Title :
A Simple Current-Balancing Converter for LED Lighting
Author :
Hwu, K.I. ; Chou, Sheng-Chien
Author_Institution :
Center for Power Electron. Technol., Nat. Taipei Univ. of Technol., Taipei
Abstract :
In this paper, a current-balancing converter is proposed herein and applied to driving LED strings paralleled, so as to make the required current shared among LED string. There are two stages of the proposed current-balancing converter. The first stage is one buck converter under constant current control and transfers DC current to AC current, whereas the second stage is passive AC-DC rectifiers with front-end current-balancing transformers. Some experimental results, together with a simple mathematical derivation, are provided to verify the proposed scheme.
Keywords :
AC-DC power convertors; LED lamps; current transformers; rectifying circuits; LED lighting; buck converter; constant current control; current-balancing converter; front-end current-balancing transformers; passive AC-DC rectifiers; Buck converters; Circuit topology; Current control; LED lamps; Light emitting diodes; Power electronics; Power generation; Rectifiers; Transformers; Voltage;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2009. APEC 2009. Twenty-Fourth Annual IEEE
Conference_Location :
Washington, DC
Print_ISBN :
978-1-4244-2811-3
Electronic_ISBN :
1048-2334
DOI :
10.1109/APEC.2009.4802717
