PCB layout method of non-isolated switching power supply

Abstract

The invention discloses a PCB layout method of a non-isolated switching power supply, particularly relates to the field of power supply circuits, and specifically comprises the following steps: step 1, determining each element, step 2, performing 3D modeling distribution, step 3, performing circuit simulation, step 4, exporting a plane assembly drawing, step 5, detecting, scanning and checking, and step 6, performing on-site testing. According to the invention, 3D software is utilized to process the PCB, the functional elements, the circuit and the peripheral objects in actual installation of the PCB; power supplies and other functional elements are planned; then, Multisim circuit simulation software is used for simulating voltage, current and heating and heat dissipation conditions of the circuit after actual electrification; therefore, the optimal scheme of PCB layout is determined, a drawing is exported for assembly by a constructor, after assembly, the installed PCB is scanned by using a laser scanner, the position of a functional element is perfected and adjusted, and finally, a temperature sensor and a voltage and current sensor are used for detecting a circuit and carrying out a voltage-bearing test, so that the optimal layout is ensured.

Description

technical field [0001] The present invention relates to the technical field of power supply circuits, and more specifically, the present invention relates to a PCB layout method of a non-isolated switching power supply. Background technique [0002] A common problem with switching power supplies is "erratic" switching waveforms. Sometimes, the waveform jitter is in the acoustic range, and the magnetic components produce audible noise. If the problem is with the PCB layout, it can be difficult to figure out why. Therefore, the correct PCB layout at the initial stage of switching power supply design is very critical; [0003] The design of PCB is divided into two stages of "layout" and "wiring". The so-called "layout" is to arrange all the components used in the principle design on the PCB. Considering the direction, prepare for the subsequent "wiring". [0004] The invention patent of patent application publication number CN 107484344 A discloses a PCB layout method based...

AI Technical Summary

Problems solved by technology

[0005] However, the PCB layout method based on the PIN pin of the core chip provided in the above-mentioned technical solution still has many shortcomings when it is actually used. Such a layout method is to divide the area according to the function, and in the periphery of the corresponding functional area of ​​​​the core chip, there are still many shortcomings. To supplement the corresponding functional circuit unit, only the position of the core chip is determined, and no in-depth analysis is made on the position and function of the peripheral components. The installation and wiring of the peripheral components are not accurate, which will affect the stability and heat dissipation of the core chip. This layout is too simple