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Universal-input integrated LED driver with robust \(\mathcal {H}_\infty \) controller for full-range high power factor and dimming capabilities under low current ripple

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Abstract

This work proposes a dimmable high-power factor LED driver operating from universal mains voltage range (90–264 V). In order to ensure stability and good dynamic response, for all operating points, a robust state feedback controller is used. Additionally, a \(\mathcal {H}_{\infty }\) optimization is employed to attenuate the undesired output current low-frequency ripple. The controller’s design is carried out by means of linear matrix inequalities (LMIs). In order to validate the theoretical analysis, a 34 W integrated off-line buck–boost flyback converter prototype was built. The results have shown the capability of the control scheme of ensuring robust stability and performance throughout the whole operating range, as well as providing an output current ripple attenuation of about 66%.

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Acknowledgements

This research was supported in part by Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) under Grant 001, Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) under grant 302364/2022-6 and 404068/2020-0, Fundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG) under Grant APQ-03609-17 and Instituto Nacional de Energia Elétrica (INERGE).

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Authors and Affiliations

  1. Federal University of Juiz de Fora, Juiz de Fora, MG, Brazil

    Bruno H. da Silva, Pedro S. Almeida, Guilherme M. Soares, Pedro G. Barbosa & Pedro M. de Almeida

  2. Federal University of Santa Maria, Santa Maria, RS, Brazil

    Vinícius F. Montagner

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  1. Bruno H. da Silva
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  2. Pedro S. Almeida
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  3. Guilherme M. Soares
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  4. Pedro G. Barbosa
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  5. Vinícius F. Montagner
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  6. Pedro M. de Almeida
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Correspondence to Pedro M. de Almeida.

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Silva, B.H.d., Almeida, P.S., Soares, G.M. et al. Universal-input integrated LED driver with robust \(\mathcal {H}_\infty \) controller for full-range high power factor and dimming capabilities under low current ripple. Electr Eng 105, 1897–1910 (2023). https://doi.org/10.1007/s00202-023-01787-6

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