led driver triac dimmable is a dimming method commonly used in incandescent lamps and energy-saving lamps. Its working principle is to cut the input voltage waveform through the conduction angle,

Produce a tangential output voltage waveform. Applying the tangential principle can reduce the effective value of the output voltage, thereby reducing the power of the load (such as LED lights).

The advantages of triac dimming forward or reverse phase are higher working efficiency and stable performance. However, based on its working principle, there are also some design defects in application. The root cause of the defect is that after the Triac is turned on, a sustaining current is required to maintain the conduction, otherwise it will return to the off state.

Different Triac maintain different currents, usually between a few mA to tens of mA, and some even reach 50 mA. The greater the power, the greater the maintenance current required. If the maintenance current is not enough, the conduction angle will be unstable, the output waveform will be uneven, and vibration and spikes will be generated. When such an unstable output is added to the LED It will flicker when it is up .