| 提高峰值电流模DC/DC带载能力的限流设计 |
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| 引用本文： | 代国定,胡波,马晓辉,陈跃. 提高峰值电流模DC/DC带载能力的限流设计[J]. 华中科技大学学报(自然科学版), 2011, 0(4): 29-32 |
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| 作者姓名： | 代国定 胡波 马晓辉 陈跃 |
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| 作者单位： | 西安电子科技大学电路CAD研究所;西安电子科技大学超高速电路设计与电磁兼容教育部重点实验室; |
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| 基金项目： | 国家部委预研基金资助项目(9140A08010208DZ0123) |
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| 摘 要： | 提出了一种新颖的提高峰值电流模DC/DC带载能力的限流设计,将斜坡补偿的采样电流放大信号与斜坡补偿的正温度系数电压信号相比较,代替传统的固定电压限流,消除斜坡补偿对带载能力的影响,并对采样结构的正温度特性进行温度补偿,提高了DC/DC转换器带载能力.该电路基于TSMC的0.25μm BCD工艺设计,投片测试结果表明:占空比在10%～80%变化时,电感电流最大值相对变化量小于5%;温度在-40～120℃变化时,电感电流最大值相对变化量小于6.5%.
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| 关 键 词： | DC/DC转换器 斜坡补偿 带载能力 峰值电流模 限流比较器 温度补偿 |
Design of peak current limitation for improving load ability in peak current mode DC/DC converters |
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| Dai Guodinga,b Hu Boa Ma Xiaohuia Chen Yuea. Design of peak current limitation for improving load ability in peak current mode DC/DC converters[J]. JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE, 2011, 0(4): 29-32 |
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| Authors: | Dai Guodinga b Hu Boa Ma Xiaohuia Chen Yuea |
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| Affiliation: | a(a Institute of Electronic CAD;b Key Lab of High-speed Circuit Design and EMC, Ministry of Education,Xidian University,Xi′an 710071,China) |
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| Abstract: | A novel design of peak current limitation for improving load ability in peak current mode direct current/direct current(DC/DC) converters was presented.The amplified signal of the sense current with slope compensation was compared with a positive temperature coefficient voltage with the same slope compensation to eliminate the conventional fixed voltage current limit,which reduced the slope compensation effect on the load ability and made a temperature compensation for the current sense structure.Thus,the l... |
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| Keywords: | DC/DC converter slope compensation load ability peak current mode current limit comparator temperature compensation |
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