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What Are the Factors Affecting the Life of LED Power Supply

1. Impact of practical application environment: high humidity environment, high temperature environment, dusty environment, strong magnetic environment and vibration environment2. Influence of lighting temperature on Environment: the internal temperature of lighting is less than 65 , the shell of lighting is less than 75 , and the power temperature is less than 60 3. Impact of power supply grid: the voltage input of unstable grid will impact the components of LED power supply, thus affecting the service life of LED drive.

What Are the Factors Affecting the Life of LED Power Supply 1

4. Influence of insulation and installation: the correct installation and good insulation of the product will enhance the application force of LED power supply.5. Influence of electrolytic capacitor: vaporized electrolyte will leak out from the sealing part of electrolytic capacitor, which will accelerate with the increase of temperature. It is generally believed that the leakage rate will increase to twice for every 10 rise in temperature.Therefore, it can be said that the electrolytic capacitor determines the service life of the power supply device.

If the high-temperature electrolytic capacitor with 105 degrees and a service life of 10000 hours is selected, according to the current electrolytic capacitor service life estimation formula "every 10 degrees is reduced, the service life is doubled", then it has a working life of 20000 hours under 95 degrees and 40000 hours under 85 degrees.The normal working life of the LED driving power supply depends on the life of the electrolytic capacitor used by the power supply, and the life of the electrolytic capacitor depends on the life of the capacitor itself and the working temperature.The service life of the capacitor at 65 can only guarantee about 80000 hours; The service life of the capacitor at 75 can only guarantee about 40000 hours; The service life of the capacitor at 85 can only guarantee about 20000 hours; The service life of the capacitor at 95 can only guarantee about 10000 hours; From the above calculation, the service life of electrolytic capacitor will be halved every 10 rise in temperature.

6. Influence of switching times: most power supplies are equipped with capacitor input rectifier circuit. When the power supply is connected, surge current will be generated, resulting in switch contact fatigue, increase of contact resistance, adsorption and other problems. Theoretically, it is considered that the on-off times of the switch are about 10000 during the expected life of the power supply.7. Impact of impulse current protection resistance and thermal power resistance: in order to resist the impulse current generated when the power supply is connected, the resistance is usually used in parallel with SCR and other components in the design of the power supply.When the power supply is connected, the power peak value is up to dozens to hundreds of times of the rated value, resulting in resistance thermal fatigue and open circuit. Thermal fatigue will also occur in thermistor power resistors under the same conditions.

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