Tapped-Inductor Buck HB-LED AC-DC Driver Operating in Boundary Conduction Mode for Replacing Incandescent Bulb Lamps

High-brightness light-emitting diodes (HB-LEDs) are recognized as being potential successors of incandescent bulb lamps due to their high luminous efficiency and long lifespan. To achieve these advantages, HB-LED ballast must be durable and efficient. Furthermore, for this specific application, ac-d...

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Bibliographic Details
Published in:IEEE transactions on power electronics 2012-10, Vol.27 (10), p.4329-4337
Main Authors: Lamar, D. G., Fernandez, M., Arias, M., Hernando, M. M., Sebastian, J.
Format: Article
Language:English
Subjects:
AC-DC power conversion
Applied sciences
Circuit properties
current control
Electric currents
Electric power
Electric, optical and optoelectronic circuits
Electrical engineering. Electrical power engineering
Electronic ballasts
Electronic circuits
Electronics
Exact sciences and technology
Harmonic analysis
harmonic distortion
LEDs
Light emitting diodes
lighting
Magnetic devices
Mathematical model
Optoelectronic devices
power factor
Printed circuit boards
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Shape
Signal convertors
switched mode power supplies
Switching frequency
Topology
Transformers and inductors
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Summary:High-brightness light-emitting diodes (HB-LEDs) are recognized as being potential successors of incandescent bulb lamps due to their high luminous efficiency and long lifespan. To achieve these advantages, HB-LED ballast must be durable and efficient. Furthermore, for this specific application, ac-dc HB-LED ballast requires a high-step-down ratio, high power factor and low cost. This paper presents a tapped-inductor buck power factor corrector (PFC) operating in boundary conduction mode design for replacing incandescent bulb lamps. This low-cost solution presents a suitable high-step-down ratio without galvanic isolation in order to produce an output voltage of about 20 V from line voltage. In addition, the tapped-inductor buck PFC maintains high efficiency in comparison to other one stage solutions widely used to design low-cost ac-dc HB-LED drivers (e.g., flyback PFCs). Static analysis, input current distortion analysis, and an average small signal model of the tapped-inductor buck PFC have been implemented in this paper both to check the validity of the proposed solution and to provide a suitable design procedure of the ac-dc HB-LED driver. Finally, a 12-W experimental prototype was developed to validate the theoretical results presented.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2012.2190756