一种用于DC-DC变换器中的斜坡补偿电路  

A Slope Compensation Circuit for DC-DC Converter

作　　者：师翔 张在涌 赵永瑞 谭小燕[1,3] 邓嘉霖 史亚盼 Shi Xiang;Zhang Zaiyong;Zhao Yongrui;Tan Xiaoyan;Deng Jialin;Shi Yapan(North-China Integrated Circuit Co.,Ltd.,Shijiazhuang 050200,China;The 13^(th)Research Institute,CETC,Shijiazhuang 050051,China;Hebei Key Laboratory of Radio Frequency Integrated Circuit for Mobile Communication,Shijiazhuang 050200,China)

机构地区：[1]河北新华北集成电路有限公司,石家庄050200 [2]中国电子科技集团公司第十三研究所,石家庄050051 [3]河北省移动通信用射频集成电路重点实验室,石家庄050200

出　　处：《半导体技术》2021年第5期349-353,共5页Semiconductor Technology

摘　　要：设计了一种应用于DC-DC变换器中的斜坡补偿电路。提出了一种新的动态斜坡补偿方法,使斜坡补偿电流的斜率随着占空比的增大而增大,在消除了次谐波振荡的同时,也避免了斜坡补偿对DC-DC变换器带载能力的影响。该斜坡补偿电路结构简单,易于实现,已在基于0.5μm双极型CMOS DMOS (BCD)工艺设计的电流模降压型DC-DC变换器中得到了验证。测试结果表明,该DC-DC变换器在不同占空比下可稳定工作,可以满足一般的电源应用需求。设计的DC-DC变换器面积为2.2 mm×2.2 mm,其中斜坡补偿电路面积仅为0.2 mm×0.3 mm。A slope compensation circuit for DC-DC converter was designed.A new dynamic slope compensation method was proposed, which made the slope of the slope compensation current increase with the increase of duty cycle.It eliminated the sub-harmonic oscillation and avoided the influence of slope compensation on the load capacity of the DC-DC converter.The slope compensation circuit is simple in structure and easy to implement.It has been verified in the current mode buck DC-DC converter based on 0.5 μm bipolar CMOS DMOS(BCD) process.The test results show that the DC-DC converter can work stably under different duty cycles, and it can meet the needs of general power supply applications.The area of the designed DC-DC converter is 2.2 mm×2.2 mm, and the area of the slope compensation circuit is only 0.2 mm×0.3 mm.

关 键 词：DC-DC变换器 斜坡补偿电路 次谐波振荡 带载能力 双极型CMOS DMOS(BCD)工艺 

分 类 号：TN433[电子电信—微电子学与固体电子学]