USB-C Power Sharing Across Multiple Adaptors Using BMC Current Allocation
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Solution Overview
Problem
Existing information handling systems face challenges in efficiently managing power distribution and utilization from multiple USB-C power adaptors, leading to inefficiencies and potential underutilization of available power resources.
Innovation Solution
A baseboard management controller (BMC) in the information handling system determines an average current from multiple USB-C power adaptors and allocates portions of this current to each adaptor, directing them to provide the appropriate current levels based on their power delivery capabilities and system needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multiple USB-C power adaptors are connected to the information handling system, then the available power resources are increased, but the power distribution management complexity increases
Solution Approach 1:
The patent segments the power distribution management by assigning a dedicated BMC (Baseboard Management Controller) to handle power management tasks. The BMC divides the power allocation process into discrete steps: determining average current from multiple adaptors, allocating specific current portions to each adaptor, and directing power delivery. This segmentation reduces the complexity burden on the main system by isolating power management functions in a dedicated controller.
Solution Approach 2:
The BMC acts as an intermediary between the multiple USB-C power adaptors and the information handling system. It receives power input from multiple adaptors, processes the current distribution logic, and coordinates the power delivery to various system components. This intermediary role simplifies the overall system architecture by centralizing the complex power distribution decisions in a dedicated management layer.
2Productivity
If power is allocated based on average current from multiple adaptors, then power distribution efficiency is improved, but the control mechanism complexity increases
Solution Approach 1:
The power distribution system implements self-service by having the BMC automatically determine average current from connected adaptors and autonomously allocate current portions without external intervention. The system monitors its own power intake and distribution needs, making real-time decisions about current allocation based on predefined criteria, thereby improving efficiency while containing control complexity within the autonomous BMC logic.
Solution Approach 2:
The patent employs parameter changes by dynamically adjusting current allocation based on the average current measured from multiple adaptors. The BMC modifies distribution parameters (current portions assigned to each adaptor) in response to changing power conditions, enabling efficient power distribution that adapts to varying operational needs while managing complexity through parameter-based control logic.
3Reliability
If the system uses battery support during peak demand, then power availability is ensured, but energy loss increases
Solution Approach 1:
The system performs preliminary action by proactively distributing power from multiple adaptors before peak demand scenarios occur. By continuously monitoring average current from connected adaptors and pre-allocating appropriate current portions, the system builds power reserves in advance, reducing or eliminating the need to draw from the battery during peak demand periods and thereby minimizing energy loss.
Data Source
AI summary
An information handling system includes first and second USB-C channels and a baseboard management controller (BMC). The first USB-C channel receives power from a first power adaptor, and the second USB-C channel receives power from a second power adaptor. The BMC determines an average current delivered to the information handling system from the first power adaptor and the second power adaptor, allocates a first portion of the average current to the first power adaptor and a second portion of the average current to the second power adaptor, and directs the first power adaptor to provide the first portion of the average current and the second power adaptor to provide the second portion of the average current.