Connector Heat Transfer Element for QSFP-DD Thermal Management
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Solution Overview
Problem
High-density electronic systems with transceivers, such as those compliant with QSFP and QSFP-DD standards, face challenges in heat dissipation due to increased power consumption, leading to temperature rises that can cause errors and reduce component lifetime.
Innovation Solution
The implementation of a cage system with a heat transfer element and a heat dissipating element, where the heat transfer element is configured to make mechanical and thermal contact with transceivers and transfer heat outside the cage, and the heat dissipating element, often a heat sink, is thermally coupled to dissipate heat effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If transceivers are disposed in close proximity or stacked configuration to increase density, then the quantity of transceivers per unit area increases, but heat dissipation becomes more difficult and temperature rises exceed rated operating limits
Solution Approach 1:
A heat transfer element is introduced as an intermediary component between the transceiver and the external environment. This heat transfer element includes a compressible portion that makes thermal contact with the transceiver and transfers heat to a heat dissipating element, effectively mediating the heat removal process from densely packed transceivers
Solution Approach 2:
The solution moves heat dissipation from a two-dimensional surface level (external heat sinks on cage) to a three-dimensional approach by placing heat transfer elements within the cage structure itself, allowing heat to be extracted from the internal volume where transceivers are densely packed
2Temperature
If heat sinks are mounted to the outside of the cage to dissipate heat, then heat dissipation capability is improved, but the structural complexity and device size increase
Solution Approach 1:
The heat transfer element is merged with the existing cage structure, utilizing the cage's internal space and structural framework. The compressible portion integrates with the cage's geometry, eliminating the need for separate external heat sink mounts and reducing overall structural complexity
Solution Approach 2:
The cage structure serves multiple functions: it provides EMI shielding, structural support, and now also serves as a heat transfer pathway. The heat transfer element utilizes the cage's existing materials and geometry, making the cage a multi-functional component that reduces the need for additional dedicated heat dissipation structures
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 effectively limits the temperature rise of transceivers to less than 25 degrees C, even in ambient environments of 25 degrees C, ensuring reliable operation and extended component lifespan by enhancing heat dissipation capabilities.
Implementation Method 1
a heat transfer element comprising a compressible portion configured to make mechanical and thermal contact with a transceiver inside the first channel
Implementation Method 2
Heat sinks may be mounted to the outside of the cage to further dissipate heat from the transceiver
Data Source
AI summary
A high performance connector that provides heat dissipation sufficient to support operation of high power consuming QSFP-DD transceivers. The connector may be housed in a cage with a first channel to receive a transceiver. A connector port may be aligned with the first channel, and a heat transfer element comprising a compressible portion may make mechanical and thermal contact with a transceiver inside the first channel. The compressible portion may be urged to contact a transceiver by a biasing element. The heat transfer element may be thermally coupled to a heat dissipating element outside the cage. The cage may have multiple channels, and the heat transfer element may be installed in a channel between other channels, each receiving transceivers such that the heat transfer element may receive heat from multiple transceivers.