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

• Published in: IEEE transactions on power electronics Vol. 27; no. 10; pp. 4329 - 4337
• Main Authors: Lamar, D. G., Fernandez, M., Arias, M., Hernando, M. M., Sebastian, J.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.10.2012; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• 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; Power converter; Brightness; Small signal behavior; Power system harmonics; Power system stability; Driver; LEDs; Inductor; Luminous efficiency; Implementation; Ballast electricity; Output voltage; Power factor regulation; Energy quality; Harmonic distortion; Power factor; Inward current; Cost lowering; current control; Incandescent lamp; Small signal; switched mode power supplies; System design; Power electronics; lighting; Light emitting diode; High power; AC-DC power conversion; High efficiency; Service quality; Comparative study
• ISSN: 0885-8993; 1941-0107
• DOI: 10.1109/TPEL.2012.2190756

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.