Two-Phase Resonant Converter to Drive High-Power LED Lamps

Abstract

This paper presents the design and modeling of a two-phase resonant converter that drives a LED lamp with a high-frequency pulsed current free of instabilities and flicker effect, fulfilling the recommendations of the IEEE PAR 1789-2015, so that it enables visible light-based communication at a 10 kB/s bit rate. The dynamic study of the converter takes into consideration the effect of the reflected impedance of the output filter on the AC side. In order to evaluate the dynamic response of the converter, a Spice model is defined. A 120 W prototype intended for street lighting applications has been built to validate the analysis and modeling.Electronics 2020, 9, 53 2 of 13 obtained from the envelope model of the converter. The experimental validation of the model is presented in Section 4, finalizing with the discussion of the results. Two-Phase Series-Parallel Resonant ConverterThe two-phase series-parallel (LC s C p ) resonant converter [8], shown in Figure 1, consists of the resonant inverter stage loaded by a center tap rectifier [9].Electronics 2019, 8, x FOR PEER REVIEW 2 of 13 model is obtained from the envelope model of the converter. The experimental validation of the model is presented in Section 4, finalizing with the discussion of the results. Two-phase Series-parallel Resonant ConverterThe two-phase series-parallel (LCsCp) resonant converter [8], shown in Figure 1, consists of the resonant inverter stage loaded by a center tap rectifier [9].

Latest Developments in LED Drivers

“…The final two papers, [12] and [13], introduce novel solutions to a new trend in LED drivers: VLC. The need for VLC-LED drivers derives from the fact that the RF spectrum is limited and expensive.…”

“…This novel task for LED drivers (i.e., communication) supposes major challenges in the design of dc-dc converters, which act as VLC-LED drivers: very high efficiency, a very fast output response and significant output power levels associated with the emitted light in order to cover real distances. The steady-state and dynamic analysis of the two-phase series-parallel resonant converter is presented in [12]. This topology is used to implement a VLC-LED driver with a pulse-based modulation (PBM) scheme.…”