Eguchi, K.Shibata, A.Do, W.Asadi, Farzin2024-07-122024-07-1220211742-658810.1088/1742-6596/1729/1/0120082-s2.0-85101724698https://doi.org/10.1088/1742-6596/1729/1/012008https://hdl.handle.net/20.500.12415/74404th International Conference on Circuits, Systems and Devices, ICCSD 2020 -- 23 October 2020 through 25 October 2020 -- -- 167122For LED lighting applications, this paper presents a novel light emitting diode (LED) sink driver with high voltage gains. Unlike traditional LED sink drivers, the proposed LED sink driver consists of a buck-boost converter and a switched-capacitor (SC) step-up converter with nested topology, where an input voltage is converted twice by cascading these two converter blocks. Therefore, theproposed hybrid topology enables the LED sink driver to achieve not only flexible control of an output voltage but also high voltage gains and few passive components. The characteristics of the proposed LED sink driver are investigated by theoretical analysis, simulation program with integrated circuit emphasis (SPICE) simulations, and breadboard experiments. In the performed simulations, the power efficiency of the proposed driver reaches about 80 % at 500 mW when the duty factor is 0.5. Furthermore, the experiment demonstrates high voltage gains and flexible controllability of an output voltage. © Published under licence by IOP Publishing Ltd.eninfo:eu-repo/semantics/openAccessElectric Current RegulatorsGain MeasurementLight Emitting DiodesSpiceTopologyBuck Boost ConverterFlexible ControlHigh Voltage GainHybrid TopologiesPower EfficiencySimulation Program With Integrated Circuit EmphasisStep-Up ConverterSwitched CapacitorDc-Dc ConvertersConference Object1N/A1729