摘要
针对传统模拟控制Buck DC-DC难以实现高度集成和转换效率较低的问题,提出一款易于高度集成的数字Buck DC-DC。通过对传统模拟控制环路的研究,得出环路在频域下补偿网络的传输函数,传输函数通过双线性离散化实现频域到z域的转换,实现补偿函数离散化,最后通过z域逆变换为电路形式,完成电路数字化设计。在CSMC 0.25BCD高压工艺库下完成了电路的设计。仿真验证结果表明,输出电压线性调整率为0.21%,输出负载调整率为6%,转换效率为88%~91.8%。
Aiming at the problems of traditional analog control Buck DC-DC that are difficult to achieve high integration and low conversion efficiency,a digital Buck DC-DC is proposed that is easy to highly integrate.Through the study of the traditional analog control loop,the transfer function of the loop compensation network in the frequency domain is obtained.The transfer function realizes the conversion from the frequency domain to the z domain through bilinear discretization,realizes the discretization of the compensation function,and the digital circuit design is completed by z domain inverse transformation into circuit form.The circuit design was completed under the CSMC 0.25BCD high voltage process library.The simulation verification results show that the output voltage linear adjustment rate is 0.21%,the output load adjustment rate is 6%,and the conversion efficiency is 88%~91.8%.
作者
赵鹏
ZHAO Peng(School of Information Engineering,Yulin University,Yulin 719000,China)
出处
《电子设计工程》
2022年第23期75-80,共6页
Electronic Design Engineering
基金
陕西省教育厅科学研究计划项目(21JK1006)。
关键词
DC-DC
传输函数
转换效率
双线性离散化
DC-DC
transfer function
conversion efficiency
bilinear discretization
