Balancing scheme for phase current and flying-capacitor voltage in three-level DC-DC converter

被引：0

作者：

Choi, Minho ^{[1
,2
]}

Kye, Chan-Ho ^{[1
]}

Jeong, Deog-Kyoon ^{[1
]}

机构：

[1] Seoul Natl Univ, Dept Elect & Comp Engn, Seoul, South Korea

[2] Samsung Elect, Hwaseong, South Korea

来源：

ELECTRONICS LETTERS | 2020年 / 56卷 / 09期

关键词：

mathematical analysis; DC-DC power convertors; capacitors; inductors; voltage control; balancing scheme; phase current; flying-capacitor voltage; three-level DC-DC converter; flying capacitor; multilevel multiphase DC-DC converter; ripple voltage; average inductor-current value; prototype; 4-phase; voltage imbalance; phase-current imbalance; current; 36; 0; mA; voltage; 9; V; 1; 2; A;

D O I：

10.1049/el.2019.3938

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A balancing scheme for phase current and voltage of the flying capacitor in a fully integrated multi-level multi-phase DC-DC converter is proposed. The proposed balancing scheme based on the ripple voltage of the flying capacitor can simultaneously mitigate the imbalance of phase current and voltage of the flying capacitor. A mathematical analysis shows the proposed scheme can obtain the current information of the flying capacitor during charging and discharging operations and finally obtain the average inductor-current value. A prototype 4-phase 350 MHz three-level DC-DC converter shows <4.7% voltage imbalance of the flying capacitor and <36 mA phase-current imbalance at output voltage and maximum load current of 0.9 V and 1.2 A, respectively.

引用

页码：426 / 428

页数：3

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