A white LED driver using a buck-boost converter

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dc.contributor.authorEguchi, Kei
dc.contributor.authorPongswatd, Sawai
dc.contributor.authorWatanabe, Toshiya
dc.contributor.authorPannil, Pittaya
dc.contributor.authorTirasesth, Kitti
dc.contributor.authorSasaki, Hirofumi
dc.date.accessioned2026-08-06T09:59:44Z
dc.date.available2026-08-06T09:59:44Z
dc.date.issued2010-01-01
dc.description.abstractFor mobile backlighting applications, a white LED (WLED) driver using a buck-boost converter is proposed in this letter. Unlike conventional converters using boost converters, 2×/1.5× charge pumps, and so on, the proposed converter offers the negative stepped-down voltage to drive the LED's cathode only when the input voltage is insufficient to drive a 1× transfer mode. Furthermore, unlike the LED backlight using charge pumps, the proposed converter can adjust the output voltage by controlling the duty factor of the clock pulse. Thus, the proposed converter can realize high power efficiency. The validity of the proposed converter is confirmed by simulations and experiments. © 2010 Institute of Electrical Engineers of Japan.
dc.identifier.citationIeej Transactions on Electrical and Electronic Engineering, 5(5), 613-614, 2010
dc.identifier.doi10.1002/tee.20581
dc.identifier.issn19314973
dc.identifier.other2-s2.0-77956895191
dc.identifier.urihttps://dspace.kmitl.ac.th/handle/123456789/2908
dc.sourceIeej Transactions on Electrical and Electronic Engineering
dc.subjectBacklighting applications
dc.subjectBuck-boost converters
dc.subjectDC-DC converters
dc.subjectNegative outputs
dc.subjectSwitching converters
dc.subjectWhite LEDs
dc.titleA white LED driver using a buck-boost converter
dc.typeLetter

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