一、電源管理ic是干什么用的

PMIC（Power Management IC）又稱電源管理ic，是(shi)一種(zhong)特定用途的集成(cheng)電(dian)路，其功能(neng)是(shi)為(wei)主(zhu)系統(tong)作管理(li)電(dian)源等工(gong)作。

PMIC常用(yong)于(yu)以電(dian)(dian)(dian)池作為電(dian)(dian)(dian)源的(de)裝置，例如移動電(dian)(dian)(dian)話(hua)或便攜式媒體播放器。由(you)于(yu)這(zhe)類裝置一般有多于(yu)一個電(dian)(dian)(dian)源（例如電(dian)(dian)(dian)池及USB電(dian)(dian)(dian)源），系統又需(xu)要多個不同電(dian)(dian)(dian)壓的(de)電(dian)(dian)(dian)源，加上要控制電(dian)(dian)(dian)池的(de)充放電(dian)(dian)(dian)，以傳(chuan)統方(fang)式滿足(zu)這(zhe)樣的(de)需(xu)求會(hui)占用(yong)不少空間，同時增加產品開發(fa)時間，因此造(zao)就(jiu)了PMIC的(de)出現。

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(li)如，外部真流電(dian)(dian)(dian)(dian)源(yuan)(yuan)、電(dian)(dian)(dian)(dian)池(chi)(chi)、USB電(dian)(dian)(dian)(dian)源(yuan)(yuan)等），選取、分配(pei)電(dian)(dian)(dian)(dian)力給主系統(tong)各部分使(shi)用(yong)，例(li)如提供(gong)多(duo)個不同電(dian)(dian)(dian)(dian)壓(ya)的電(dian)(dian)(dian)(dian)源(yuan)(yuan)，并(bing)負(fu)責(ze)為內部電(dian)(dian)(dian)(dian)池(chi)(chi)充(chong)電(dian)(dian)(dian)(dian)。因(yin)為使(shi)用(yong)的系統(tong)多(duo)以電(dian)(dian)(dian)(dian)池(chi)(chi)為電(dian)(dian)(dian)(dian)源(yuan)(yuan)，其多(duo)使(shi)用(yong)高(gao)轉換(huan)效率的設(she)計(ji)，以減(jian)少(shao)功(gong)率損(sun)耗。

二、電源管理ic損壞什么原因

電(dian)源(yuan)管(guan)理ic損壞的原因可能是電(dian)池(chi)(chi)電(dian)壓(ya)過高或過低，或者電(dian)池(chi)(chi)放電(dian)過快，或者電(dian)池(chi)(chi)內部短路，或者電(dian)池(chi)(chi)管(guan)理IC本身的質量(liang)問題(ti)。

解決方法：

1、檢查電(dian)池(chi)電(dian)壓，如果電(dian)壓過高(gao)或過低，應該更換電(dian)池(chi)。

2、檢查電(dian)池放(fang)電(dian)速(su)度，如(ru)果放(fang)電(dian)速(su)度過(guo)快(kuai)，應該(gai)更換電(dian)池。

3、檢查電池(chi)內部(bu)是否有短路，如果(guo)有，應該更換電池(chi)。

4、檢查電源管(guan)理ic本身的質量，如果有(you)問題，應該(gai)更換(huan)電源管(guan)理ic。