High efficiency adaptive boost converter for LED drivers

Yang Lu, Dariusz Czarkowski, Wieslaw E. Bury

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper presents the design and simulation results of an 89% power efficient CMOS adaptive controlled boost (step-up) LED driver implemented in 0.25 μm BCD (Bipolar CMOS DMOS) technology. A novel adaptive minimum frequency control provides up to 32 V from a single battery (3.6 V to 5.5 V) input supply to 10 series-connected LEDs at the output. The proposed control scheme provides an accurate load current (3-50 mA) while achieving 6%-12% higher power efficiency than conventional fixed on-time schemes. The novel control circuitry is able to switch between PWM (Pulse width modulation) and PFM (Pulse frequency modulation) automatically by calculating the feedbacks from the inductor and LED's currents. This controller is functional from light to heavy loading situations which is critical in improvement of power efficiency and battery life-time for high-boost ratio applications in order as provide accurate LED current.

Original languageEnglish (US)
Title of host publication2011 7th International Conference-Workshop Compatibility and Power Electronics, CPE 2011 - Conference Proceedings
Pages315-318
Number of pages4
DOIs
StatePublished - 2011
Event2011 7th International Conference-Workshop Compatibility and Power Electronics, CPE 2011 - Tallinn, Estonia
Duration: Jun 1 2011Jun 3 2011

Publication series

Name2011 7th International Conference-Workshop Compatibility and Power Electronics, CPE 2011 - Conference Proceedings

Other

Other2011 7th International Conference-Workshop Compatibility and Power Electronics, CPE 2011
CountryEstonia
CityTallinn
Period6/1/116/3/11

Keywords

  • LED driver
  • PFM
  • PWM
  • boost
  • dc-dc converter
  • high efficiency
  • step-up

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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  • Cite this

    Lu, Y., Czarkowski, D., & Bury, W. E. (2011). High efficiency adaptive boost converter for LED drivers. In 2011 7th International Conference-Workshop Compatibility and Power Electronics, CPE 2011 - Conference Proceedings (pp. 315-318). [5942253] (2011 7th International Conference-Workshop Compatibility and Power Electronics, CPE 2011 - Conference Proceedings). https://doi.org/10.1109/CPE.2011.5942253