At present, the LED lighting driver power supply without electrolytic capacitor is a focus of attention in the industry. Whether the LED lighting driver power supply should use electrolytic capacitors or not, this topic has many different sounds in the industry. Against the use of electrolytic capacitors, the industry believes that the working life of electrolytic capacitors is significantly shorter than that of LEDs, especially when the operating temperature is high, the working life of electrolytic capacitors will be shorter, and the heat emitted by LEDs is mainly from The PCB goes away, so the working life of the electrolytic capacitor on the PCB is inevitably affected, because the high operating temperature will cause the electrolyte of the electrolytic capacitor to dry quickly, thus greatly shortening the working life of the LED driving power supply . Bringing reliability issues to the entire LED lighting product.
So why is it difficult to remove electrolytic capacitors from high-quality LED lighting drivers? There are two main reasons for this. "The first major reason is that LED lighting driver power must have strong adaptability and reliability for grid fluctuations, such as lightning strikes, because many semiconductor components will fail due to overvoltage shock. Electrolytic capacitors have the reliability problem of electrolyte drying. However, if the electrolytic capacitor is simply removed, the LED lighting driver's immunity to grid fluctuations will be reduced, which will bring the risk of failure due to lightning strikes. Therefore, it is necessary to comprehensively evaluate the reliability of the product." iWatt Sales Assistant Paul Zhu said, "The second major reason is that removing electrolytic capacitors will bring high ripple current, and low-frequency flicker caused by high ripple current is harmful to human health, so it is getting more and more attention. Researchers believe that strobes below 165 Hz are not easily noticeable to the human eye, but they have caused physiological discomfort to some people's eyes. The large amplitude of low-frequency ripple will also cause some digital cameras to appear bright and dark. Grid. Therefore, at this stage, it is difficult to go to electrolytic capacitors on high-quality light source lamps. Of course, the market is eager to have both electricity and electricity. We have a new solution for maintaining longevity and reliability, and we are still exploring this aspect."
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