LED power protection scheme and common causes of damage
As a new green lighting technology, high-power white LED has advantages such as high light conversion efficiency, low energy consumption, long life and no maintenance, and is gradually applied to various lighting fields.
The long life of LED is based on its safe working environment. For LED lighting, there are two main threats that affect its life: First, over-current shock, that is, the current applied to the LED exceeds the maximum rated current in the LED technical data sheet. , including over-current shock caused by over-voltage; the other is overheating damage.
These damages can be manifested as immediate failure of the device, or it can occur after a long time after an overcurrent shock event, shortening the LED operating life.