API9221是Diodes公司推出的鋰離子/聚合物電池充電器IC，適(shi)用(yong)于需要(yao)USB和AC/DC電(dian)源適(shi)配(pei)(pei)器充電(dian)輸(shu)入的各種手持設備(bei)。該(gai)款雙(shuang)輸(shu)入IC支持USB 主機及DC適(shi)配(pei)(pei)器連接(jie)，可分別提供符合USB標準或高(gao)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 輸入(ru)(ru)可承(cheng)受最大28V的電(dian)壓(ya)(ya)，因此降(jiang)低了對(dui)外部保(bao)護元件的需(xu)求(qiu)。當USB 輸入(ru)(ru)電(dian)壓(ya)(ya)高于5.4V 或DC適(shi)配器輸入(ru)(ru)電(dian)壓(ya)(ya)高于6.8V時，充(chong)電(dian)器會暫(zan)停充(chong)電(dian)以保(bao)護IC、電(dian)池及系統。該IC輸出還具有反向電(dian)流(liu)保(bao)護。

   API9221采用旁路LDO 穩壓器，能夠讓(rang)主機控制(zhi)器在(zai)檢測到(dao)充電器連(lian)接了不(bu)合規格(ge)的(de)電源(yuan)電壓時安全保持充電器關(guan)斷(duan)，直至(zhi)連(lian)接到(dao)有(you)效電源(yuan)后才重新(xin)運(yun)作。該器件具有(you)絕(jue)佳的(de)熱調(diao)節(jie)及保護功(gong)能，可(ke)以降低充電電流以確保片芯溫度在(zai)安全工(gong)作范(fan)圍(wei)內。

  API9221符合業(ye)界(jie)標準CC/CV 充(chong)電(dian)(dian)(dian)算法，通過外部電(dian)(dian)(dian)阻器(qi)設置，用戶可配(pei)置USB及適(shi)配(pei)器(qi)充(chong)電(dian)(dian)(dian)電(dian)(dian)(dian)流(liu)和結束充(chong)電(dian)(dian)(dian)電(dian)(dian)(dian)流(liu)。在(zai)器(qi)件工(gong)作溫度范圍內，該集成電(dian)(dian)(dian)路的(de)誤(wu)差率僅(jin)為 1%，可確(que)保電(dian)(dian)(dian)池充(chong)電(dian)(dian)(dian)達到4.2V。