电子器件2017，Vol.40Issue(2)：366-369,4.DOI:10.3969/j.issn.1005-9490.2017.02.021
低功耗同步BUCK芯片的过零检测电路
A Zero-Crossing Detection Circuit for BUCK Chip
摘要
Abstract
Under the light load mode,traditional zero crossing detection circuit will produce"current backflow"phenomenon,in order to obtain better performance of switching power supply converter,a zero crossing detection circuit of low power synchronous buck chip is design.Firstly,threshold voltage acquisition and temperature compensation are used to improve amplification circuit stability,and greatly reduce probability of"current backflow"phenomenon,and secondly,edge occult circuit is used to avoid false triggering operation of switching circuit,lastly,the simulation experiments is carried out to test and analyze the performance.The results show that when the temperature is set between-40 ℃~120 ℃,the negative threshold is 0.1 mV,the proposed zero crossing detection circuit can improve the detection accuracy of system,and the system power consumption is very low,it has high practical value.关键词
轻载模式/BUCK芯片/检测电路/温度补偿Key words
light load mode/BUCK chip/detection circuit/temperature compensation分类
信息技术与安全科学引用本文复制引用
杨俊成,李淑霞..低功耗同步BUCK芯片的过零检测电路[J].电子器件,2017,40(2):366-369,4.基金项目
河南省科技攻关计划项目(142102210557) （142102210557）
