A novel line frequency multistage conduction LED driver with high power factor

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)

Abstract

This paper proposes a novel line frequency multistage conduction LED driver with current-limiting mechanism. By operating the LED driver in multistage conduction, the number of LEDs can be automatically adjusted to be driven with low ac voltage, which increases the LED utilization rate. The current-limiting mechanism offers overcurrent protection to the LEDs. With the aim of shaping the input current into a sinusoidal waveform, the number of LEDs and the current-limit values are determined by the proposed analysis methods; these steps improve the power factor (PF) and the total harmonic distortion of input current (THDi). Finally, two prototype circuits - two-stage conduction and three-stage conduction LED drivers - are built to verify the performances, such as LED utilization rate, THDi, PF, and system efficiency.

Original languageEnglish
Article number6936356
Pages (from-to)5103-5115
Number of pages13
JournalIEEE Transactions on Power Electronics
Volume30
Issue number9
DOIs
Publication statusPublished - 2015 Sep 1

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Fingerprint

Dive into the research topics of 'A novel line frequency multistage conduction LED driver with high power factor'. Together they form a unique fingerprint.

Cite this