Power Adapter PCB Layout for Compact High-Density Conversion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing power adapters are bulky and inefficient in space utilization, making it difficult to achieve lightweight, thin, and compact electronic products while maintaining power output.
Innovation Solution
The power adapter design optimizes circuit board layout by strategically placing electromagnetic interference filters, power factor correction inductors, transformers, and heating elements, with perpendicular orientations of key components to maximize space efficiency and power density, and incorporates an insulating cover and winding hook portion in the transformer for safety and insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If traditional circuit board layout is used, then power output is maintained, but overall volume is large and space utilization is low
Solution Approach 1:
The patent applies three-dimensional spatial arrangement by placing heating elements on the back side of the circuit board while positioning other components on the front side. This vertical layering utilizes the Z-dimension (thickness direction) to reduce the footprint area, thereby decreasing overall volume while maintaining power output capability.
Solution Approach 2:
The patent implements nested arrangement where the shielding element is positioned between the electromagnetic interference filter and both the power factor correction inductor and transformer. This nested configuration allows multiple components to occupy overlapping or adjacent spatial regions, maximizing space utilization and reducing overall adapter volume.
2Power
If component density is increased, then power density improves, but heat dissipation becomes more difficult
Solution Approach 1:
The patent segments high-power generating components (heating elements) and places them on the back side of the circuit board, separated from other components on the front side. This spatial segmentation allows dedicated heat management for high-power components while maintaining high power density through efficient use of board space.
Solution Approach 2:
The patent introduces a shielding element that serves multiple functions: it provides electromagnetic shielding between components and acts as a thermal management intermediary. The shielding element's position between the electromagnetic interference filter and power factor correction inductor helps manage both electromagnetic interference and heat distribution in high-density regions.
3Area of stationary object
If components are placed closer together, then space utilization increases, but electromagnetic interference increases
Solution Approach 1:
The patent positions a shielding element as an intermediary component between the electromagnetic interference filter and sensitive components (power factor correction inductor and transformer). This shielding element acts as a barrier that blocks electromagnetic interference while allowing the components to be arranged in a space-efficient configuration.
Solution Approach 2:
The patent applies localized electromagnetic shielding specifically in regions where high-frequency switching components are positioned close together. The shielding element is strategically placed only where electromagnetic interference is most problematic, allowing other areas to maintain high component density without unnecessary shielding material.
Data Source
AI summary
A power adapter includes a circuit board, an electromagnetic interference filter, a shielding element, a power factor correction (PFC) inductor, a transformer and heating elements. The circuit board has a front side and a back side corresponding to each other, and a first long side and a second long side parallel to each other. The front side of the circuit board is divided into a first region, a second region and a third region along an extending direction of the first long side. The electromagnetic interference filter is disposed in the first region and close to the first long side. The shielding element is disposed in the first region and close to the electromagnetic interference filter. The PFC inductor is disposed in the first region of the circuit board and close to the second long side. The PFC inductor has a first long axis. The transformer is disposed in the third region and close to the first long side. The transformer has a second long axis, and the first long axis is perpendicular to the second long axis. The heating elements are disposed at the back side of the circuit board.