微型模塊電池充電器
凌力爾特公司(Linear Technology Corporation) 推出 LTM8061 和 LTM8062,這兩款器件已開始供貨,它們是一個新型完整系統級封裝 μModule? 充電器系列中(zhong)率先面市的器(qi)件,可支持一(yi)(yi)個高達 2A 的輸出充(chong)電(dian)(dian)電(dian)(dian)流。這兩款器(qi)件均提供(gong)了一(yi)(yi)種完整和高效的 1MHz 開關降(jiang)壓型充(chong)電(dian)(dian)器(qi)解決方(fang)案,只需使用(yong)一(yi)(yi)個輸入電(dian)(dian)容器(qi)。LTM8061 具備有源(yuan)輸入電(dian)(dian)流管理(li)功能,以避免(mian)電(dian)(dian)源(yuan)軌電(dian)(dian)壓下降(jiang)并向負載輸送最大的充(chong)電(dian)(dian)電(dian)(dian)流。
LTM8062 可主(zhu)動地管理(li)輸(shu)出充電(dian)電(dian)流(liu),盡量(liang)增加從一個(ge)運(yun)用最(zui)大峰值功率(lv)跟蹤 (MPPT) 原理(li)的太陽(yang)能電(dian)池(chi)所提(ti)供的功率(lv)。LTM8061 和(he) LTM8062 可在 4.95V 至 32V 的輸(shu)入電(dian)壓范圍內運(yun)作(zuo),并支持預查驗、恒定電(dian)流(liu)和(he)恒定電(dian)壓模式操作(zuo)。準確(que)(que)度分別為 0.5% 和(he) 0.75% 的浮(fu)動電(dian)壓確(que)(que)保在充電(dian)操作(zuo)終(zhong)止 (由一個(ge)最(zui)小電(dian)流(liu)門限檢測或可調內部超時設定) 時實(shi)現最(zui)大的能量(liang)存(cun)儲。
LTM8061特別適用于給鋰離子電池或鋰聚(ju)合物電(dian)(dian)池(chi)(chi)(chi)充(chong)電(dian)(dian),并具有 4.1V、4.2V、8.2V 和 8.4V的(de)浮動電(dian)(dian)壓。一個可(ke)在外(wai)部調(diao)節的(de)浮動電(dian)(dian)壓使(shi) LTM8062 能支(zhi)持單節和多(duo)節鋰離子電(dian)(dian)池(chi)(chi)(chi)、鋰聚(ju)合物電(dian)(dian)池(chi)(chi)(chi)、磷酸鐵鋰電(dian)(dian)池(chi)(chi)(chi)(LiFePO4)和密封鉛酸 (SLA) 電(dian)(dian)池(chi)(chi)(chi)充(chong)電(dian)(dian)至 14.4V。
為了保持(chi)電(dian)(dian)(dian)池處于滿充電(dian)(dian)(dian)狀態,一旦(dan)電(dian)(dian)(dian)池電(dian)(dian)(dian)壓降至比浮置電(dian)(dian)(dian)壓低 2.5% 時,LTM8061 和(he)(he) LTM8062 就自動(dong)啟動(dong)再充電(dian)(dian)(dian)周期。安全功能包括壞電(dian)(dian)(dian)池檢測(ce)和(he)(he)具故障指示并適用(yong)于 LED 的(de) NTC 電(dian)(dian)(dian)阻器(qi)輸入(ru)。當電(dian)(dian)(dian)源(yuan)不存在(zai)時,內部(bu)輸入(ru)反向(xiang)電(dian)(dian)(dian)壓隔離二(er)極管(guan)可用(yong)來防止電(dian)(dian)(dian)池的(de)泄漏電(dian)(dian)(dian)流。LTM8061 和(he)(he) LTM8062 采用(yong) RoHS 兼容的(de) 9mm x 15mm x 4.32mm LGA 封裝,千片批購價分別為每片 8.85 美元和(he)(he) 9.85 美元。