2021
DOI: 10.18618/rep.2021.3.0010
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Hybrid Dual-Loop Control for Current Regulation and Low-Frequency Ripple Rejection in Led Drivers

Abstract: This paper presents a new hybrid dualloop control system for the DC/DC LLC resonant converter, operating as a downstream DC/DC converter in a two independent stage offline LED driver. The outer loop employs a PI controller to maintain the average LED current regulated at the reference value and reject parametric variation.The inner loop implements an adaptive periodic disturbance rejection (APDR) subsystem, thus conceiving the hybrid PI&APDR controller. The APDR subsystem is designed to strictly reject the bus… Show more

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