scholarly journals Constant frequency, non‐isolated multichannel LED driver based on variable inductor

2021 ◽  
Author(s):  
Guozhuang Liang ◽  
Hanlei Tian ◽  
Hetong Wang ◽  
Yiwen Xia ◽  
Xianyong Xiao
Keyword(s):  
Led Driver ◽  
Constant Frequency ◽  
Variable Inductor

SPICE-aided design of a variable inductor in LED driver applications

2016 ◽  
Author(s):  
J. Marcos Alonso ◽  
Marina Perdigao ◽  
Guirguis Z. Abdelmessih ◽  
Marco A. Dalla Costa ◽  
Yijie Wang
Keyword(s):  
Led Driver ◽  
Variable Inductor ◽  
Aided Design

Analysis, Design, and Experimentation of a Dimmable Resonant-Switched-Capacitor LED Driver With Variable Inductor Control

2017 ◽  
Vol 32 (4) ◽  
pp. 3051-3062 ◽  
Author(s):  
Marco Martins ◽  
Marina S. Perdigao ◽  
Andre M. S. Mendes ◽  
Rafael A. Pinto ◽  
J. Marcos Alonso
Keyword(s):  
Switched Capacitor ◽  
Led Driver ◽  
Variable Inductor ◽  
Analysis Design

Single-Stage LED Driver with Dimming and Universal Input Voltage Capability

2020 ◽  
Author(s):  
Giancarlo Clerici Daros ◽  
João Pedro Scherer Cipriani ◽  
Maikel Fernando Menke ◽  
Álysson Raniere Seidel
Keyword(s):  
Power Factor ◽  
Duty Cycle ◽  
Harmonic Distortion ◽  
Input Voltage ◽  
Current Control ◽  
Single Stage ◽  
Output Current ◽  
Constant Frequency ◽  
Good Efficiency ◽  
Variable Inductor

This paper presents a boost bridgeless totem-pole converter operating as power factor correction (PFC) stage integrated with a half-bridge LLC resonant converter as power control (PC) stage. The resultant single-stage converter yields in an effective integration, reducing the number of switches from 4 to 2 (50% reduction). This integrated topology aims decreasing conduction and commutation power losses and, moreover, achieving high power factor (PF), low total harmonic distortion (THD) and good efficiency. The converter is designed to have a fixed bus voltage, which is controlled by changing the half-bridge duty cycle under universal input voltage (UIV). However, since the HB duty cycle also affects the LLC converter due to their integration, a variable inductor is employed to control the LLC impedance and achieve a controlled output current and dimming capability, consequently a constant frequency operation is achieved. Simulation results are presented to verify the theorical analysis, through a 100 W LED luminaire. The results show voltage and current levels in the topology, as well as PF and THD levels in compliance with IEC 61000-3-2. Moreover, it is shown the feasibility of output current control capability through variable inductor even with HB duty cycle variation.

Analysis and design of a novel variable-inductor-based LED driver for DC lighting grids

2016 ◽  
Author(s):  
J. Marcos Alonso ◽  
Marina Perdigao ◽  
Marco A. Dalla Costa ◽  
Gilberto Martinez ◽  
Rene Osorio
Keyword(s):  
Led Driver ◽  
Analysis And Design ◽  
Variable Inductor
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