LED Current Balancing Scheme Using Current-Fed Quasi-Z-Source Converter

被引：4
|
作者：
Hong, Daheon [1 ]
Cha, Honnyong [1 ]
机构：
[1] Kyungpook Natl Univ, Sch Energy Engn, Daegu 41566, South Korea
来源：
IEEE TRANSACTIONS ON POWER ELECTRONICS | 2021年 / 36卷 / 12期
基金：
新加坡国家研究基金会;
关键词：
Light emitting diodes; Capacitors; Inductors; Switches; DC-DC power converters; Stress; Switching circuits; Charge balance condition; current balancing; current-fed (CF); LED current balancing; quasi-z-source (qZS) network; DRIVER; CIRCUIT;
D O I：
10.1109/TPEL.2021.3083842
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：
This article presents a novel two-channel light emitting diode (LED) current balancing method using current-fed (CF) quasi-Z-source (qZS) dc-dc converter. The proposed LED driver is simple in structure and requires minimal number of component counts. Currents flowing through the two LED strings are automatically balanced owing to charge (amp-sec) balance condition on capacitors in the CF-qZS network. Since current balancing is achieved automatically by passive components, current control of the proposed converter is very simple. In addition, the proposed circuit uses only one active switch and one diode. The operating principle and characteristics of the proposed two-channel LED driver are analyzed in detail. To verify validity of the proposed converter, 80 W prototype is built and tested.
引用
收藏
页码：14187 / 14194
页数：8
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