(1) First and foremost, consider the PCB size. If the PCB is too large, the printed lines will be longer, increasing impedance and reducing noise immunity, while also raising costs. Conversely, if it's too small, heat dissipation will be poor, and nearby lines are prone to interference. The circuit board shape is rectangular, with a length-to-width ratio of 3:2 or 4:3. Components located at the edges of the circuit board are generally not less than 2mm from the edge.
(2) When placing components, consider future焊接 and avoid over-crowding.
(3) Center the layout around the core components of each functional circuit. Components should be evenly, neatly, and compactly arranged on the PCB, with an effort to minimize and shorten the leads and connections between components. Decoupling capacitors should be as close as possible to the VCC of the devices. Aviation Ground Power 2, 36V Aviation Power 1, 400Hz Frequency Converter Power 7, 115/200V Power 2, 27V DC Power 5, 400Hz Power 12, Aviation Power
(4) In high-frequency working conditions, the distributed parameters between components should be considered. The reason the circuit should arrange components in parallel as much as possible is that this not only enhances aesthetics but also facilitates assembly and soldering, making mass production easier.
(5) Arranging the positions of functional circuit units according to the circuit flow, with a layout conducive to signal flow, is essential to maintain the signals in as consistent a direction as possible.
The primary principle of layout is to ensure the wiring connectivity rate. When moving components, be mindful of the connections of flying wires and group components with wiring relationships together.
(7) Minimize loop area as much as possible to suppress radiation interference from the variable frequency power supply.
