LDO稳压器对嵌入式系统掉电保护作用的研究  

Research on effects of LDO regulators on power-down protection of embedded system

作　　者：程万前 阮慧[1,2] 郭少艾 郭月俊 王彪[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所,吉林长春130033 [2]中国科学院大学,北京100049

出　　处：《电源技术》2016年第6期1290-1292,共3页Chinese Journal of Power Sources

基　　金：自然科学基金项目(61306060;61376070;61106047;BK2012188)

摘　　要：针对嵌入式系统掉电保护的问题,对低压差(LDO)线性稳压器对系统掉电保护的作用进行了研究。实验以基于LPC2138的嵌入式系统为例,测试了压降不同的3款稳压器对系统掉电后工作时间的影响。通过分析实验数据,得出结论:低压降的LDO线性稳压器相对普通的稳压器具有显著的优势,系统掉电后,它能够为系统提供更加充足的时间向外部存储设备写入重要信息。Focused on the power fail safeguard in embedded system,the effects of LDO regulators on power-down protection were introduced.The relationship between the LDO regulators and the operating time of system after power down was tested.The experiment was based on LPC2138 system and the difference of operating time after power down was tested when using different regulators.After analyzing the data,the results show that LDO regulators can provide enough time for system to write important data to storage device.

关 键 词：LDO稳压器 掉电保护 嵌入式系统 LPC2138 

分 类 号：TM643[电气工程—电力系统及自动化]