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Capacitor Clamped Current-Sharing Circuit for Multistring LEDs.
- Source :
-
IEEE Transactions on Industrial Electronics . May2014, Vol. 61 Issue 5, p2423-2431. 9p. - Publication Year :
- 2014
-
Abstract
- This paper proposes a simple capacitor clamped current-sharing circuit including linear and loop types according to the connection of capacitors for multistring light-emitting diodes (LEDs). The proposed circuit employs interleaved turn-on switches and multicapacitor charge conservation to solve the current imbalance problem caused by voltage drop tolerance and the negative temperature coefficient of LEDs. The operating principle and parameter design of the topologies are analyzed in detail. Based on this analysis, a three-string current-sharing topology has been validated by experiments. Experimental waveforms show that the proposed circuit does not only have good effect on current sharing while the effect is not affected by individual LED short but also has the advantages of low voltage stress, nonmagnetic components, ease of integration, and simple control. [ABSTRACT FROM PUBLISHER]
Details
- Language :
- English
- ISSN :
- 02780046
- Volume :
- 61
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Industrial Electronics
- Publication Type :
- Academic Journal
- Accession number :
- 91554197
- Full Text :
- https://doi.org/10.1109/TIE.2013.2274412