API9221是Diodes公司推出的鋰離子/聚合物電池充電器IC，適用于需要USB和(he)AC/DC電(dian)(dian)源適配器(qi)充電(dian)(dian)輸(shu)入的各(ge)種手持(chi)設備。該款雙輸(shu)入IC支持(chi)USB 主(zhu)機及DC適配器(qi)連接，可(ke)分別提供符合USB標準或高達1.2A的充電(dian)(dian)電(dian)(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)入可承受(shou)最(zui)大28V的電(dian)(dian)(dian)壓，因此降低了對外部保護(hu)元件的需(xu)求。當USB 輸(shu)入電(dian)(dian)(dian)壓高于5.4V 或DC適(shi)配器輸(shu)入電(dian)(dian)(dian)壓高于6.8V時，充電(dian)(dian)(dian)器會(hui)暫停充電(dian)(dian)(dian)以(yi)保護(hu)IC、電(dian)(dian)(dian)池及系統。該IC輸(shu)出還具有反向(xiang)電(dian)(dian)(dian)流保護(hu)。

   API9221采用旁(pang)路LDO 穩(wen)壓(ya)器(qi)，能(neng)夠讓主機控(kong)制器(qi)在檢(jian)測(ce)到(dao)充電(dian)器(qi)連(lian)接(jie)(jie)了不合規(gui)格(ge)的(de)電(dian)源(yuan)電(dian)壓(ya)時安(an)全保持充電(dian)器(qi)關斷，直(zhi)至連(lian)接(jie)(jie)到(dao)有效電(dian)源(yuan)后才重新運作(zuo)。該器(qi)件(jian)具有絕(jue)佳的(de)熱調節(jie)及保護功能(neng)，可以降(jiang)低充電(dian)電(dian)流以確保片(pian)芯溫度(du)在安(an)全工(gong)作(zuo)范圍內。

  API9221符(fu)合業界標準(zhun)CC/CV 充電(dian)(dian)算法，通過外部電(dian)(dian)阻(zu)器(qi)設(she)置(zhi)，用(yong)戶可配置(zhi)USB及適配器(qi)充電(dian)(dian)電(dian)(dian)流(liu)和結束(shu)充電(dian)(dian)電(dian)(dian)流(liu)。在器(qi)件工作溫度范圍內，該(gai)集成電(dian)(dian)路的誤差率僅為 1%，可確保電(dian)(dian)池充電(dian)(dian)達到4.2V。