Efficiency Analysis for Interleaved Buck Converters Employed as Extra-High Current COB LED Drivers

Dênis de Castro Pereira, Everton Bernard Figueiredo Rabelo, P. S. Almeida, Guilherme Márcio Soares, F. L. Tofoli, Henrique Antônio Carvalho Braga
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Abstract

This work presents a performance evaluation concerning interleaved buck structures used to drive extra-high current (up to 12 A) chip-on-board (COB) light-emitting diodes (LEDs). The analysis is carried out employing nonideal elements in simulations so that a better and reliable approach can be obtained as close to real results as possible. Aiming at a thorough analysis of conduction losses at very high current levels in floodlighting applications, interleaved buck converters (IBCs) are employed to establish a comparative approach concerning global efficiency and component count for conventional and synchronous topologies. Furthermore, the 3-cell IBC is experimentally implemented to evaluate and compare the total losses for this very-high current lighting application.
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用于超高电流COB LED驱动的交错降压变换器效率分析
这项工作提出了一个关于用于驱动超高电流(高达12 a)片上(COB)发光二极管(led)的交错降压结构的性能评估。在模拟中采用非理想元素进行分析,以便得到更可靠、更接近实际结果的方法。为了深入分析泛光灯照明应用中非常高电流水平下的传导损耗,采用交错降压转换器(IBCs)建立了一种关于传统拓扑和同步拓扑的全局效率和元件数量的比较方法。此外,实验实现了3单元IBC,以评估和比较这种非常高电流照明应用的总损耗。
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