10 Rules for PCB Component Layout

杭猎板

10 Rules for PCB Component Layout [Copy link]

This article introduces 10 rules for PCB component layout.

1. Follow the layout principle of "big first, small later, difficult first, easy later", that is, important unit circuits and core components should be laid out first.

2. The layout should refer to the principle block diagram and arrange the main components according to the main signal flow of the single board.

3. The components should be arranged to facilitate debugging and maintenance. That is, large components should not be placed around small components, and there should be enough space around components and devices that need to be debugged.

4. For circuits with the same structure, use the "symmetrical" standard layout as much as possible;

5. Optimize the layout according to the standards of uniform distribution, balanced center of gravity, and beautiful layout;

6. The same type of plug-in components should be placed in the same direction in the X or Y direction. The same type of polarized discrete components should also be kept consistent in the X or Y direction to facilitate production and inspection.

7. Heat-generating components should generally be evenly distributed to facilitate heat dissipation of the board and the entire machine. Temperature-sensitive devices other than temperature detection components should be kept away from components that generate large amounts of heat.

8. The layout should try to meet the following requirements: the total connection should be as short as possible, and the key signal line should be the shortest; high voltage, high current signals should be completely separated from small current, low voltage weak signals; analog signals should be separated from digital signals; high frequency signals should be separated from low frequency signals; high frequency components should be sufficiently spaced.

9. The layout of the decoupling capacitor should be as close to the power pin of the IC as possible, and the loop formed between it, the power supply and the ground should be as short as possible.

10. When laying out components, appropriate consideration should be given to placing devices using the same power supply together as much as possible to facilitate future power supply separation.

This article is compiled and provided by lieban.com.

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If we summarize it this way, there are more than 10 points