A New Two-Stage Multiple-Parallel-Channel LED Driver Using a CLL-C Resonant Converter and Time Division Control Technique

Duc Hung Tran, Zeeshan Waheed and Woojin Choi ()
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Duc Hung Tran: School of Electrical Engineering, Soongsil University, Seoul 06978, Republic of Korea
Zeeshan Waheed: School of Electrical Engineering, Soongsil University, Seoul 06978, Republic of Korea
Woojin Choi: School of Electrical Engineering, Soongsil University, Seoul 06978, Republic of Korea

Energies, 2025, vol. 18, issue 5, 1-17

Abstract: This paper introduces a new two-stage multi-parallel-channel LED driver using a CLL-C resonant converter as the first stage and a Time Division Multiple Control circuit as the second stage. The first stage of the proposed converter topology has been developed from CLL-C topology with an additional inductor in the primary side and a capacitor in the secondary side. The converter provides a constant current at a resonant frequency with a Zero Phase Angle (ZPA), thus achieving Zero Voltage Switching (ZVS) turn-on, nearly Zero Current Switching (ZCS) turn-off for the switches, and ZCS for the diodes. The Time Division Multiple Control (TDMC) circuit was applied in the second stage to share the balanced current to each LED string. A 200 W prototype with five output channels was implemented to verify the superior advantages of the proposed topology with a maximum efficiency of 95.05%.

Keywords: CLL-C; light-emitting diode; multistage LED driver; resonant converter; time division multiple control (TDMC) (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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