An off-line single-inductor multiple-output LED driver with high dimming precision and full dimming range

Sinan Li, Yue Guo, Siew-Chong Tan, S.Y.Ron Hui

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)

Abstract

This paper presents a single-inductor multiple-output (SIMO) LED driver with precise dimming and full dimming range. Based on the coordination of a string-level scheme and a system-level dimming scheme, the proposed SIMO LED driver can overcome practical constraints of existing SIMO LED drivers such as limited dimming range and needs for high-current switches. The proposal can achieve dimming precision up to an accuracy of 0.8% and also full dimming range. It has the flexibility of using either phase-shift or synchronous pulsewidth-modulated (PWM) switching for dimming control. The proposed circuit and control operations have been practically verified with a 25-W off-line SIMO-driven LED system. Practical evaluations of its power quality and energy efficiency are also provided.
Original languageEnglish
Pages (from-to)4716-4727
Number of pages12
JournalIEEE Transactions on Power Electronics
Volume32
Issue number6
Early online date2 Aug 2016
DOIs
Publication statusPublished - 30 Jun 2017

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