SIMOスイッチモードコンバータに基づいて高効率でマルチチャンネルなLEDドライバ

抄録

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 problem of the conventional driver. The measured efficiency was improved at least by 15% compared with the conventional driver of linear current regulators.