Magnetic SPS Heatsink Assembly for Tool-Less VRM Cooling
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Solution Overview
Problem
Conventional cooling solutions for voltage regulator modules (VRMs) in electronic systems are inefficient, requiring tool-based installation and service, occupying valuable board area, and failing to provide targeted active cooling for transient thermal spikes or persistent hot spots, while traditional SPS solutions complicate design experimentation and fault isolation.
Innovation Solution
A magnetic heatsink assembly with magnetically attachable micro fans and SPS boards that enable tool-less installation, modular replacement, and targeted active cooling, using magnetically shielded structures for stable thermal and electrical interfacing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional screw-based heatsink mounting is used, then secure thermal coupling is achieved, but installation complexity and service time increase
Solution Approach 1:
The patent replaces the mechanical screw-based fastening system with a magnetic attachment system. The heatsink incorporates magnetic elements that provide secure coupling to the VRM module without requiring screws, clips, or other mechanical fasteners. This substitution maintains reliable thermal coupling while enabling tool-less installation and removal, directly resolving the contradiction between secure mounting and ease of service.
2Area of stationary object
If passive heatsink design is used, then board area is minimized, but cooling effectiveness for transient thermal spikes is insufficient
Solution Approach 1:
The patent transitions from a static passive heatsink to a dynamic active cooling system. The heatsink incorporates controllable fans that can be activated based on thermal conditions, enabling the system to respond dynamically to transient thermal spikes and persistent hot spots. This dynamic capability provides targeted active cooling when needed while maintaining a compact form factor, resolving the contradiction between board area and cooling effectiveness.
3Ease of operation
If magnetic elements are added for modular attachment, then ease of assembly is improved, but magnetic interference with nearby circuitry increases
Solution Approach 1:
The patent extracts and isolates the magnetic elements into specific designated zones within the heatsink structure. By confining magnetic elements to specific locations away from sensitive circuitry and using magnetic shielding materials in strategic positions, the design enables easy modular assembly while minimizing magnetic interference with nearby electronic components, thus resolving the contradiction between assembly ease and magnetic interference.
4Reliability
If SPS modules are soldered to PCB, then electrical connection is reliable, but design experimentation and fault isolation are complicated
Solution Approach 1:
The patent segments the power stage into modular SPS units that can be independently attached and detached from the PCB. Each SPS module maintains reliable electrical connections through magnetic contact interfaces while being mechanically separable. This segmentation enables easy design experimentation, rapid prototyping, and simplified fault isolation by allowing individual modules to be swapped without affecting other components, resolving the contradiction between connection reliability and design flexibility.
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
Enables efficient, modular, and flexible thermal management with reduced magnetic interference, supporting rapid swap-in evaluations and stable operation in dense motherboard layouts.
Implementation Method 1
one or more magnet units disposed in or on the heatsink base, each magnet unit defining an exposed attachment face configured to magnetically engage an external module
Implementation Method 2
each magnet unit may be surrounded by a magnetic shield on all non-mating faces while leaving the exposed attachment face uncovered
Implementation Method 3
a heatsink base formed of a thermally conductive material and a plurality of fins that vertically extend from a top surface of the base
Data Source
AI summary
An apparatus and method for thermal management of electronic devices are disclosed. A magnetic heatsink includes a thermally conductive base with vertical fins and one or more shielded magnet units having an exposed attachment face. A subset of fins form fan-receiving groups with inwardly curved extensions and a bottom slot bent upward to create a protruding lip, cooperating to provide lateral guidance and three-way mechanical locking of a micro fan module that also magnetically couples to the heatsink. A Smart Power Stage (SPS) board carries embedded magnet units and a board-to-board interface to magnetically and electrically engage a designated motherboard zone having a metal pad and connector, enabling tool-less installation, self-alignment and efficient heat transfer. Methods of configuring, servicing, and replacing the fan and SPS board are also described.