| AC/DC开关电源脉宽调制芯片的低功耗设计 |
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| 引用本文： | 田锦明,王松林,来新泉,王留杰. AC/DC开关电源脉宽调制芯片的低功耗设计[J]. 电子科技, 2006, 0(6): 7-10 |
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| 作者姓名： | 田锦明 王松林 来新泉 王留杰 |
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| 作者单位： | 西安电子科技大学CAD研究所,陕西,西安,710071;西安电子科技大学CAD研究所,陕西,西安,710071;西安电子科技大学CAD研究所,陕西,西安,710071;西安电子科技大学CAD研究所,陕西,西安,710071 |
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| 摘 要： | 基于AC/DC开关电源PWM控制芯片的工作原理,分析了其产生功耗的主要来源,提出了两种减小芯片功耗的方法,一是采用电流源和电流沉串联方式构成的输出驱动电路,通过消除CMOS电路的瞬态短路导通现象,降低该电路模块的功耗;二是采用跳周工作模式,使芯片在轻载和空载情况下,降低功率开关管的开关损耗.
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| 关 键 词： | 交流/直流(AC/DC) 开关电源 低功耗 跳周模式 |
| 收稿时间： | 2005-10-17 |
| 修稿时间： | 2005-10-17 |
Low Power Dissipation Design of AC/DC Switched Mode Power Controller |
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| Tian Jinming,Wang Songlin,Lai Xinquan,Wang Liujie. Low Power Dissipation Design of AC/DC Switched Mode Power Controller[J]. Electronic Science and Technology, 2006, 0(6): 7-10 |
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| Authors: | Tian Jinming Wang Songlin Lai Xinquan Wang Liujie |
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| Abstract: | This paper analyses the main causes of power dissipation and presents two methods for decreasing the power dissipation of the circuit based on the operation principle of AC/DC switched mode power controller. One method is to adopt the output driver composed of the current source and current sink in series, which reduces the power dissipation in this module by eliminating the transient short current existing in the CMOS unit. The other method is to employ the skip cycle mode, which reduces switching dissipation of the power MOSFET and provides improved efficiency at light loads or empty, |
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| Keywords: | AC/DC switched mode power supply low power dissipation skipping cycle mode |
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