一、電源管理ic是干什么用的

PMIC（Power Management IC）又稱電源管理ic，是一種特定用途的集成電(dian)路，其功能是為主系統作(zuo)管理(li)電(dian)源等工(gong)作(zuo)。

PMIC常用于(yu)以電(dian)(dian)池(chi)作為電(dian)(dian)源(yuan)的裝置，例如移(yi)動電(dian)(dian)話(hua)或便攜式媒體播放器(qi)。由于(yu)這類裝置一(yi)般有多(duo)于(yu)一(yi)個(ge)電(dian)(dian)源(yuan)（例如電(dian)(dian)池(chi)及USB電(dian)(dian)源(yuan)），系統又需(xu)要(yao)多(duo)個(ge)不同電(dian)(dian)壓的電(dian)(dian)源(yuan)，加上(shang)要(yao)控制電(dian)(dian)池(chi)的充放電(dian)(dian)，以傳統方式滿足這樣的需(xu)求會(hui)占(zhan)用不少空間(jian)，同時(shi)增加產品開發時(shi)間(jian)，因此造(zao)就(jiu)了PMIC的出現(xian)。

電源管理ic的主要功用為控制電量流量及流向以配合主系統需要。在多個電源（例如，外部(bu)真流電(dian)(dian)(dian)源(yuan)、電(dian)(dian)(dian)池(chi)(chi)、USB電(dian)(dian)(dian)源(yuan)等(deng)），選取(qu)、分(fen)(fen)配電(dian)(dian)(dian)力給主(zhu)系(xi)統各部(bu)分(fen)(fen)使(shi)用(yong)，例如提供多(duo)個不同(tong)電(dian)(dian)(dian)壓(ya)的(de)電(dian)(dian)(dian)源(yuan)，并負責為(wei)內部(bu)電(dian)(dian)(dian)池(chi)(chi)充電(dian)(dian)(dian)。因為(wei)使(shi)用(yong)的(de)系(xi)統多(duo)以電(dian)(dian)(dian)池(chi)(chi)為(wei)電(dian)(dian)(dian)源(yuan)，其多(duo)使(shi)用(yong)高(gao)轉換效率的(de)設(she)計，以減少功(gong)率損(sun)耗(hao)。

二、電源管理ic損壞什么原因

電(dian)(dian)(dian)(dian)源管(guan)理ic損壞的原因可能是(shi)電(dian)(dian)(dian)(dian)池電(dian)(dian)(dian)(dian)壓過(guo)(guo)(guo)高或過(guo)(guo)(guo)低(di)，或者(zhe)電(dian)(dian)(dian)(dian)池放電(dian)(dian)(dian)(dian)過(guo)(guo)(guo)快，或者(zhe)電(dian)(dian)(dian)(dian)池內部短路，或者(zhe)電(dian)(dian)(dian)(dian)池管(guan)理IC本身的質(zhi)量問題(ti)。

解決方法：

1、檢查電池(chi)電壓(ya)，如果電壓(ya)過(guo)高(gao)或過(guo)低，應該更換電池(chi)。

2、檢查電(dian)池(chi)放電(dian)速度，如(ru)果放電(dian)速度過快，應該更換電(dian)池(chi)。

3、檢查電(dian)池(chi)內部是否有(you)短路，如果(guo)有(you)，應該更換電(dian)池(chi)。

4、檢查電源(yuan)管(guan)(guan)理ic本(ben)身的質量(liang)，如果有問題，應該(gai)更(geng)換電源(yuan)管(guan)(guan)理ic。