(que)度

　　?±5% 的充電(dian)電(dian)流準確度

　　?NTC 電阻器溫(wen)度(du)監視器

　　?具(ju)自動復位的壞(huai)電池(chi)檢測

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

　　LT3652HV 采(cai)用耐熱增強型封裝(zhuang)：扁(bian)平(ping) (0.75mm) 12 引腳 3mm x 3mm DFN 封裝(zhuang)和(he)(he)(he) 12 引線 MSOP 封裝(zhuang)。兩(liang)種封裝(zhuang)的器件都有 E 級(ji)和(he)(he)(he) I 級(ji)版本，在 -40?C 至 125?C 的溫度(du)范圍內有保證。千片批購價分別為(wei)每片 3.40 美元和(he)(he)(he) 3.70 美元。