| 中文摘要 |
A methodology about modeling and analysis of switched-capacitor-based (SC) two-stage current- mode multiphase voltage doubler (MPVD) is suggested for the low-power step-up DC-DC conversion. The SC-based converter needs no magnetic element, so the integrated circuit fabrication will be promising. This current-mode MPVD can obtain the high boosting voltage gain just by using the least number of pumping capacitors, so it will save the device areas more. Besides, with a current source and pulse-width-modulation (PWM) control, a closed-loop current-mode MPVD is proposed not only to enhance regulation capability for different desired outputs, but also to reinforce output robustness against source noises. Here, the system modeling and theoretical analysis are including: state-space averaging model, steady-state DC analysis, transient AC analysis, power conversion efficiency, output ripple percentage, output capacitance selection, and system stability. Finally, the closed-loop current-mode MPVD is simulated by OrCAD, and the results are illustrated to show the efficacy of the proposed scheme. |
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