Compact Power Supply Boards for Wireless Devices
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Solution Overview
Problem
Existing power supply boards for wireless communications devices are often bulky and inefficient due to the size and layout of components, which limits their compactness and performance in wireless communication devices.
Innovation Solution
The power supply boards incorporate a compact transformer design with a bobbin and ferrite core configuration, along with a single bent input electrolytic capacitor and surface-mounted Y-capacitor, to reduce size and enhance efficiency, while including protective and filtering components like NTC thermistors, metal oxide varistors, and common-mode chokes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If traditional power supply board designs are used, then power supply functionality is achieved, but the device size becomes bulky and compactness is reduced
Solution Approach 1:
The patent applies three-dimensional mounting techniques where capacitors are mounted vertically on the PCB substrate rather than horizontally, utilizing the vertical dimension to reduce the horizontal footprint. This dimensional transition allows components to be stacked or positioned in multiple layers, significantly reducing the overall board area while maintaining all necessary power supply functions.
Solution Approach 2:
The patent combines multiple power supply components (transformer, capacitors, rectifiers, protective devices) into a highly integrated layout on a single PCB substrate. By merging these components and optimizing their spatial arrangement, the design achieves compactness without sacrificing functionality, allowing all power conversion and protection elements to coexist in a minimized footprint.
2Reliability
If more protective and filtering components are added, then protection against voltage spikes and EMI is improved, but device complexity increases
Solution Approach 1:
The patent implements protective and filtering components strategically at specific locations where they are most effective. For example, TVS diodes are placed directly across AC input lines to clamp voltage spikes, while common-mode chokes are positioned at specific points in the power circuit to filter EMI. This localized approach ensures protection is provided exactly where needed without unnecessarily adding components throughout the entire circuit.
Solution Approach 2:
The patent selects components that perform multiple functions simultaneously. For instance, the common-mode choke serves both as an EMI filter and as part of the power conversion circuitry. The TVS diodes provide both voltage spike protection and clamping functions. This multi-functionality reduces the total component count while maintaining comprehensive protection and filtering capabilities.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration results in a more compact and efficient power supply board that effectively protects against voltage spikes and electromagnetic interference, enabling smaller and more reliable wireless communication devices.
Implementation Method 1
a transformer (116) may include a bobbin and a ferrite core
Implementation Method 2
A negative temperature coefficient thermistor (104) may be configured for limiting inrush current
Implementation Method 3
A metal oxide varistor (106) may be configured for protecting the power supply circuit from high-voltage spikes
Implementation Method 4
A common-mode choke (114) may be configured for filtering high-frequency interferences
Data Source
AI summary
Power supply boards may include a printed circuit board (PCB) substrate including power supply circuitry, an input electrolytic capacitor mounted to the PCB substrate and operably coupled to the power supply circuitry, and a Y-capacitor that may be surface-mounted to the PCB substrate on an opposing side of the PCB substrate from the input electrolytic capacitor. The Y-capacitor may be operably coupled to the power supply circuitry.