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Two-step ripple-free multi-phase buck converter and method thereof

机译:两步无脉动多相降压转换器及其方法

摘要

A two-step ripple-free multi-phase buck converter and method thereof comprises a first-stage voltage regulator to convert an input voltage to an intermediate voltage and a second-stage voltage regulator with a phase number not less than two to further convert the intermediate voltage to an output voltage by a split phase control, in which the ratio of the intermediate voltage to the output voltage is intended to the phase number such that the steady state output current of the converter approaches to be ripple-free, and hence the drivers and MOSFETs for the second-stage voltage regulator are lower cost, the efficiency of the second-stage voltage regulator is improved, and a higher slew rate current is obtained for transient driving capabilities.
机译:一种两步式无波纹多相降压转换器及其方法,包括:第一级电压调节器,将输入电压转换为中间电压;第二级电压调节器,其相数不少于两,以进一步转换该电压。通过分相控制获得中间电压与输出电压的比值,其中中间电压与输出电压的比值与相数有关,以使转换器的稳态输出电流趋于无脉动,因此用于第二级电压调节器的驱动器和MOSFET成本更低,第二级电压调节器的效率得到了提高,并且获得了更高的摆率电流以实现瞬态驱动能力。

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