Why does the glass cabinet led strip light heat

There are two main reasons for the heating problem of LED strip light:

First, the line design problem:

At present, the most commonly used specifications of LED strip light are 12V and 24V two voltages, 12V is 3 strings of multi-channel parallel structure, 24V is 6 strings of multi-channel parallel structure, because LED strips are to be connected and used, how long each type of light strip can be connected, and the width of the line and the thickness of the copper foil have a lot to do with the design. Because the current intensity that can be borne per unit area is related to the cross-sectional area of the line, if this is not taken into account when wiring, then when the connection length exceeds the current that the line can bear, the light strip will heat up due to overcurrent, which damages the circuit board at the same time, and also reduces the service life of the LED.

Solution: The circuit should be as wide as possible, the spacing between the lines should be sufficient, and the rest of the space should be full. The thickness of the copper foil should be thickened as much as possible without violating the customer's requirements for the total thickness of the circuit board, and the general thickness is 1

oz 2. Production process problems:

Because the LED strip is a series-parallel structure, when there is a short circuit in a certain group of circuits, it will cause the voltage of other LEDs in the same group to rise, the brightness of the LED will increase, and the corresponding heat will also rise. The most obvious is in the 5050 light strip, when the 5050 light strip has a short circuit in any of the chip circuits, it will cause the current of the lamp bead of the short circuit to double, that is, 20mA becomes 40mA, the brightness of the lamp bead will become very bright, but at the same time, the heat will also increase sharply, and the circuit board will be burned in a few minutes. However, because this problem is relatively obscure, it is generally not very noticeable, because the short circuit does not affect the normal luminescence of the light strip, if the staff responsible for the test only pays attention to whether the LED is shining, and does not check the abnormality of brightness, or does not do visual inspection, only do electrical testing, often ignore this problem, which is why many LED light strip manufacturers always encounter customer complaints that the product is hot but can not find the reason.

Solution: a. When printing solder paste, try not to let the solder pads be connected to the tin, so as to avoid the occurrence of soldering short circuit caused by poor printing;

b. Avoid short circuit when patching;

c. Check the position of the patch before reflow;

D. After reflux, do a visual inspection to ensure that there is no short circuit in the light strip and then do an electrical test review, and pay attention to whether the LED is abnormally bright or abnormally dark after the recheck.

LED light strip heating is a normal phenomenon, the longer the lighting time, the greater the heat, if the heat causes the light strip to change color, it is abnormal, buy inferior products with poor heat treatment is not good on a large amount of heating, the life of the light bar is also short, I hope mine can help you, we also do light bars, you can compare.

When using LED strip lights, if you find that the light strip is heated, we should not be in a hurry first, we should judge what is the cause, usually for the simple lighting supplies such as the light strip, there are no more than two reasons: 1. Circuit design problems; 2. Production process problems.

When we encounter the first situation, what should we do, first of all, when we design and install, we should try to make the wiring wide enough, the spacing between the lines is sufficient, and the rest of the space is best to be full. The thickness of the copper foil should be thickened as much as possible without violating the customer's requirements for the total thickness of the circuit board, and the general thickness is 1 oz. When it is solved, we should remove it from the new wiring, install it from the new, and you can do it.

If it is the second case, it is a bit of a problem, we need to find the manufacturer to find after-sales service, but we should avoid this situation and should do some checks when buying, such as try not to let the solder pads connect the tin phenomenon when printing solder paste, so as to avoid the occurrence of soldering short circuit caused by poor printing; After reflow, do a visual inspection to check whether the patch is in its original position. Make sure that there is no short circuit in the light strip and then do the electrical test review, and pay attention to whether the LED is abnormally bright or abnormal dark after the recheck. Like patch is a very important one, LED SMD flexible light strip is mainly used for decorative purposes, so the main customer in China is the engineering installation company.

Due to the fact that many people do not know much about LED SMD flexible light strips, many customers will miss some links when calculating the project, adding some unnecessary costs to themselves.

The constant current of the LED used in the LED strip is 20mA, so the current supplied by the power supply must not be greater than this constant current. Many friends only pay attention to the voltage when using, and ignore the current specification, which often leads to the LED breakdown due to the excessive power supply current, resulting in the damage of the LED strip.

There are no more than two reasons: 1. Line design problems; 2. Production process problems.