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首页> 外文期刊>Power Electronics, IET >Current-controlled switching regulator using a DC-DC converter with high-step-down voltage gain
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Current-controlled switching regulator using a DC-DC converter with high-step-down voltage gain

机译：使用具有高降压电压增益的DC-DC转换器的电流控制型开关调节器

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摘要

During the last two decades, a great number of applications for DC-DC converters have been reported. New technologies are requiring low voltages. A possible solution to this problem is to use a transformerless high-step-down voltage converter where the conversion ratio depends on an integer number that indicates the number of times the steady-state duty ratio is multiplied by itself to obtain a high-voltage reduction. A controller design methodology is given in this study for such converter using average currentmode control. The proposed controller scheme employs the inductor current of the input stage and the capacitor voltage of the output stage. The advantage of using the selected current is that changes in the input source will have an immediate effect in the controller. The sensed current can also be used for one cycle overload protection; therefore the full benefits of current-mode control are maintained. The resulting switching regulator is able to provide a high-step-down voltage reduction and a regulated output voltage. Experimental results are given for a switching regulator with a voltage reduction from 48 to 1.5 V where the robustness of the proposed controller is tested under changes on the output load.
机译：在过去的二十年中，已经报道了DC-DC转换器的大量应用。新技术需要低电压。解决此问题的一种可能的方法是使用无变压器的高降压转换器，其转换比取决于一个整数，该整数表示稳态占空比自身乘以以获得高电压降低的次数。在这项研究中给出了使用平均电流模式控制的这种转换器的控制器设计方法。所提出的控制器方案使用输入级的电感器电流和输出级的电容器电压。使用选定电流的优点是输入源的变化将立即对控制器产生影响。感测到的电流还可以用于一个周期的过载保护。因此，保持了电流模式控制的全部优势。最终的开关稳压器能够提供高降压电压和稳定的输出电压。给出了将开关稳压器的电压从48V降低至1.5V的实验结果，其中所提出的控制器的鲁棒性在输出负载变化的情况下进行了测试。

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