[1]常昌远,谭春玲,姚建楠,等.全负载下实现高效率的DC-DC转换器芯片设计[J].东南大学学报(自然科学版),2007,37(1):22-25.[doi:10.3969/j.issn.1001-0505.2007.01.006]
 Chang Changyuan,Tan Chunling,Yao Jiannan,et al.Design of high-efficiency DC-DC converter with full load[J].Journal of Southeast University (Natural Science Edition),2007,37(1):22-25.[doi:10.3969/j.issn.1001-0505.2007.01.006]
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全负载下实现高效率的DC-DC转换器芯片设计()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
37
期数:
2007年第1期
页码:
22-25
栏目:
电子科学与工程
出版日期:
2007-01-20

文章信息/Info

Title:
Design of high-efficiency DC-DC converter with full load
作者:
常昌远 谭春玲 姚建楠 邹一照 魏同立
东南大学集成电路学院,南京 210096
Author(s):
Chang Changyuan Tan Chunling Yao Jiannan Zou Yizhao Wei Tongli
College of Integrated Circuit, Southeast University, Nanjing 210096,China
关键词:
脉冲宽度调制 脉冲频率调制 PWM/PFM 自动切换 DC-DC转换器 全载效率
Keywords:
pulse width modulation pulse frequency modulation PWM/PFM automatic switching DC-DC converter efficiency with full load
分类号:
TN710
DOI:
10.3969/j.issn.1001-0505.2007.01.006
摘要:
首先讨论了DC-DC转换器的功率损耗源,根据重载情况下PWM控制效率高而轻载情况下PFM控制效率高的特点,提出了全负载下实现PWM/PFM自动切换以降低功耗、提高电源效率的控制方法.将相加模式PWM、跳周期和限流相结合的PFM整合于一个系统中,使整个系统高效协调地工作,并在较大的负载变化范围内均具有高效率的优点.系统采用0.5 μm CMOS工艺实现,对系统的仿真结果表明,系统正常工作,成功实现了PWM/PFM的自动切换,性能指标达到了设计要求.
Abstract:
The sources of power dissipation of DC-DC converter are discussed firstly. The control methods of DC-DC converter such as pulse width modulation(PWM), pulse frequency modulation(PFM)and PWM/PFM hybrid control are analyzed together with their power efficiency. The result shows that PWM is of high efficiency with heavy load and PFM is of high efficiency with light load. So PWM/PFM automatic switching DC-DC converter is proposed to lower the power loss and improve the power efficiency. The switching is according to the variation of the load. The proposed system integrates summing mode PWM, skipping cycles and current limited PFM into one system. It makes the whole system work efficiently over a wide load variation. The whole system are designed, simulated and debugged with 0.5 μm complementary metal-oxide-semiconductor transistor(CMOS)process. The simulation results show that the system can work properly, and PWM/PFM automatic switching is achieved successfully. Its performance meets the design requirements.

参考文献/References:

[1] Mulligan M D,Broach B.A constant-frequency method for improving light-load efficiency in synchronous buck converters[J]. IEEE Power Electronics Letters,2005,3(1):24-29.
[2] 王海永,李永明,陈宏毅.便携式电子系统的DC/DC开关电源系统结构设计和研究[J].固体电子学研究与进展,2002,22(2):164-169.
  Wang Haiyong,Li Yongming,Chen Hongyi.System architecture design and research of a DC-DC switch mode power supply for portable electronics system[J].Research & Progress of SSE,2002,22(2):164-169.(in Chinese)
[3] Sahu B,Rincon-Mora G A.A low voltage,dynamic,noninverting,synchronous buck-boost converter for portable applications[J].IEEE Trans Power Electron,2004,19(3):748-756.
[4] Choi Jin-ho,Huh Dong-young,Kim Young-seok.The improved burst mode in the stand-by operation of power supply[C] //Applied Power Electronics Conference and Exposition.Anaheim,CA,USA,2004:426-432.
[5] Stratakos Anthony John.High-efficiency low-voltage DC-DC conversion for portable applications[D]:Berkeley:University of California,2001.
[6] Sun J,Mitchevl D M,Bass P M.Averaged modeling of PWM converters operating in discontinuous conduction mode[J].IEEE Trans Power Electron,2001,16(7):482-492.
[7] Harry J Bittner,Santa Clara.Voltage regulator that operates in either PWM or PFM mode:United States,US005568044A [P].1996-10-22.
[8] Forsyth A,Mollov S.Modeling control of DC-DC converters[J].IEE Power Engineering Journal,1998,12(25):229-236.
[9] Lee C F,Mod P K T.A monolithic current-mode CMOS DC-DC converter with on-chip current-sensing technique[J].IEEE J Solid-State Circuits,2002,37(4):526-530.
[10] Arbetter B,Erickson R,Maksimovic D.DC-DC converter design for battery-operated systems[C] //IEEE Power Electronics Specialists Conf.Anaheim,CA,USA,1995:103-106.

备注/Memo

备注/Memo:
作者简介: 常昌远(1961—),男,博士,副教授,ccyycc@seu.edu.cn.
更新日期/Last Update: 2007-01-20