API9221是Diodes公司推出的鋰離子/聚合物電池充電器IC，適(shi)用于需要USB和AC/DC電(dian)源適(shi)配(pei)器充電(dian)輸入的(de)(de)各(ge)種手持(chi)設備。該(gai)款雙(shuang)輸入IC支(zhi)持(chi)USB 主機及DC適(shi)配(pei)器連接(jie)，可分別提(ti)供符(fu)合USB標準或高達1.2A的(de)(de)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)(shu)入(ru)(ru)可承(cheng)受最大28V的電(dian)(dian)(dian)(dian)壓，因此降(jiang)低了(le)對外部保(bao)護元(yuan)件的需求(qiu)。當USB 輸(shu)(shu)入(ru)(ru)電(dian)(dian)(dian)(dian)壓高于5.4V 或DC適(shi)配器輸(shu)(shu)入(ru)(ru)電(dian)(dian)(dian)(dian)壓高于6.8V時，充電(dian)(dian)(dian)(dian)器會暫停充電(dian)(dian)(dian)(dian)以保(bao)護IC、電(dian)(dian)(dian)(dian)池及系(xi)統。該IC輸(shu)(shu)出還具有反向電(dian)(dian)(dian)(dian)流保(bao)護。

   API9221采用旁路LDO 穩壓器，能夠(gou)讓主機控(kong)制器在檢測到充(chong)電(dian)(dian)(dian)器連接(jie)了不合(he)規格的(de)電(dian)(dian)(dian)源電(dian)(dian)(dian)壓時安全保持充(chong)電(dian)(dian)(dian)器關斷，直至(zhi)連接(jie)到有(you)效電(dian)(dian)(dian)源后才重新運作(zuo)。該(gai)器件具有(you)絕佳的(de)熱調(diao)節及保護(hu)功能，可以(yi)降低充(chong)電(dian)(dian)(dian)電(dian)(dian)(dian)流以(yi)確保片芯溫度在安全工作(zuo)范圍內。

  API9221符合(he)業界標準CC/CV 充(chong)電算法，通(tong)過外部電阻器(qi)(qi)設置(zhi)，用戶可(ke)(ke)配置(zhi)USB及適(shi)配器(qi)(qi)充(chong)電電流(liu)(liu)和結束充(chong)電電流(liu)(liu)。在(zai)器(qi)(qi)件(jian)工作溫度范圍內，該(gai)集成(cheng)電路的誤差率僅(jin)為 1%，可(ke)(ke)確保電池(chi)充(chong)電達(da)到4.2V。