Single-Switch Multichannel Current-Balancing LED Drive Circuits Based on Optimized SC Techniques

Yuanmao Ye; Ka Wai Eric Cheng; Jiongkang Lin; Daohong Wang

doi:10.1109/TIE.2015.2408813

Single-Switch Multichannel Current-Balancing LED Drive Circuits Based on Optimized SC Techniques

Yuanmao Ye, Ka Wai Eric Cheng, Jiongkang Lin, Daohong Wang

The Hong Kong Polytechnic University

Research output: Journal article publication › Journal article › Academic research › peer-review

23 Citations (Scopus)

Abstract

By combining the conventional switched-mode power converters with advanced switched capacitor (SC) techniques, a plurality of single-switch current-balancing circuits is developed to drive multiple light-emitting diode (LED) strings in this paper. Compared with the existing current-balancing LED drivers, the proposed drive circuits exhibit their attractive advantages in size and cost efficiency because just one active switch and one magnetic device are required. LED strings' current can be regulated by controlling the duty ratio of the switch in pulsewidth-modulation mode. Both advanced resonant and nonresonant SC methods are introduced to optimize the performance of the proposed LED drivers. The feasibility and theoretical analysis are verified with a 9-W dual-channel nonisolated prototype and a 25-W four-channel isolated prototype.

Original language	English
Article number	7055309
Pages (from-to)	4761-4768
Number of pages	8
Journal	IEEE Transactions on Industrial Electronics
Volume	62
Issue number	8
DOIs	https://doi.org/10.1109/TIE.2015.2408813
Publication status	Published - 1 Aug 2015

Keywords

Current-balancing
light-emitting diodes (LEDs)
pulsewidth modulation (PWM)
resonance
switched capacitor (SC)

ASJC Scopus subject areas

Control and Systems Engineering
Electrical and Electronic Engineering

More information

10.1109/TIE.2015.2408813

Cite this

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title = "Single-Switch Multichannel Current-Balancing LED Drive Circuits Based on Optimized SC Techniques",

abstract = "By combining the conventional switched-mode power converters with advanced switched capacitor (SC) techniques, a plurality of single-switch current-balancing circuits is developed to drive multiple light-emitting diode (LED) strings in this paper. Compared with the existing current-balancing LED drivers, the proposed drive circuits exhibit their attractive advantages in size and cost efficiency because just one active switch and one magnetic device are required. LED strings' current can be regulated by controlling the duty ratio of the switch in pulsewidth-modulation mode. Both advanced resonant and nonresonant SC methods are introduced to optimize the performance of the proposed LED drivers. The feasibility and theoretical analysis are verified with a 9-W dual-channel nonisolated prototype and a 25-W four-channel isolated prototype.",

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AB - By combining the conventional switched-mode power converters with advanced switched capacitor (SC) techniques, a plurality of single-switch current-balancing circuits is developed to drive multiple light-emitting diode (LED) strings in this paper. Compared with the existing current-balancing LED drivers, the proposed drive circuits exhibit their attractive advantages in size and cost efficiency because just one active switch and one magnetic device are required. LED strings' current can be regulated by controlling the duty ratio of the switch in pulsewidth-modulation mode. Both advanced resonant and nonresonant SC methods are introduced to optimize the performance of the proposed LED drivers. The feasibility and theoretical analysis are verified with a 9-W dual-channel nonisolated prototype and a 25-W four-channel isolated prototype.

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Single-Switch Multichannel Current-Balancing LED Drive Circuits Based on Optimized SC Techniques

Abstract

Keywords

ASJC Scopus subject areas

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