Although the LED has high luminous efficiency, only a small part of the energy flowing through the LED can be radiated out in the form of light. Most of the remaining energy is consumed in the form of heat in the LED. Therefore, the LED light source itself is relatively hot. The main reasons for the low reliability of the industry LED driver are as follows:
First, long-term full-load work.
In the case of no dimming, the LED driver is working at full load, and in most applications of switching power supplies, such as computer power supplies (adapters), communication power supplies, household appliances, etc., the average power for long-term operation is usually only the rated power. A fraction of a full power state with all loads turned on will only occur for a certain amount of time.
Second, close to the heat source.
Although the LED has high luminous efficiency, only a small part of the energy flowing through the LED can be radiated out in the form of light. Most of the remaining energy is consumed in the form of heat in the LED. Therefore, the LED light source itself is relatively hot. The LED driver is usually placed inside the luminaire, close to the LED light source. At a normal temperature of only 20-30 ° C, the ambient temperature around the driver can easily reach 50-60 ° C. At such a high temperature, the driver must be guaranteed. Reliability is very challenging for design (especially efficiency indicators).
Third, for outdoor lighting such as roads and plazas, it is vulnerable to natural phenomena such as lightning strikes.
These will cause a series of shortcomings such as post-maintenance for the large-scale application of LED semiconductor lighting.
The high reliability of LED driver power is an important condition for the quality of LED products, and it is also a technical problem to be solved.
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