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What a led driver's reliability depends on? PDF 打印 E-mail
An LED driver's  reliability depends upon:
  • The number and quality of components used within the driver design
  • The rated wattage of the LED driver and the maximum operating temperature of the electrolytic capacitors
  • The overall efficiency of the AC-DC and DC-DC stages of the driver.
  • A suitable thermal management system for the driver such as an aluminium case or forced air cooling fanif appropriate.
  • Good driver design where component placement is determined by both safety, EMC and thermal considerations.
  • The ambient operating temperature where the driver is used.

Methods are being developed to enable reliability testing of LED drivers by predicting the lifetime of electrolytic capacitors used within LED drivers. Therefore, it will soon be possible to determine the good quality LED drivers from the bad.

In the meantime, I would suggest you take your LED driver and determine if it contains electrolytic capacitors and assess their respective maximum rated temperature values against the operating temperatures measured and if they are close look for another LED driver with higher rated electrolytic capacitors.

High temperature electrolytic capacitors are rated from 105oC up to 125oC and I would not recommend the use of LED drivers that do not employ such components.
 
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