Why is some LED power supply only responds to reverse phase dimmer?

Discussion in 'General Electronics Chat' started by gardenyu, Oct 21, 2009.

  1. gardenyu

    Thread Starter New Member

    Aug 11, 2009
    I've found some LED power supplies, only respond to reverse phase dimmres (turn on power at zero crossing then turn off somewhere in the middle of the half sine wave pulse), there are some flickering or even not fully on when connected to normal front edge dimmers.
    Is it only due to some certain noise?