Design and evaluation of a solar based single inductor multiple outputs LED lighting

Haiyan Xu, Huiqing Wen, Xingshuo Li

Research output: Chapter in Book or Report/Conference proceedingConference Proceedingpeer-review


When driving the paralleled LED strings, the large forward tolerance across the LED will result in the current non-uniformly distributed between each string, which causes LEDs to be overdriven and influence the lifespan. This paper presents a single inductor multiple outputs parallel string LED driver with time multiplexing control schemes. Two kinds of pulse-width modulation schemes are presented and compared. The system architecture, operation principle, simulation and hardware implementation results are demonstrated. The efficiency of the LED driver based on PWM scheme II approaches 88.9% with less than 5% current mismatch between each parallel LED strings, an improvement over PWM scheme I.

Original languageEnglish
Title of host publicationIET Conference Publications
PublisherInstitution of Engineering and Technology
ISBN (Electronic)9781785610400
Publication statusPublished - 2015
EventInternational Conference on Renewable Power Generation, RPG 2015 - Beijing, China
Duration: 17 Oct 201518 Oct 2015

Publication series

NameIET Conference Publications


ConferenceInternational Conference on Renewable Power Generation, RPG 2015


  • Current unbalance
  • DSP
  • LED driver
  • Single inductor multiple output (SIMO)

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