API9221是Diodes公司推出的鋰離子/聚合物電池充電器IC，適(shi)(shi)用于需要USB和AC/DC電(dian)源適(shi)(shi)配(pei)器(qi)充電(dian)輸入的各種手持設備(bei)。該(gai)款雙輸入IC支持USB 主機(ji)及DC適(shi)(shi)配(pei)器(qi)連接，可分別提供符合(he)USB標(biao)準(zhun)或高達1.2A的充電(dian)電(dian)流。 

   為確保設備能夠支持各種OEM 及售后市場充電器，API9221 輸(shu)入(ru)可承受最大28V的電(dian)(dian)(dian)壓，因(yin)此(ci)降低了對外部保護元件的需求。當USB 輸(shu)入(ru)電(dian)(dian)(dian)壓高于5.4V 或DC適配器輸(shu)入(ru)電(dian)(dian)(dian)壓高于6.8V時，充電(dian)(dian)(dian)器會暫(zan)停充電(dian)(dian)(dian)以保護IC、電(dian)(dian)(dian)池及系統。該(gai)IC輸(shu)出(chu)還具有反向電(dian)(dian)(dian)流保護。

   API9221采(cai)用旁路(lu)LDO 穩壓器(qi)，能夠讓主機控制器(qi)在檢測到(dao)充電(dian)器(qi)連(lian)接了不合規格的(de)(de)電(dian)源電(dian)壓時安(an)(an)全(quan)(quan)保持(chi)充電(dian)器(qi)關(guan)斷(duan)，直至連(lian)接到(dao)有效電(dian)源后才重新(xin)運(yun)作。該(gai)器(qi)件具有絕佳(jia)的(de)(de)熱調節及保護功能，可以(yi)降(jiang)低充電(dian)電(dian)流以(yi)確保片芯溫(wen)度在安(an)(an)全(quan)(quan)工(gong)作范圍內。

  API9221符合業界標準CC/CV 充(chong)(chong)電(dian)(dian)(dian)算法，通過(guo)外部(bu)電(dian)(dian)(dian)阻(zu)器設置，用(yong)戶可配置USB及(ji)適配器充(chong)(chong)電(dian)(dian)(dian)電(dian)(dian)(dian)流和(he)結(jie)束充(chong)(chong)電(dian)(dian)(dian)電(dian)(dian)(dian)流。在器件(jian)工作溫度(du)范圍內，該(gai)集成(cheng)電(dian)(dian)(dian)路的誤差(cha)率(lv)僅為 1%，可確保電(dian)(dian)(dian)池充(chong)(chong)電(dian)(dian)(dian)達到4.2V。