Analysis of LED Lamps' Sensitivity to Surge Impulse

The results of research on the influence of the 1.2/50 mu s (8/20 mu s) surge impulse on the reliability of commercial LED lamps are presented in the paper. For two types of lamps, differing in the declared warranty period, tests were carried out in which it was determined how the impulse of 1.2/50 mu s (8/20 mu s) is propagated in their supply systems. During the tests, the effects it causes on the critical levels and how its level influences the probability of failure of the tested lamp were examined. These solutions are currently being used in mass production of LED lamps and are characteristic of budget devices. Sensitivity tests were conducted for a group of 150 lamps divided evenly into 10 batches. The tests were carried out in accordance with the standards of EN 61000-4-5: 2014 and EN 61547: 2009 with one exception: the impulse level was not limited to the 0.5 kV recommended in EN 61547: 2009 for this class of components, but increased to a value that leads to permanent damage. These tests allowed us to determine the margin from the value specified in the standard to the sensitivity of the tested lamps on this type of disturbance.

Automated summary

The paper presents the results of research on the influence of the 1.2/50μs (8/20μs) surge impulse on the reliability of commercial LED lamps. The tests showed that the propagation of the impulse in the supply systems has effects on critical levels and the probability of lamp failure. These findings are significant for the mass production of budget LED lamps.