| 一种PWM/伪PFM双模调制的降压型DC/DC开关电源 |
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| 引用本文： | 刘帘曦,杨银堂,朱樟明. 一种PWM/伪PFM双模调制的降压型DC/DC开关电源[J]. 半导体学报, 2008, 29(10): 1956-1962 |
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| 作者姓名： | 刘帘曦 杨银堂 朱樟明 |
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| 作者单位： | 西安电子科技大学微电子学院,宽禁带半导体材料与器件教育部重点实验室,西安,710071 |
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| 基金项目： | 国家自然科学基金，高等学校博士学科点专项科研项目，国家自然科学基金 |
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| 摘 要： | 利用根据负载电流的大小变换调制模式的方法实现了一种降压型高转换效率的DC/DC开关电源.当控制电压占空比小于20%时,采用伪PFM(pseudo-pulse-frequency modulation)模式调制;占空比大于20%时,采用PWM(pulse-width modulation)模式调制,平均转换效率约为90%,输出电流范围为0.01～3.0A.控制芯片采用0.5μm DPDM CMOS工艺制造,并采用二次集成的方式在封装内部集成了功率p-MOSFET.
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| 关 键 词： | 脉宽调制 伪频宽调制 占空比 二次集成 |
| 收稿时间： | 2015-08-18 |
| 修稿时间： | 2008-06-19 |
A PWM/Pseudo-PFM Auto-Mode-Applied Buck DC/DC Switching Regulator |
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| Liu Lianxi, Yang Yintang, Zhu Zhangming. A PWM/Pseudo-PFM Auto-Mode-Applied Buck DC/DC Switching Regulator[J]. Journal of Semiconductors, 2008, In Press. Liu L X, Yang Y T, Zhu Z M. A PWM/Pseudo-PFM Auto-Mode-Applied Buck DC/DC Switching Regulator[J]. J. Semicond., 2008, 29(10): 1956.Export: BibTex EndNote |
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| Authors: | Liu Lianxi Yang Yintang Zhu Zhangming |
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| Affiliation: | Key Laboratory of Wide Band-Gap Semiconductor Materials and Devices of the Ministry of Education, Institute of Microelectronics,Xidian University,Xi'an 710071,China;Key Laboratory of Wide Band-Gap Semiconductor Materials and Devices of the Ministry of Education, Institute of Microelectronics,Xidian University,Xi'an 710071,China;Key Laboratory of Wide Band-Gap Semiconductor Materials and Devices of the Ministry of Education, Institute of Microelectronics,Xidian University,Xi'an 710071,China |
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| Abstract: | A buck DC/DC switching regulator is implemented by automatically altering the modulation mode according to the load current that ranges from 0.01 to 3A. The pseudo-PFM mode is applied when duty cycle is less than 20% ,and the PWM mode is selected in a range of duty cycle from 20% to 100%. The average conversion efficiency of the regulator is about 90% when the output current varies. The proposed dual-mode-control die is implemented in a 0.5μm DPDM CMOS mixed-signal process and a power p-MOSFET is used in the chip by hybrid integration. |
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| Keywords: | pulse-width-modulation pseudo-pulse-frequency-modulation duty cycle hybrid integrated |
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