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LED驱动器设计使更具成本效益的拓扑结构
减少闪烁，平滑调光，更小的封装尺寸，更低的功耗水平，更高的精度，以及材料的低成本单（BOM）是所有目标的LED驱动器制造商和用户的目的打在他们的搜寻的应用程序中，包括灯具，灯具，大量LED拓宽市场的适应性，以及改造的情况。
为了实现这一目标，所有的实验与传统的AC-DC变换拓扑结构的变化，其次是驱动和控制与反激式反馈电路的LED。本文将着眼于低，中，高功率LED的功率因数校正（PFC），功耗，调光范围，输出亮度和恒定电流要求方面的性能要求，并会提供一些建议，并行与串行安排。
The selecTIon of the type of LED driver design depends on the choice of LEDs to be driven. Mid-power LEDs （generally ones with input currents of roughly 30 to 150 mA， luminosiTIes of 30 to 110 lumens， and efficacies up to 130 lm/W） are being pushed by some LED makers. However， this can lead to lower output light levels， higher drive currents， greater power dissipaTIon， and lower light quality. It also affects power factor correcTIon （PFC） and can lead to unsatisfactory input constant-current levels.
Some high-power LED manufacturers， however， argue that using more high-power LEDs to get more light output can be beneficial. This approach provides up to a 60% reduction in heatsink costs and requires 80% fewer LEDs， resulting in less pc-board space， smaller beam angles， and less optics， leading to lower system costs. Ultimately， lower costs at acceptable performance levels will be the deciding factor.
