上海交通大学学报(自然版) ›› 2017, Vol. 51 ›› Issue (6): 658-664.
胡佳俊,陈后鹏,王倩,李喜,苗杰,雷宇,宋志棠
出版日期:
2017-06-30
发布日期:
2017-06-30
基金资助:
HU Jiajun,CHEN Houpeng,WANG Qian,LI Xi,MIAO Jie,LEI Yu,SONG Zhitang
Online:
2017-06-30
Published:
2017-06-30
Supported by:
摘要: 分析了传统升压式DCDC转换器在全负载范围内实现高电源转换效率的局限性,在此基础上,提出了一种轻载检测和自适应变频机制.该技术无需额外的芯片管脚和器件,即能使转换器在电感电流断续模式下精确检测出负载状况.将所设计的升压式DCDC转换器在CZ6H 0.35 μm标准CMOS工艺条件下进行仿真.结果表明,当负载电流发生变化时,转换器能够根据负载检测值的大小自适应地进行跳频变换.在负载电流为1 mA的条件下,电源转换效率达到82%.系统环路能够在全负载范围内保持良好的稳定性,当负载电流以1.5μA/20μs跳变时,最大下冲和上冲电压分别为300和200 mV,恢复时间分别只需80和60 μs,版图面积约为1.26 mm2.
中图分类号:
胡佳俊,陈后鹏,王倩,李喜,苗杰,雷宇,宋志棠. 带轻载变频模式的升压式DCDC转换器设计[J]. 上海交通大学学报(自然版), 2017, 51(6): 658-664.
HU Jiajun,CHEN Houpeng,WANG Qian,LI Xi,MIAO Jie,LEI Yu,SONG Zhitang. Design of Boost DCDC Converter with
Frequency Hopping at Light Load[J]. Journal of Shanghai Jiaotong University, 2017, 51(6): 658-664.
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