A Very Low-Profile Dual Output LLC Resonant Converter for LCD/LED TV Applications

The concept of low-profile power supply becomes a current issue because of the recent trends in LCD/LED TV consumer market. Realizing a low-profile power supply with high power density is a challenging work due to the size limitation of passive components. In this paper, a very low-profile dual outp...

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Bibliographic Details
Published in:IEEE transactions on power electronics 2014-07, Vol.29 (7), p.3514-3524
Main Authors: Demirel, Ibrahim, Erkmen, Burcu
Format: Article
Language:English
Subjects:
Applied sciences
Capacitors
Circuit properties
Computer simulation
Converters
Density measurement
Display
Dual Output
Electric potential
Electric, optical and optoelectronic circuits
Electrical engineering. Electrical power engineering
Electronic circuits
Electronics
Exact sciences and technology
Imaging devices
Inductance
leakage reduction method
Liquid crystal displays
LLC resonant converter
low-profile power supply
Passive components
Power electronics, power supplies
Power supplies
Power system measurements
Rectifiers
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Signal convertors
Television
Voltage
Windings
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Summary:The concept of low-profile power supply becomes a current issue because of the recent trends in LCD/LED TV consumer market. Realizing a low-profile power supply with high power density is a challenging work due to the size limitation of passive components. In this paper, a very low-profile dual output LLC resonant converter proposed by considering the criteria of 10 mm component height limit without any drop-in cuts on the surface of printed circuit board. The simulation model of the converter is applied to the SPICE tool in order to estimate the performance and borders of the passive components. On the basis of theoretical approach and simulation results, two low-profile transformers are utilized in order to acquire a prototype with 200 W output power (24 V/6 A and 12 V/4.5 A). LLC series resonant converter prototype with the dimension of 140 mm × 291 mm × 10 mm achieves 89.4% efficiency at nominal load conditions. The input voltage range is between 330 to 400 V and the nominal input voltage is specified as 400 V. Operating frequencies are obtained as 65 and 81 KHz at 330 and 400 V, respectively, under the nominal load conditions. Thermal and electromagnetic interference performances of the proposed converter are included in the paper to validate experimental study.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2013.2278715