Both isolated and non-isolated LED drive power solutions have advantages and disadvantages. We believe that Class II will be the mainstream because it simplifies LED cooling . Class I or II systems rely on grounding systems and, in most cases, are closely related to the installation location. Class II is more common, requiring two-stage or reinforced isolation, which requires transformer magnetic windings, insulation tapes, and physical isolation. ClassI systems require a grounded enclosure and/or mechanical barrier that is not required by the Class II system.
There are several trends that are driving the development of the LED lighting market. The first is the continuous improvement of high-brightness LED efficiency and the emergence of highly efficient high-reliability constant-current LED drive power, followed by global legislation prohibiting incandescent lighting (due to its low efficiency) and the gradual fading out of CFL energy-saving lamps (if broken) If it does, it will emit mercury that is harmful to the environment). The combination of these factors is making LED lighting a long-term trend. Of course, low system costs (including LEDs, thermal management systems, and LED drivers ) are always the driving force for consumers to adopt LED general lighting.
In fact, in many LED lighting products, failure is a common phenomenon, mostly because of the failure of the power supply, not the failure of the LED.
At the design level, this means that the OEM must become an expert in system thermal design. LEDs provide high efficiency, but they also generate more heat transfer than incandescent or energy-saving lamps. Since many LED lighting applications are enclosed in a small space, it is difficult to dissipate heat by ventilation. Without careful thermal design, LEDs and power drive circuits can easily degrade or permanently fail due to high temperatures.
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