This paper presents a new method to drive multiple LED strings efficiently. The proposed driver is based on single-inductor multiple-output (SIMO) switch-mode converters. Because the proposed driver gets rid of linear current regulators and maintains desired constant current of each string directly, it maximizes the overall efficiency and handles mismatching problems of the conventional driver. The simulation results show excellent performance on four-string LED with four 1W LEDs in each string including individual dimming. The measured efficiency was improved at least by 15% compared with the conventional driver of linear current regulators.
|ホスト出版物のタイトル||ISOCC 2012 - 2012 International SoC Design Conference|
|出版ステータス||Published - 2012|
|イベント||2012 International SoC Design Conference, ISOCC 2012 - Jeju Island|
継続期間: 2012 11月 4 → 2012 11月 7
|Other||2012 International SoC Design Conference, ISOCC 2012|
|Period||12/11/4 → 12/11/7|
ASJC Scopus subject areas