Common situations and precautions for led lamp chip damage
Because LED lighting fixtures (commonly: LED fluorescent lamps, LED bulb lamps, LED ceiling downlights, etc.) have the characteristics of low carbon, environmental protection, energy saving, and long life, they have quickly become the new favorites of consumers. However, any product must operate well under normal operation. Otherwise, the light one will "strike", and the heavy one will damage the original product. Below, we will talk about six reasons why LEDs are damaged. It is hoped that users who have read this short article can be vigilant in their lives, and take into account the characteristics of the use of LEDs and protect them.
1. Sudden increase in power supply voltage. There are many reasons for the sudden increase of the power supply voltage. For example, the quality of the power supply, or the improper use of the user, etc., may cause the power supply voltage to suddenly increase. Good voltage control is the key
2. The short circuit of a component or printed line or other wire in the circuit forms a local short circuit of the LED power supply path, which increases the voltage in this place. The quality of the components is very important and must be strictly selected.
3. A certain LED is short-circuited due to its own quality damage, and its original voltage drop is transferred to other LEDs. Must be aging to find the problem
4. The temperature inside the led lamp is too high, which makes the characteristics of the LED deteriorate. The key to heat dissipation is to do a good job of heat dissipation.
5. Water enters into the LED lamp, and the water is conductive. Do a good job of waterproofing and moisture-proofing.
6. When assembling, the anti-static work was not done well, so that the inside of the LED 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. Must bring static ring
These reasons will cause the LED current to rise significantly, and soon the LED chip will be burned out due to overheating. According to our experience, after the LED burns, most of the two poles are short-circuited, and a small part of it is open circuit. Each LED has a voltage drop of about 3.2V. If it is burned out, the string of LEDs will not emit light. If this voltage is short-circuited, it will be transferred to other LEDs, causing greater currents in other LEDs, and other LEDs will be burned out faster, and even the power supply may be critical. A small damage can easily cause a major accident. LEDs are generally installed in high places, it is not easy to install, and even more difficult to repair. Therefore, the protection of LED is an actual demand, but it has not been paid attention to by everyone at present. Hope that users can attract relevant attention.
