How to select leading edge dimming or trailing edge dimming?Time:2021-03-18 / Read:609
What is ‘leading edge’?
Leading Edge Dimming (TRIAC dimming) utilizes a current that is turned off as the AC waveform begins, right after it crosses zero. Leading Edge Dimming is typically used with incandescent bulbs, and produces a rush of voltage every half cycle, resulting in a rush of current to the light source.
What is ‘trailing edge’?
Trailing Edge Dimming (electronic dimming) utilizes a current that is turned off as the AC waveform ends, right before it crosses zero. This type of dimming is typically used with electronic drivers, and does not result in a rush of voltage (and in turn, a rush of current) to the light source.
The differences between a three-point leading edge dimmer and a trailing edge dimmer are listed below:
1.Cheaper and simpler
2.Provide high minimum load
3.Common in use but not in LED lighting circuits
1.More expensive and sophisticated
2.Provide low minimum load
3.Commonly used in low powered lighting circuits