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电子学报  2013 

超快速加载Buck变换器设计

DOI: 10.3969/j.issn.0372-2112.2013.08.023, PP. 1598-1602

Keywords: 电压调节模块,最优负载瞬态特性,双输入Buck变换器,加载阈值

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Abstract:

为了提高VRM的加载响应速度,该文分析了传统Buck变换器的最优加载过程,并基于传统Buck变换器提出了双输入Buck变换器电路方案,说明了其稳态工作过程和加载运行过程,以最优加载阈值为依据给出了附加电源的切换条件,并做了仿真对比研究.仿真和试验结果表明双输入Buck变换器较传统Buck变换器具有更快加载响应速度和更小输出电压跌落,且结构简单,易于设计和实现,适用于VRM主电路.

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