| 一种提高DC-DC瞬态响应的误差放大器设计 |
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| 引用本文： | 许崇为,杨令,韩志超,刘跃智.一种提高DC-DC瞬态响应的误差放大器设计[J].电子科技,2014,27(9):109-111. |
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| 作者姓名： | 许崇为 杨令 韩志超 刘跃智 |
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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) |
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| 摘 要： | 设计了一种可提高DC-DC瞬态响应的误差放大器,其输出阻抗和补偿电阻随着负载电流的变化动态调整,使系统在不同的负载条件下能够获取足够的相位裕度。同时,设计了采样电路和逻辑选择电路,分别用于检测负载电流变化和选择开关导通。结果显示,采用文中所提出结构,DC-DC的过冲比原来减小了50%。
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| 关 键 词： | 误差放大器 瞬态响应 输出阻抗 动态调整 |
Design of an Error Amplifier for Improving Transient Response of DC-DC Converter |
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| XU Chongwei,YANG Ling,HAN Zhichao,LIU Yuezhi.Design of an Error Amplifier for Improving Transient Response of DC-DC Converter[J].Electronic Science and Technology,2014,27(9):109-111. |
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| Authors: | XU Chongwei YANG Ling HAN Zhichao LIU Yuezhi |
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| Affiliation: | (Institute of Electronic CAD,Xidian University,Xi'an 710071,China) |
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| Abstract: | A novel error amplifier is presented to improve the transient response of DC-DC converter. The output impedance and compensation resistors of the error amplifier are dynamically adjusted according to different load conditions for the system to achieve enough phase margins. A current sensing circuit and a logic choice circuit are designed to derive load change and choose the switch to turn on. The test results show that the DC-DC converter with the proposed structure reduces the overshoot by 50%. |
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| Keywords: | error amplifier transient response output impedance dynamically adjust |
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