To take high-power white LED as a new green lighting, it will have many advantages such as light conversion, high efficiency, low power consumption, long life, no maintenance, etc. And thus it gradually used in a variety of lighting in the field. The long life of the LED is based in the safe working environment. As far as LED lamps china lighting is concerned, there are two factors affecting the life. One is the over electric shock which is applied to the LED on the current exceeding the maximum rated current of the LED technology in the date sheet, including over-voltage caused by over-current shock; Another is overheating damage. Damage can be expressed as the immediate failure of the components and it may also occur through electric shock after the incident for a long time before failure and to shorten the working life of LED.
LED lamps china causes of damage
LED lights failure first from the power supply and drive failure, the second is from the LED assembly failure. From the input power, it is usually damage to the LED power supply and drive through electric shock(EOS) and the load side of circuit failure.
LED components failure
Transient over-current events is the maximum rated current flowing through the LED current in the LED lamps china technology data sheet, which may be the direct result of the large current or indirectly due to the high voltage generation, such as transient lightning switch over voltage event of power transient switching noise, power fluctuations caused by over current. These events are transient, very short duration. we usually referred to as spikes, such as "current spikes, voltage spikes. The transient over-current is caused by LED connected to the transient over-current power or hot plug.
LED lighting in the car, ISO7637-2 transient load-dump surge impact, it is a major threat to their normal work.
LEDs subjected to electric shock after the failure mode is not fixed, but will usually result in damage to the welding line. This damage is usually caused by a great deal of transient over-current, which will cause weld lines blown and may also lead to other parts of the damage near the welding line, such as sealing materials.