Causes and Solutions of LED Lamp Belt Fever

In our life, we will often use LED products, and in recent years, LED lamp belt has been widely used in various fields of decoration and decoration, many occasions need it to work for a long time lighting, which will lead to its heating due to long-term electricity. So what are the causes of fever, and how to solve it after fever, we will discuss it together.




Causes of fever:



1. Circuit: The most commonly used voltage specifications of LED lamp band are 12V and 24V respectively. The 12V is a 3-Series multi-channel parallel structure and the 24V is a 6-series multi-channel parallel structure. LED lamp band is connected by many beads, so how long the lamp band can be connected depends on the width of the circuit and the thickness of copper foil when it is designed. The current intensity that a lamp belt can withstand is related to the cross-sectional area of the circuit. When installing the lamp belt, we must pay attention to this point. If the connection length of the lamp belt exceeds the current that can be withstood, the lamp belt will surely cause heat when working because of the overload of the current, which will greatly damage the circuit board and reduce the effect of the lamp belt. Use life.



2. Production: LED strips are series-parallel structure, when one of them has a short circuit, it will lead to other groups of voltage on the strip, so the heat of the LED will increase accordingly. This phenomenon occurs most in the 5050 lamp band. When any chip of the 5050 lamp band is short-circuited, the current of the short-circuited lamp bead will double, 20mA will become 40mA, and the brightness of the lamp bead will become brighter. At the same time, it will cause serious fever, sometimes burning the circuit board in a few minutes. Causes the scrap of the LED lamp belt. However, this problem is relatively obscure, generally not to be noticed, because the short circuit does not affect the normal luminescence of the lamp belt, so few people often check. If the inspector only looks at whether the lamp band will emit light, but does not pay attention to whether the brightness of the LED is abnormal, or only inspects the appearance without current detection, then the reason why the LED will heat will often be ignored, which will cause many users to say that the lamp band will heat but can not find any reason.


Terms of settlement:



1. Circuit design:

Considering the current tolerance, the circuit should be designed as wide as possible so that the distance between lines is 0.5mm, and the rest of the space should be fully filled. In the absence of special requirements, the thickness of copper foil should be as thick as possible, generally 1-1.5 OZ. If the circuit is well designed, it will greatly reduce the heat of the LED lamp belt.



2. Production process:

(1) When welding the lamp group, try not to let tin connect between the pads, so as to avoid welding short circuit caused by poor printing.

(2) The lamp belt should also avoid short circuit when patching, and try to test it before using it.

(3) Check the location of the patch before reflux, and then reflux.

(4) After reflux, the appearance should be checked. After confirming that there is no short circuit in the lamp band, the electrical test should be carried out. After power-on, attention should be paid to whether the brightness of the LED is unusually bright or dark, and some cases should be checked.




After reading the article, you can check if there is a fever in the LED lamp belt. If you think the article is useful, you can share it and let more people see it. For more information about LED, please pay attention to Magic Lantern.