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One of the biggest obstacles in LED MR16 bulb design is producing bulbs that are dimmable with no flicker, compatible with electronic transformers. Electronic transformers, while much smaller than traditional magnetic transformers, present a formidable design problem when supplying the lower current required by LED bulbs. This lower LED current prevents most LED bulbs from operating with electronic transformers. A dimmer adds to this challenge by reducing the current further. Competitors’ drivers with no PFC can cause high current spikes during a short period, leaving the rest of the switching period with no current. Since all the energy is concentrated in a very short time, it is zero most of the time causing transformer to turn off. In addition, the high peaks can cause transformer damage.
PTM Published on: 2015-04-29
