[1]常昌远,陈瑶,李俊,等.基于双频PFM控制模式的升压式DC-DC变换器[J].东南大学学报(自然科学版),2013,43(4):701-705.[doi:10.3969/j.issn.1001-0505.2013.04.006]
　Chang Changyuan,Chen Yao,Li Jun,et al.Boost DC-DC converter based on bi-frequency PFM control mode[J].Journal of Southeast University (Natural Science Edition),2013,43(4):701-705.[doi:10.3969/j.issn.1001-0505.2013.04.006]
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基于双频PFM控制模式的升压式DC-DC变换器()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
43
期数:
2013年第4期
页码:
701-705
栏目:
电路与系统
出版日期:
2013-07-20

文章信息/Info

Title:
Boost DC-DC converter based on bi-frequency PFM control mode
作者:
常昌远; 陈瑶; 李俊; 朱铭强
东南大学集成电路学院, 南京210096
Author(s):
Chang Changyuan;  Chen Yao;  Li Jun;  Zhu Mingqiang
School of Integrated Circuit, Southeast University, Nanjing 210096, China
关键词:
双频PFM;  升压式DC-DC变换器;  全载效率;  EMI
Keywords:
bi-frequency PFM(pulse frequency modulation);  boost DC-DC converter;  full load efficiency;  EMI(electro magnetic interference)
分类号:
TN4
DOI:
10.3969/j.issn.1001-0505.2013.04.006
摘要:
为了改善系统在宽负载范围内的整体效率,设计了一种基于双频脉冲频率调制(PFM)控制模式的升压式DC-DC变换器.首先,选定2个固定的频率.通过检测负载的变化,使得变换器在轻载或重载时工作于其中的1个频率下,而中载时则通过选择2个频率的不同组合来稳定输出电压,提高全载效率.继而设计了一个双频振荡器电路模块.整个芯片设计基于0.5 μm CMOS工艺,并在Cadence工具中完成模拟仿真和版图设计.流片芯片测试结果表明,系统在整个负载范围内的转换效率高于75%,最大输出电流可达300 mA,芯片的实际性能达到设计要求.因此,采用这种控制方法能有效提高系统的全载效率,所得变换器可望具有良好的电磁干扰特性.
Abstract:
In order to improve the systems whole efficiency in a wide load range, a boost DC-DC converter based on the bi-frequency PFM(pulse frequency modulation)control mode is designed. First, two fixed frequencies are chosen. Then, by detecting load changes, the converter works at a single frequency when the system is under light load or heavy load; however, at medium load, the converter chooses different combinations of these two frequencies to stabilize the output voltage, improving full-load efficiency obviously. Subsequently, a bifrequency-oscillator is designed. The chip is designed based on 0.5 μm CMOS process. The simulation and layout design is completed in Cadence tools. The test results of the chip show that the full load conversion efficiency is above 75%, and the maximum output current is up to 300 mA. Therefore, the actual performance of the chip meets the design requirements. The bi-frequency PFM control mode can effectively improve the systems full-load efficiency, and the converter may have well EMI(electro magnetic interference)characteristics.

参考文献/References:

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备注/Memo

备注/Memo:
作者简介: 常昌远(1961—),男,博士,副教授, ccyycc@seu.edu.cn.
基金项目: 国家自然科学基金资助项目(61274022).
引文格式: 常昌远,陈瑶,李俊,等.基于双频PFM控制模式的升压式DC-DC变换器［J］.东南大学学报:自然科学版,2013,43(4):701-705. ［doi:10.3969/j.issn.1001-0505.2013.04.006］
更新日期/Last Update: 2013-07-20