A common reason and treatment method of LED lights flashing
Usually the human eye can perceive light flashing frequency of 70 hz, above this frequency is not felt. So in LED lighting applications, if the pulse signal frequency is lower than 70 hz low frequency component, the eye will feel the shine. In the specific application, of course, there are many factors could lead to LED lights flashing. For example, in an off-line low power LED lighting applications, a common power supply topology type is to isolate the flyback topology. In compliance with "energy star" semiconductor solid-state lighting standard from line 8 w LED driver in GreenPoint? Reference design as an example, as a result of the flyback voltage regulator of sine square wave power conversion did not provide primary offset constant energy, dynamic self-supply (DSS) circuit may be activated and trigger light flashing. To avoid this problem, must enable primary bias to partial discharge in each half cycle, accordingly, need to choose appropriate constitute the bias circuit of capacitance and resistance value.