凌力爾特公司(LinearTechnologyCorporation)推出單片線性電源管理器、理想二極管控制器和獨立電池充電器LTC4067，該器(qi)(qi)件(jian)適(shi)用于便攜式產品和電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)備份系(xi)統(tong)。LTC4067可(ke)以接受USB電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)、交流(liu)(liu)適(shi)配(pei)器(qi)(qi)或(huo)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)。它具有(you)PowerPath控(kong)制功(gong)能，可(ke)向外(wai)部設備供電(dian)(dian)(dian)(dian)(dian)(dian)(dian)，也可(ke)從(cong)USB總線或(huo)交流(liu)(liu)適(shi)配(pei)器(qi)(qi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)給單節鋰離子/聚(ju)合物(wu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)。該器(qi)(qi)件(jian)有(you)片上內(nei)部過壓控(kong)制電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路，與外(wai)部P溝道MOSFET配(pei)合使用時，對輸(shu)入(ru)提供13V保護。系(xi)統(tong)負載電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)增大時，LTC4067自動降(jiang)低電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)，從(cong)而(er)確(que)保輸(shu)入(ru)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)不超過編程(cheng)值。為了在總線連接時保持(chi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)充分充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)，該集成電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路將電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)直接導引到負載處(chu)，而(er)不是從(cong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)中(zhong)抽(chou)取功(gong)率。一(yi)旦電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)被去掉(diao)，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)就(jiu)通過內(nei)部200mΩ低損耗(hao)理想(xiang)二極管從(cong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)流(liu)(liu)向負載，從(cong)而(er)最大限度地降(jiang)低了壓降(jiang)和功(gong)耗(hao)。

    用(yong)交流(liu)(liu)適(shi)配(pei)器(qi)(qi)供(gong)電(dian)(dian)(dian)(dian)(dian)時，LTC4067能夠以高達1.5A對電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)進行(xing)快速充(chong)電(dian)(dian)(dian)(dian)(dian)，也可(ke)通(tong)過(guo)外部引腳選擇而(er)把充(chong)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)限(xian)制為(wei)全(quan)標度電(dian)(dian)(dian)(dian)(dian)阻器(qi)(qi)編程值(zhi)的20%或100%，以符合USB輸(shu)入電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)限(xian)值(zhi)規范。電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)浮動電(dian)(dian)(dian)(dian)(dian)壓預置為(wei)4.2V，在整(zheng)個(ge)工業溫度范圍內保證0.8%的準確度。其它充(chong)電(dian)(dian)(dian)(dian)(dian)器(qi)(qi)功能包括熱調節(jie)、自動再充(chong)電(dian)(dian)(dian)(dian)(dian)、NTC熱敏電(dian)(dian)(dian)(dian)(dian)阻輸(shu)入、涓流(liu)(liu)充(chong)電(dian)(dian)(dian)(dian)(dian)和壞(huai)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)單元檢(jian)測。

    LTC4067采用纖巧(qiao)、扁平(ping)(0.75mm)12引腳4mmx3mmDFN封裝，在-40℃至85℃的溫度(du)范圍內保證(zheng)工作。以1,000片為單位批量購買，每片起價為1.70美元。

    LTC4067性能概要：

    電池(chi)充電器/PowerPath管理(li)器：

    *13V過壓保護(hu)控(kong)制器

    *具4.2V浮動電壓的全功能電池充電器

    *高達1.5A的可編(bian)程充電(dian)電(dian)流

    *熱調節最大(da)限度地增大(da)了(le)充電電流，無過(guo)熱風(feng)險

    *始自電(dian)壓模(mo)式充電(dian)的內部兩小(xiao)時(shi)充電(dian)終止定時(shi)器(qi)

    *可進行至電(dian)池電(dian)源的自動負(fu)載切換，并具有內部理想二極管和用于可選外(wai)部MOSFET的驅動輸出

    *NTC熱敏(min)電阻輸(shu)入

    *失效電池超時檢測

    可(ke)編程輸(shu)入(ru)電(dian)流限制：

    *用CLPROG引腳上的單個電阻設置和監視輸入電流(liu)

    *扁平(0.75mm)4mmx3mm12引(yin)線DFN封裝(zhuang)