There are two main reasons for the death of LED street lamp: the leakage current of LED is too large to cause the failure of PN junction, so that the LED street lamp does not light, which generally does not affect the operation of other led lamp. The internal connection lead of LED street lamp is disconnected, which causes the dead lamp due to no current passing through the led. This situation will affect the normal operation of other led lamp.
How to solve the problem of dead light in LED street lamp?
In the LED packaging production line, it is also very important whether the grounding resistance of all kinds of equipment meets the requirements. Generally, the grounding resistance is required to be 4 ohms. In some cases with high requirements, the grounding resistance should be less than 2 ohms. Too high welding temperature will also cause the LED dead light phenomenon. the expansion coefficient of LED leads at high temperature is several times higher than that at about 160 C. the internal gold wire welding point will open the welding point because of too large thermal expansion and cold contraction, which will cause the dead light phenomenon.