Reasons for LED damage

1. Sudden increase in power supply voltage. There are many reasons that can cause a sudden increase in the voltage of the power supply, such as quality issues with the power supply or improper use by the user.

2. A local short circuit in the LED power supply path caused by a short circuit in a certain component, printed line, or other wire in the circuit, resulting in an increase in voltage at that location.

3. A certain LED is damaged due to its own quality, resulting in a short circuit, and its original voltage drop is transferred to other LEDs.
4. The high temperature inside the lamp deteriorates the characteristics of the LED.

5. Water has entered the interior of the lamp, and water is conductive.

6. Failure to properly prevent static electricity during assembly has resulted in the interior of the LED being damaged by static electricity. Although normal voltage and current values are applied, it is still highly likely to cause damage to the LED.

These reasons will cause a significant increase in LED current, and soon the LED chip will be burned out due to overheating. According to experience, after LED burns out, most of them have a two pole short circuit, and a small number have an open circuit. Each LED has a voltage drop of about 3.2V, and if it burns out and breaks, this string of LEDs will not light up. If there is a short circuit, this voltage will be transferred to other LEDs, causing them to have a larger current, which will burn out faster and even endanger the power supply. Small damages can easily lead to major accidents. LEDs are usually installed at high places, which makes installation difficult and maintenance even more challenging. So the protection of LED is a practical need, but currently it has not been given much attention and is also a difficult problem that many people cannot solve.