A New Design Method for High-Power High-Efficiency Switched-Capacitor DC–DC Converters
A New Design Method for High-Power High-Efficiency Switched-Capacitor DC–DC Converters
复制标题
DOI：
10.1109/tpel.2007.915043
复制
发表时间：
2008-03
影响因子：
6.7
通讯作者：
Fan Zhang;Lei Du;F. Peng;Z. Qian
中科院分区：
文献类型：
--
作者：
Fan Zhang;Lei Du;F. Peng;Z. Qian
开关电容技术广泛应用于低功率dc-dc变换器，特别是集成电路的电源管理。这些电路有一个局限性：在开关瞬态会产生高脉冲电流，这会降低效率并引起电磁干扰问题。这使得该技术难以在高功率电平转换中使用。本文提出了一种利用开关电容技术设计dc-dc变换器的新方法。该方法可以降低传统变换器存在的大脉冲电流问题。因此，这种新设计的变换器的功率水平可以扩展到1kw甚至更高。设计了一种用于42v汽车系统的1kw 42/ 14v开关电容变换器。该变换器不需要磁性元件，在满负荷时可达到98%和96%的峰值效率。本文分析了dc-dc变换器的主电路，提出了其控制方案。实验结果验证了分析结果，并证明了该方法的优越性。
Switched-capacitor technology is widely used in low power dc-dc converter, especially in power management of the integrated circuit. These circuits have a limitation: high pulse currents will occur at the switching transients, which will reduce the efficiency and cause electromagnetic interference problems. This makes it difficult to use this technology in high-power-level conversion. This paper presents a new design method for dc-dc converter with switched-capacitorldquo technology. The new method can reduce the high pulse current which usually causes serious problem in traditional converters. Therefore, the power level of this new designed converter can be extended to 1 kW or even higher. A 1-kW 42/14-V switched-capacitor converter was designed for 42-V automotive system. The proposed converter has no requirement for magnetic components and can achieve a peak efficiency of 98% and 96 % at full load. The main circuit of the dc-dc converter is analyzed and its control scheme is presented in the paper. The experimental results verified the analysis and demonstrate the advantages.