一种基于损失电压分析的开关电容功率转换器静态模型  

A Static Model for Switched Capacitor Power Converters Based on Loss Voltage Analysis

作　　者：郑心易 罗萍[1,2] 王浩 ZHENG Xinyi;LUO Ping;WANG Hao(State Key Lab.of Elec.Thin Films and Integr.Dev.,Univ.of Elec Sci and Technol of China,Chengdu 610054,P.R.China;Institute of Electronic and Information Engineering of UESTC in Guangdong,Dongguan,Guangdong523808,P.R.China)

机构地区：[1]电子科技大学电子薄膜与集成器件国家重点实验室,成都610054 [2]电子科技大学广东电子信息工程研究院,广东东莞523808

出　　处：《微电子学》2022年第5期758-763,共6页Microelectronics

基　　金：广东省基础与应用基础研究基金资助项目(2021A1515011309)。

摘　　要：介绍了一种适用于多相交错开关电容功率转换器的静态模型。分析了电容与电容之间的电荷传递行为,将开关电容功率转换器中的电荷再分配损耗和开关导通损耗等价地描述为电荷传递子过程的电压损失。该模型可以简便、准确地描述任意开关频率下开关电容功率转换器的等效输出电阻。同时,运用了一种新的“比例电流近似”方法,建立了带电流负载时的电荷传递模型,用以描述和分析负载和输出去耦电容对电容功率转换器静态特性的影响。相比于传统模型,提出的模型在中等开关频率下能准确地描述开关电容功率转换器的静态特性,同时能准确地描述多相交错控制中开关电容功率转换器的输出电压纹波。A static model for multiphase interleaving switched capacitor power converter(SCPC) is proposed. The general capacitor-to-capacitor charge transfer behavior was analyzed. The charge redistribution loss and switch conduction loss in SCPC were described as voltage loss in the charge transfer subprocess equivalently. The equivalent output resistance of a switched capacitor power converter at any switching frequency could be predicted easily and accurately. A “proportional current approximation” method was proposed to establish a charge transfer model with a current load. Therefore, the effects of load and output decoupling capacitors on the static characteristics of capacitive power converters could be predicted and analyzed. Compared with the traditional model, the proposed model can accurately describe the static characteristics of the switched capacitor power converter at medium switching frequency. The output voltage ripple of SPCP in multi-phase interleaving control can be predicated as well.

关 键 词：开关电容功率转换器 建模 输出电压纹波 多相交错控制 功率集成电路 

分 类 号：TN624[电子电信—电路与系统]