| 一款用于电源芯片的过压保护电路设计 |
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| 引用本文： | 陶晓冰,来新泉,赵涛.一款用于电源芯片的过压保护电路设计[J].电源学报,2008,6(1):61-64. |
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| 作者姓名： | 陶晓冰 来新泉 赵涛 |
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| 作者单位： | 西安电子科技大学电路CAD研究所，陕西 西安 710071;西安电子科技大学电路CAD研究所，陕西 西安 710071;西安电子科技大学电路CAD研究所，陕西 西安 710071 |
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| 摘 要： | 本文设计了一款在动态和静态下均可实现过压保护的电路。该电路通过采样反馈，将得到的过电流信号转换成过电压信号，再与过压门限比较之后获得过压保护信号。由于过压比较设置了高低两个门限，因而引入了迟滞，可防止由于过电压在门限附近振荡造成电路频繁开关而不能正常工作。SPICE仿真表明，该电路具有良好的过压保护特性。
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| 关 键 词： | 过压保护 迟滞 反馈 |
| 收稿时间： | 2007/12/3 0:00:00 |
An OVP Circuit Applied in Power Chips |
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| Tao Xiaobing,Lai Xinquan and Zhao Tao.An OVP Circuit Applied in Power Chips[J].Journal of power supply,2008,6(1):61-64. |
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| Authors: | Tao Xiaobing Lai Xinquan and Zhao Tao |
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| Abstract: | An Over-Voltage-Protect (OVP) circuit is presented in the paper that can work in both dynamic and quiescent states. By means of samples and feedbacks, the sampled current is changed into an over-voltage signal, which will be compared with the threshold of OVP comparator to obtain the OVP signal. The hysteresis, which protects the circuit from being switched frequently, is also introduced for the existence of the high and low thresholds of the comparator. By SPICE simulations, a good performance of OVP is given. |
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| Keywords: | OVP hysteresis feedback |
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