| DC-DC低功耗限流电路的设计 |
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| 引用本文： | 吴春瑜,李德第,尹飞飞,卢雪梅,李佳,管慧.DC-DC低功耗限流电路的设计[J].半导体技术,2009,34(9). |
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| 作者姓名： | 吴春瑜 李德第 尹飞飞 卢雪梅 李佳 管慧 |
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| 作者单位： | 辽宁大学,物理学院,沈阳,110036;杭州鑫芯电子有限公司,杭州,310012 |
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| 基金项目： | 沈阳市技术创新开发研究计划(1053125-1-13) |
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| 摘 要： | 设计了一种用于升压型DC-DC转换器的限流电路,可以防止芯片内部的功率开关管遭受大电流的冲击。该电路把电流流过开关管产生的压降与参考电流流过参考管产生的压降相比较,输出电流限制信号,克服了传统限流电路功耗大等缺陷。还设计了一种低功耗的动态参考电流源,其软启动功能能够减小输出电压的过冲。Spectre仿真结果表明,限流电路有效限制了开关管的最大电流,满足设计要求。
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| 关 键 词： | 限流电路 DC-DC 软启动 低功耗 |
Design of a Low Power DC-DC Current-Limiting Circuit |
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| Wu Chunyu,Li Dedi,Yin Feifei,Lu Xuemei,Li Jia,Guan Hui.Design of a Low Power DC-DC Current-Limiting Circuit[J].Semiconductor Technology,2009,34(9). |
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| Authors: | Wu Chunyu Li Dedi Yin Feifei Lu Xuemei Li Jia Guan Hui |
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| Affiliation: | 1.Department of Physics;Liaoning University;Shenyang 110036;China;2.Hangzhou Goldenchip Electronics Co.;Ltd.;Hangzhou 310012;China |
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| Abstract: | A current-limiting circuit which can prevent the power switch on the chip from being under attack of high-current was designed for boost DC-DC converter. The circuit supplies the current-limiting signal by comparing the voltage drop of switch MOS with the voltage drop of reference MOS. A lossless current reference having changeable current value was also designed. The soft-start circuit can reduce the overshoot of the output voltage. The Spectre simulating result shows that the current-limiting circuit limi... |
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| Keywords: | current-limiting circuit DC-DC soft-start low power |
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