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Stabilising current driver for high-voltage light-emitting diodes

机译:高压发光二极管的稳定电流驱动器

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摘要

High-voltage light-emitting diodes (HV LEDs) possess higher cut-in voltages and works at a high supply voltage. As the specific feature, they can be directly driven via universal utility-line voltages after appropriate rectification. This significantly simplifies the circuit structure and reduces the manufacturing cost. While HV LEDs are driven directly by half-wave rectified DC power source, which is an impure form of DC, their lumen is easily affected by changing the AC voltage source, while only constant current control is insufficient for stable lumen, thus hindering their usefulness in practical applications. This study proposes a simple, however effective, HV LED driver via a proportional and integral current control accompanied with feedforward compensation which is capable of maintaining stable lumen under changing AC voltage sources. Experimental results have demonstrated satisfactory performance in lighting.
机译:高压发光二极管(HV LED)具有较高的切入电压,并在高电源电压下工作。作为特定功能,经过适当的整流后,它们可以通过通用市电电压直接驱动。这显着简化了电路结构并降低了制造成本。虽然HV LED由半波整流的DC电源直接驱动,而DC是不纯的DC形式,但通过改变AC电压源,其流明很容易受到影响,而仅恒定电流控制不足以实现稳定的流明,因此妨碍了其实用性。在实际应用中。这项研究提出了一种简单但有效的HV LED驱动器,该驱动器通过比例和积分电流控制以及前馈补偿来实现,该前馈补偿能够在变化的AC电压源下保持稳定的流明。实验结果证明了在照明方面令人满意的性能。

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