Analysis of Double Step-Down Two-Phase Buck Converter for VRM
Analysis of Double Step-Down Two-Phase Buck Converter for VRM
复制标题
VRM双降压两相Buck变换器分析
DOI：
--
复制
发表时间：
2005
期刊：
影响因子：
--
通讯作者：
T. Sato
中科院分区：
文献类型：
--
作者：
K. Nishijima;K. Harada;T. Nakano;T. Nabeshima;T. Sato
提出了一种适用于微处理器电源的新型两相降压变换器。与传统的两相Buck变换器相比，该变换器实质上具有Eo/Ei = D/2的双降压比，并通过降低开关元件的开关损耗实现了高效率。此外，输出平滑电容的电流涟漪被改善到与传统的四相降压变换器相同的值。此外，在每个相位中的两个电感器之间的电流不平衡被自动去除，而不需要任何电流感测装置。上述优良的特性是简单地实现了一个额外的电容器
A novel two-phase buck converter suitable to apply the power supplies for MPU is proposed. Compared to conventional two-phase buck converter, the proposed converter essentially has double step-down ratio as Eo/Ei = D/2 and high efficiency is realized by reducing the switching loss of the switching elements. In addition the current ripple of the output smoothing capacitor is improved to the same value as that of conventional four-phase buck converter. Moreover the current unbalance between two inductors in each phase is removed automatically without any current sensing means. The above fine characteristics are simply achieved an additional capacitor