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Integrity of power in PCB circuit
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The method and steps of shoveling PCB
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PCB processing technology and equipment
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Processing technique of SMD
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PCBA test
PCBA test
PCBA test is the most crucial quality control step in the entire PCBA processing procedure, which should be in...
Several important elements in the later check of PCB design
Several important elements in the later check of PCB design
When the routing in finished on one PCB Prototyping board and there is no error in both the connecting and th...
Why does poor tin welding always occur in PCB
Why does poor tin welding always occur in PCB
In the process of PCB Prototype design and production, do you usually meet the problems that poor tin welding...
Maintenance of PCB dividing board
Maintenance of PCB dividing board
1.The reasons for the operational problems occurring to PCB Prototyping dividing boards: When the storage bat...
The common malfunctions and the treatments of PCB sub-machine
The common malfunctions and the treatments of PCB sub-machine
1.If the indicator light is off when the switch in opened: one possible reason is the fuse wire is fused and n...
An analysis on the design method and main points of PCB chart
An analysis on the design method and main points of PCB chart
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How to handle PCB components layout in designing LED switching power supply?

November 24, 2018

PCB Image:How to handle PCB components layout in designing LED switching power supply?

As a new member of switching power supply family, currently, LED switching power supply has been applied widely in many fields. In the R&D of new products, layout of PCB components is the most important part in designing LED switching power and a key test for engineers in designing the schemes as well. Then, what should we do achieve the best effects in the layout of PCB components? To achieve the best OCB components layout for the LED switching power supply, the first point which deserves full attention is the size of PCB before designing the layout of PCB components. When the size of PCB is too large, the printing wires will have to bee very long, leading to an increase in the impedance and a reduction in noise immunity, as well as a rising cost. In addition, once the printing wires are too long, neighbouring wires will be easily disturbed. Generally, the best shape for a PCB universal for the LED switching power is rectangle, with a proportion of 3:2 or 4:3 in length and width and the distance for components in the edge of the board should be no less than 2mm from the edge. After finishing the design of PCB size, the next step is to think about parameters distribution among the components, which is particularly important to circuits working in a high-frequency environment. Generally, circuits should be best arranged in parallel, which is not only beautiful, but also easy to be welded and to proceed mass production as well.

When placing components in the PCB Quote board, you should never be too rash but to consider about the following welding issues, which requires engineers to lay out components in a reasonable way but not make them too concentrated. In the process of design, engineers should consider the key component of every functional circuit as the core and make integrated layout of the components centering on core components. In the process of layout, components should arranged on the PCB in an even, orderly and compact way; leads and connective lines between the components should reduced and shortened to the minimum extent; decoupling capacitor should be near to the component’s VCC.

Besides, in laying out PCB components of LED switching power supply, it is suggested that engineers should arrange the position of every functional circuit based on the procedure of the circuits. This kind of layout will will the signal flow more effectively and rapidly and make the signals maintain the same direction. In laying out PCB board, the first principle is to ensure routing rate; connection between the flying lines should also be paid special attention; components connected with wires should be put together. The size of loop should be reduced to the minimum extend to stop radiated disturbance of the switching power.