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AC/DC電源適配器(qi)充(chong)電輸入(ru)的各種(zhong)手(shou)持設備。該款雙(shuang)輸入(ru)IC支(zhi)持USB 主(zhu)機及DC適配器(qi)連接，可分別提供符合USB標準或高(gao)達(da)1.2A的充(chong)電電流(liu)。 

   為確保設備能夠支持各種OEM 及售后市場充電器，API9221 輸入(ru)可承受最大28V的電(dian)壓(ya)，因(yin)此降低了對外部保(bao)護(hu)(hu)元件的需(xu)求。當USB 輸入(ru)電(dian)壓(ya)高(gao)(gao)于(yu)5.4V 或(huo)DC適配器(qi)輸入(ru)電(dian)壓(ya)高(gao)(gao)于(yu)6.8V時，充電(dian)器(qi)會暫停充電(dian)以保(bao)護(hu)(hu)IC、電(dian)池及系統(tong)。該(gai)IC輸出還具有反向電(dian)流保(bao)護(hu)(hu)。

   API9221采用旁(pang)路LDO 穩壓(ya)器(qi)，能夠讓主機控制器(qi)在(zai)檢(jian)測(ce)到充(chong)電(dian)器(qi)連(lian)接(jie)了不(bu)合規格的電(dian)源(yuan)電(dian)壓(ya)時(shi)安(an)全保持充(chong)電(dian)器(qi)關斷，直至(zhi)連(lian)接(jie)到有效(xiao)電(dian)源(yuan)后才重新(xin)運作(zuo)。該器(qi)件具有絕佳的熱調(diao)節及(ji)保護(hu)功(gong)能，可以降低充(chong)電(dian)電(dian)流以確保片(pian)芯溫度(du)在(zai)安(an)全工作(zuo)范(fan)圍內。

  API9221符(fu)合業(ye)界標準CC/CV 充電(dian)(dian)(dian)算法，通過外部電(dian)(dian)(dian)阻(zu)器(qi)設置(zhi)，用戶可配置(zhi)USB及適配器(qi)充電(dian)(dian)(dian)電(dian)(dian)(dian)流和結束充電(dian)(dian)(dian)電(dian)(dian)(dian)流。在器(qi)件工作(zuo)溫度范圍內，該集成電(dian)(dian)(dian)路的誤差率僅為(wei) 1%，可確(que)保電(dian)(dian)(dian)池充電(dian)(dian)(dian)達(da)到4.2V。