The lamp beads are classified as voltage-active devices. In practice, the current is 20mA as the upper limit, but it will often increase the current due to various reasons in use. If the protection method is not selected, this increased current The LED lamp beads will be damaged after a certain period of time and unevenness.
The main reasons that constitute the damage of the LED lamp beads are:
① The supply voltage suddenly rises.
② The short circuit of a certain component or printed line or other wire in the circuit makes the part of the power supply path of the LED lamp bead short-circuit, which increases the local voltage.
③ A certain LED lamp bead is short-circuited due to its own quality damage, and its original voltage drop is transferred to other LED lamp beads.
④ The temperature inside the lamp is too high, which deteriorates the characteristics of the LED lamp beads.
⑤ Water enters into the lamp, and the water is conductive.
⑥ The anti-static work was not done at the time of installation, so that the inside of the LED lamp bead has been damaged by static electricity. Although the normal voltage and current values are applied, it is very easy to cause damage to the LED lamp beads.
