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

Daheon Hong, Honnyong Cha

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

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.

Original languageEnglish
Article number9442256
Pages (from-to)14187-14194
Number of pages8
JournalIEEE Transactions on Power Electronics
Volume36
Issue number12
DOIs
StatePublished - Dec 2021

Keywords

  • Charge balance condition
  • current balancing
  • current-fed (CF)
  • LED current balancing
  • quasi-z-source (qZS) network

Fingerprint

Dive into the research topics of 'LED Current Balancing Scheme Using Current-Fed Quasi-Z-Source Converter'. Together they form a unique fingerprint.

Cite this