The cause of the flicker may be that the load current is too large or the load voltage is too small, which is lower than the low output voltage of the power supply and causes automatic protection. The LED lamp beads do not match the LED drive power supply. Normal single foot 1W lamp beads withstand current: 280-300mA, voltage: 3.0-3.4V. If the lamp bead chip is not full power, it will cause the flicker phenomenon of the light source. If the current is too high, the lamp bead will be turned on and off, and the serious phenomenon will burn the gold or copper wire built into the lamp bead.

1: The LED light flashes, which belongs to the latter case: During the capacitor charging process, the light is off-due to the small internal current of the capacitor, the charging speed is very slow. When the capacitor is fully charged, the electric energy will be released at a time, and the electric lamp will be lit, but due to the less stored electric energy, the electric lamp will soon go out-repeated charging and discharging.

2: If the outdoor lamp also has the phenomenon of flickering on and off, it is that the lamp has entered the water, the lamp bead and the driver are broken, and if the drive is waterproof, the lamp bead is just broken and the light source can be replaced.

3: Even in LED driver applications that provide good power factor correction and support TRIAC dimming, electromagnetic interference (EMI) filters are required, and transient currents caused by TRIAC steps will excite the EMI filter Natural resonance of inductance and capacitance.

4: The switch controls the neutral line, and the switch controls the neutral line, which means that the live wire is directly connected to the electric lamp (capacitor). If there is a low potential in the line at this time, a potential difference will be formed-another name for the potential difference is called voltage. However, the potential difference at this time is much smaller than 220V. When a voltage is applied across the capacitor, a weak current is generated.

5: The zero line is easy to be charged-especially the zero line of the electric lamp. Mainly because the light switch is too unreliable.

6: The voltage sampling circuit design is unreasonable, the power supply voltage is too low, lower than the normal working voltage and the power supply cannot start.