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
收藏
页码：426 / 428
页数：3
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