| 一种新型低电压极限电流检测电路 |
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| 引用本文： | 许小丽,冯全源.一种新型低电压极限电流检测电路[J].微电子学,2010,40(2). |
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| 作者姓名： | 许小丽 冯全源 |
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| 作者单位： | 西南交通大学,微电子研究所,成都,610031 |
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| 基金项目： | 国家自然科学基金—中物院联合基金资助项目(10876029) |
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| 摘 要： | 为磁滞电流控制的DC-DC开关稳压器设计了一种新型的极限电流检测器。该电路不借助于专门的电流检测电路,只使用一个检测MOSFET和一个电压比较器来实现极限电流检测,减小了电路的复杂度。针对电流检测器的要求,设计了一种低电源电压、高共模电压的比较器。使用TSMC 0.18μm CMOS混合信号工艺,对电路进行设计。结果表明,电路具有很好的容差特性,并且电路可工作在1.2 V的低电源电压下。
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| 关 键 词： | 极限电流比较器 电流检测电路 DC-DC开关稳压器 |
A Novel Low-Voltage Current Limit Detection Circuit |
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| XU Xiaoli,FENG Quanyuan.A Novel Low-Voltage Current Limit Detection Circuit[J].Microelectronics,2010,40(2). |
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| Authors: | XU Xiaoli FENG Quanyuan |
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| Affiliation: | Microelectronics Institute/a>;Southwest Jiaotong University/a>;Chengdu 610031/a>;P.R.China |
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| Abstract: | A novel current limit detector was designed for DC-DC switching voltage regulators. In this circuit, limit current was detected only by using a sensing MOSFET and a voltage comparator, which reduced the circuit complexity. A comparator featuring low power supply voltage and high common-mode voltage was designed to meet the requirements of the current-limited detector. The circuit was designed in TSMC's 0.18 μm CMOS mixed-signal technology. It has been demonstrated that the circuit operates properly at 1.2 V supply voltage and it has a good tolerance. |
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| Keywords: | Current-limited comparator Current limit detection circuit DC-DC switching regulator |
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