The structure of LED strip lights
Today I will explain the structure of LED strip lights. Many friends do not know much about the structure of LED strip lights. I hope that through this article, I can learn more about LED strip lights.
LED strip light structures are divided into the following two types:
One is the ordinary type, that is, series-parallel circuit structure;
One is the combination type, which is the structure used by the magic strip light, which contains integrated circuits and timing control circuits.
The following will explain the related issues about LED strip lights with commonly used LED strip lights:
1. What materials are LED strip lights made of?
LED strip lights are composed of FPC, LED, chip resistors, waterproof silicone, connection terminals and other materials.
2. What is the circuit structure of the LED strip light?
The circuit structure of conventional LED strip lights is a series-parallel circuit. Most of the LED strip light wholesale products provided to us are 12V powered LED strip lights, which use three LEDs and a chip resistor to be connected in series to form a component circuit; Each LED strip light is composed of 10 component circuit combinations connected in parallel.
The advantages of designing the circuit structure in this way are:
A. The use of resistor voltage division can effectively ensure that the LED works under the specified rated voltage, and will not shorten the service life of the LED because the input voltage exceeds the rated voltage of the LED.
B. Parallel shunting can effectively reduce the impact of the input rated current on each group of LEDs through a parallel circuit, allowing the LEDs to be stabilized within a current range, thus greatly increasing the service life of the LEDs.
C. Parallel constant voltage, because each group of LEDs is a parallel structure, so cutting off one group will not affect the normal use of other groups, which can effectively save installation costs and avoid waste.
3. What is the physical structure of LED strip lights?
LED strip lights are divided into 4 types according to width, including 6mm/8mm/10mm/12mm, and 6 types according to LED size, including 0603, 0805, 1206, 1210, 5050, and 5060. So what is the physical structure of each LED strip light? We also provide conventional LED strip lights (led5050 220v flexible strip light) as an example to illustrate their physical structure.
Since LED strip lights need to be divided according to the specific length of the strip light, the number of LEDs and the cutting position, no matter what kind of LED strip light, the arrangement of its physical structure is calculated according to the following formula:
Length of LED strip - width of cutting position x number of cuts)/number of LEDs = LED spacing.
Number of LEDs/3=number of chip resistors
4. On what basis are the pad width and spacing of LED strip lights determined?
The pad width spacing of the LED strip light is determined according to the LED size specification used. If it is 0603 specification, the pad width is determined according to the proportion of 0603; if it is 0805, 1206, 1210 and other specifications, the soldering pad width is determined according to the 0603 specification. The pad width can be 0805 or 1206. The specific size can be determined according to the power of the LED strip and the power shared to the resistor; for 5050 and 5060 size LED strips, the pad width must comply with 1206 specifications, because the 5050 and 5060 specifications of LED strips have relatively large power, so there are requirements for the size of the pad and the power of the resistor.