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首页> 外文期刊>IEEE Transactions on Industrial Electronics >An Improved Optimum-Damping Current-Mode Buck Converter With Fast-Transient Response and Small-Transient Voltage Using New Current Sensing Circuits
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An Improved Optimum-Damping Current-Mode Buck Converter With Fast-Transient Response and Small-Transient Voltage Using New Current Sensing Circuits

机译：一种改进的最佳阻尼电流模式降压转换器，具有快速瞬态响应和使用新电流检测电路的小瞬态电压

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摘要

This article presents an improved optimum damping current-mode buck converter with fast-transient response and small-transient voltage using new current sensing circuits. The improved optimum-damping circuit, consisting of the dynamic slope generator and the proposed rail-to-rail current sensor, can stabilize the converter during the output current change and can accelerate the transient response to achieve better figure of merit performance. The dynamic slope generator can compensate the slope to prevent subharmonic oscillation issue and lower undershoot/overshoot without an extra slope compensator. The proposed rail-to-rail current sensor increases the input voltage range, accurately captures the inductor current information, and accelerates the transient response as the load current changes, because it eliminates spikes without the need for a sample-and-hold circuit in a conventional current-sensing circuit. The contributions of the proposed converter are listed in the following: 1) we have proposed a new current-sensing circuit without voltage divider, which can be operated rail-to-rail and improve the dynamic response; 2) the new current-sensing circuit consisted of no switches and therefore, without switching noises; 3) the new current-sensing circuit without voltage divider has a smaller chip area and a smaller path delay; 4) the proposed current-sensing circuit needs no sample-and-hold circuits to reduce current spikes; 5) the transient response and transient voltage of the proposed converter are better than others' works; and 6) we have designed and implemented a new optimum-damping current-mode buck converter with better performances compared with previous publications.
机译：本文介绍了一种改进的最佳阻尼电流模式降压转换器，使用新电流检测电路具有快速瞬态响应和小瞬态电压。由动态斜坡发生器和所提出的轨到轨电流传感器组成的改进的最佳阻尼电路可以在输出电流变化期间稳定转换器，并可以加速瞬态响应，以实现更好的优异性能。动态斜率发生器可以补偿斜率以防止次谐波振荡问题和下发下的下冲/过冲而无需额外的斜率补偿器。所提出的轨到轨电流传感器增加了输入电压范围，准确地捕获电感器电流信息，并随着负载电流的变化加速瞬态响应，因为它消除了尖峰，而无需采样和保持电路传统电流传感电路。所提出的转换器的贡献如下所示：1）我们提出了一种新的电流传感电路，没有分压器，可以是轨道导轨的，并提高动态响应; 2）新电流传感电路由没有开关组成，因此没有切换噪声; 3）没有分压器的新电流传感电路具有较小的芯片区域和较小的路径延迟; 4）所提出的电流传感电路不需要采样隔离电路来减少电流尖峰; 5）所提出的转换器的瞬态响应和瞬态电压比其他的作品更好; 6）我们设计并实现了一种新的最佳阻尼电流模式降压转换器，与先前的出版物相比具有更好的性能。

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