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LED switching power supply PCB component layout

With the development of science and technology, LED technology is also constantly developing, bringing various conveniences to our lives, providing us with various life information, and benefiting us human beings. If you want the LED switching power supply to have the best PCB component layout, then the first thing you need to do before designing the component layout is to fully consider the size of the PCB.
 


 

When the size of the PCB in the switching power supply is too large, because the printed lines are too long, it will cause an increase in impedance, a reduction in noise resistance, and a corresponding increase in cost. Once the printed circuit board is too small, the heat dissipation is not good, and the adjacent lines are easily interfered. Generally speaking, the best shape of the PCB circuit board for LED switching power supply is rectangular, the aspect ratio is 3: 2 or 4: 3, and the components on the edge of the circuit board are generally not less than 2mm from the edge of the circuit board.


After the design of the PCB size is completed, next we need to consider the distribution parameter between components, which is especially important for circuits working under high frequency conditions. The general circuit should arrange the components in parallel as much as possible, which is not only beautiful, but also easy to install and solder, and easy to mass produce.

When placing components on the PCB board, do not blindly seek fast, at this time it is necessary to comprehensively consider the future soldering issues. This also requires engineers to reasonably lay out the components, and do not place the components too densely. In the design process, the engineer should center on the core components of each functional circuit and arrange the overall component layout around the core components. During the layout process, the components should be evenly, neatly and compactly arranged on the PCB, to minimize and shorten the leads and connections between the components, and the decoupling capacitor should be as close as possible to the VCC of the device.

In addition, in the layout of the PCB components of the LED switching power supply, it is recommended that engineers arrange the position of each functional circuit unit according to the circuit flow. Such a layout can make the signal circulation more effective and fast, and keep the signal as consistent as possible. In the layout of the PCB board, the first principle is to ensure the wiring rate of the wiring, pay attention to the connection of the flying wire when moving the device, and put the devices with the connection relationship together. Reduce the loop area as much as possible to suppress the radiated interference of the switching power supply. The current LED lights may have some problems, but we believe that with the rapid development of science and technology, with the efforts of our scientific researchers, these problems will eventually be solved. The future LED must be high efficiency and high quality.