摘要
为了提高汽车电压调节器在轻载时的效率,设计了一种基于PWM-PSM调制模式的调节器。中载或重载时采用PWM调制模式,轻载时采用PSM调制模式。系统负载的轻重通过检测励磁调整管导通的占空比来判断。基于CSMC 40 V BCD工艺进行流片,测试结果表明,占空比小于25%时采用PSM调制模式,占空比大于或等于25%时采用PWM调制模式。与传统PWM调制模式相比,轻载(励磁电流小于1.1 A)时,该调节器的效率至少提高了23%。
Based on PWM-PSM modulation mode,an automotive voltage regulator was designed to improve the efficiency of the regulator in light load.PWM modulation mode was adopted in medium or heavy load,and PSM modulation mode was adopted in light load.The degree of the system load was estimated by detecting the duty cycle of the high power device.The results of the chip processed in CSMC 40 V BCD techniques showed that PSM modulation mode was adopted when the duty cycle was less than 25%,and PWM modulation mode was adopted when the duty cycle was equal or greater than 25%.At light load(excitation current was less than 1.1 A),the efficiency of the regulator increased by at least 23%compared with that of the traditional PWM modulation mode.
作者
王建卫
李佐
陈玉霞
何颖子
WANG Jianwei;LI Zuo;CHEN Yuxia;HE Yingzi(Guizhou University of Engineering Science,Bijie,Guizhou551700,P.R.China)
出处
《微电子学》
CAS
北大核心
2019年第2期237-241,共5页
Microelectronics
基金
2017年国家级大学生创新创业训练计划项目(201710668076)
贵州省科学技术厅
毕节市科学技术局
贵州工程应用技术学院科学技术联合基金资助项目(黔科合LH字[2014]7525号)
关键词
脉冲宽度调制
脉冲跨周期调制
电压调节器
效率
pulse width modulation
pulse skipping modulation
voltage regulator
efficiency
