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Problems and disadvantages of compatible thyristor dimming

Oct 20, 2020

Problems and disadvantages of compatible thyristor dimming

Although many multinational chip companies have launched chips and solutions compatible with existing thyristor dimming. But such solutions are not recommended, the main reasons are as follows:

1. Thyristor technology is an old technology with more than half a century. It has many shortcomings as mentioned above and is a technology that should be eliminated long ago. It should withdraw from the stage of history at the same time as incandescent lamps and halogen lamps.

2. Many of these chips claim to have PFC, which can improve the power factor. In fact, it only improves the power factor as a thyristor load, making them look close to pure resistance incandescent lamps and halogen lamps, but did not improve The power factor of the whole system including SCR.

3. The overall efficiency of all thyristor-compatible LED dimming systems is very low. Some have not considered the loss of bleeder resistors required for stable operation, completely damaging the high energy efficiency of LEDs.