Multi-port Power Delivery Dynamic Budget Allocation
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Solution Overview
Problem
The existing USB Power Delivery (PD) system does not effectively address how to dynamically adjust the power budget for sink devices as their charging status or conditions change, leading to inefficiencies in power allocation and extended charging times.
Innovation Solution
A multi-port USB power delivery system and its associated power allocation method, which utilize a controller to classify the power requirements of sink devices, allocate initial power budgets, and dynamically reallocate power based on monitored average power consumption across connection ports.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the power delivery device uses a fixed power budget allocation method, then the system complexity is reduced, but the charging efficiency deteriorates when sink device power requirements change
Solution Approach 1:
The patent implements dynamic power budget reallocation by continuously monitoring the power consumption status of each sink device and adjusting the power budget allocation in real-time. When a sink device's power consumption changes, the controller dynamically recalculates and redistributes the power budget among active sink devices, transforming the static allocation system into a dynamic one that adapts to changing power requirements.
Solution Approach 2:
The patent establishes a feedback mechanism where the controller monitors the actual power consumption of each sink device and uses this information to adjust the power budget allocation. The system compares the allocated power budget with the actual consumption and makes corrective adjustments, creating a closed-loop control system that optimizes charging efficiency based on real-time feedback.
2Ease of operation
If the power delivery device does not dynamically adjust power budget, then the system operation is simplified, but the charging time increases due to unused power budget shares
Solution Approach 1:
The system dynamically adjusts power budget allocation based on real-time monitoring of sink device power consumption. When a sink device reduces its power consumption or disconnects, the controller automatically reallocates the freed power budget to other active sink devices, ensuring that power resources are continuously optimized and no power capacity is wasted.
Solution Approach 2:
The power delivery device autonomously manages power budget reallocation without requiring manual intervention. The controller automatically monitors power consumption status, calculates optimal allocation, and executes reallocation decisions based on pre-established algorithms, enabling the system to self-optimize its power distribution.
3Ease of manufacture
If the power delivery device allocates power budget evenly across all connection ports, then the allocation simplicity is improved, but the power allocation precision deteriorates for devices with different power requirements
Solution Approach 1:
The patent applies local quality by differentiating power budget allocation based on the specific power requirements of each sink device. Instead of uniform treatment, the system classifies sink devices according to their power needs and assigns appropriate power budgets to each device, ensuring that each connection port receives the precise power allocation matched to its connected device's requirements.
Solution Approach 2:
The system changes the power allocation parameters dynamically based on sink device classification and power consumption status. The controller adjusts voltage, current, and power budget parameters according to the specific needs of each connected device, transforming the fixed allocation parameters into variable parameters that adapt to different operating conditions.
Data Source
AI summary
A multi-port power delivery system and a power allocation method thereof are disclosed. The system comprises a first connection port, a second connection port, and a controller which is configured to monitor the average power of each connection port, and decrease the power budget of the first connection port and increase the power budget of the second connection port when the average power of the first connection port falls below a first threshold, and the average power of the second connection port exceeds a second threshold.