Abstract
The ongoing demand for smaller and lighter power supplies is driving the motivation to increase power density while maintaining a robust design compatible with international harmonic standards. Transformer design is a major challenge for low profile and high power density TV power cards. In addition to these, for electromagnetic interference standard and for providing efficient thermal management for heat emission, it is required to minimize EMI noise. In this study, by taking these stated criteria into consideration, a TV power card has been designed, which has 220W output power and can be used in low profile televisions. Proposed power card will meet desired critical parameters such as surface area and output power of the referenced card which has 13.5mm height, the heat, and power consumption at standby mode. Moreover, it is designed with 10mm height limit without any engraving on PCB in a way that it will meet International Electrotechnical Commission (IEC) current harmonic standard to which TVs are subjected. Experimental results demonstrate that the proposed power supply with 10mm height has 34% higher power density with respect to its counterpart having 13.5 mm height.
Highlights
Emergence of plasma display panel (PDP), liquid crystal display (LCD) and light emitting diode (LED) technologies created important decrease in the dimension and weight of TVs
Power consumption standards which the developing technology reveals have made the usage of topologies having maximum efficiency obligatory in TV power cards [1,2,3,4,5]
In this study a power card, which meets the specifications of a regular TV power card and whose height is reduced in order to be suitable for low profile televisions, having 10 mm height and 220W output, is designed without any engraving process on printed circuit board (PCB)
Summary
Emergence of plasma display panel (PDP), liquid crystal display (LCD) and light emitting diode (LED) technologies created important decrease in the dimension and weight of TVs. In [12], a new frequency controlled soft-switching resonant converter is proposed which has high power density, high efficiency, low switching losses and circuit components whose profile depth is decreased. 24V/6A and 12V/4.5A output LLC converter topology, with its serial primary and parallel secondary connection type, provides high power density. In this topology [14], secondary windings have asymmetrical connection and leakage inductances resulting from current imbalances are decreased. For power levels below 300W, because of high power factor correction, low cost and simple control structure; Boost type PFC converter, which operates in CrM, is used. Final section presents the concluding remarks and a discussion of optimization results
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