PCB Technical - The principles of PCB layout

PCB Layout refers to PCB layout. In order to obtain the best performance of electronic circuits, the layout of electronic components and the wiring of wires are very critical links. To make PCB with good quality, low cost and high performance, the design should be focused on the layout. The following are the principles of PCB layout:

In PCB design, we must first fully consider the size of the PCB. The size of the PCB affects the performance of the PCB. It is necessary to design different sizes of the PCB according to the actual situation and the needs of the PCB, and then determine the PCB, and then determine the location of the special components., Finally, all circuit components are laid out according to the functions required by the circuit.

Special electronic components generally refer to the key components of the high-frequency part, the core components in the circuit, high-voltage electronic components, etc. The location of the special electronic components is the key to the PCB layout, so as to meet the requirements of circuit functions and production The required PCB layout, improper placement of special electronic components, or circuit compatibility problems, affecting signal integrity, etc., lead to the failure of PCB design.

1.Shorten the connection between high-frequency components as much as possible, and strive to reduce the distribution parameters of high-frequency components and electromagnetic interference problems

2. Electronic components that are susceptible to interference should not be placed too close, and the input and output terminals should be as far away as possible

3. Some electronic components or wires have a higher potential difference. The distance between them should be increased to avoid short circuit problems. High-voltage electronic components should be placed in hard-to-reach places.

4. Electronic components weighing more than 15 grams should be fixed and welded with brackets. Electronic components with heavy and high temperature characteristics need to consider heat dissipation in advance and should be placed on the bottom plate of the main box.

5. Thermal components should be far away from heating components

6. The layout of adjustable components should fully consider the structural requirements of the entire PCB

7. The frequently used switches should be placed at hand easily accessible

Generally speaking, PCB layout should strive to achieve balanced performance and density.