VRM Heat Sink Extraction for Noise and Thermal Management
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Solution Overview
Problem
As electronic circuits, such as Voltage Regulator Modules (VRMs), move towards higher frequencies and miniaturization, the proximity to processors increases parasitic noise interference and heat dissipation becomes a critical issue, affecting processor operations.
Innovation Solution
The design incorporates a circuit board with electronic devices on the top surface, a power inductor on the bottom, and wave pins with recesses on the bottom surface, along with a heat sink and electroplated metal layers for enhanced heat dissipation, and uses insert-molded pins for electrical connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the VRM is moved closer to the processor to reduce parasitic noise interference, then noise interference is reduced, but heat dissipation becomes a critical issue affecting processor operations
Solution Approach 1:
The heat sink is extracted as a separate component from the VRM module, allowing the VRM to be positioned close to the processor while the heat dissipation function is handled by the dedicated heat sink that can be optimally positioned and designed without constraining the VRM layout
Solution Approach 2:
The heat sink acts as an intermediary between the VRM and the surrounding environment, absorbing heat from the VRM and dissipating it away from the processor, thus enabling close proximity mounting while protecting the processor from thermal effects
2Volume of moving object
If the VRM is miniaturized to reduce size, then space is saved, but heat dissipation capability is reduced
Solution Approach 1:
The heat dissipation function is extracted from the VRM body and assigned to a separate heat sink component, allowing the VRM itself to be miniaturized while the heat sink provides adequate heat dissipation surface area and capability
Solution Approach 2:
The heat sink extends the heat dissipation solution into the vertical dimension and utilizes the z-axis space, allowing the VRM footprint on the circuit board to be minimized while heat dissipation surface area is increased through the heat sink's three-dimensional structure
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 enables a smaller-sized VRM with improved heat dissipation capabilities, minimizing the impact on adjacent components like processors and reducing noise interference.
Implementation Method 1
a heat sink is disposed over the plurality of electronic devices
Implementation Method 2
for dissipating heat generated by the first MOSFET and the second MOSFET
Implementation Method 3
a metal layer is electroplated on a top surface of the first MOSFET and a top surface of the second MOSFET, for dissipating heat generated by the first MOSFET and the second MOSFET
Implementation Method 4
an inductor, is disposed on a bottom surface of the circuit board; wherein the inductor is electrically connected to a wave pin
Data Source
AI summary
An electronic module, such as a VRM, has a power inductor and power wave pins disposed on a bottom surface of a circuit board so as to reduce the size and increase the heat dissipation capability of the VRM.