Multi-Power Delivery Sequencing Using Hot Plug Verification
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Solution Overview
Problem
Existing power delivery methods through power lines or cables are designed for single power supply and lack a mechanism to confirm if a power sink device is connected, potentially leading to dangerous situations when power is supplied without stable connections.
Innovation Solution
A power delivery method and electronic device system that selectively provide multiple power signals, with the first electronic device outputting only a first power signal until a hot plug notification signal is received, then outputting both power signals, ensuring safe delivery and connection verification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If power source directly provides power onto the power line without confirming connection, then power delivery speed is improved, but safety and reliability deteriorate due to potential dangerous situations when terminals are not stably connected
Solution Approach 1:
The system performs preliminary connection verification by detecting hot plug notification signals before enabling full power delivery. The power source first establishes a basic connection state, then waits for confirmation signals indicating stable connection before activating higher power levels, thus preventing dangerous situations while maintaining efficient power transfer.
Solution Approach 2:
The power delivery system dynamically adjusts power levels based on connection status. It transitions from a first power signal during connection verification to multiple power signals including second power signal after hot plug notification is received, allowing the system to adapt power delivery to the actual connection state for both safety and efficiency.
2Reliability
If power source waits to confirm connection before providing power, then safety is improved, but power delivery time increases due to verification delay
Solution Approach 1:
The system performs preliminary connection verification by detecting hot plug notification signals before enabling full power delivery. The power source first establishes a basic connection state, then waits for confirmation signals indicating stable connection before activating higher power levels, thus preventing dangerous situations while maintaining efficient power transfer.
Solution Approach 2:
The system maintains continuous useful action by providing the first power signal throughout the connection verification process. Rather than completely stopping power delivery during verification, the system continues to supply basic power while awaiting hot plug notification, minimizing time loss while ensuring safety before full power activation.
3Device complexity
If existing single power supply design is used, then device complexity is reduced, but adaptability deteriorates as no special power delivery mechanism exists for multiple power signals
Solution Approach 1:
The system implements multi-functionality by enabling a single power line to deliver multiple power signals (first power signal and second power signal) based on connection status. The power source can selectively provide different power levels and types through the same power line, making the system adaptable to various device requirements without adding separate dedicated power lines for each function.
Solution Approach 2:
The system changes power delivery parameters dynamically based on connection verification. It transitions from providing only the first power signal during verification to providing both first and second power signals after hot plug notification, allowing the same power delivery mechanism to adapt to different operational states and device requirements without structural modification.
Data Source
AI summary
An electronic device system includes a first electronic device and a power delivery device. The first electronic device is arranged to selectively provide multiple power signals. The power delivery device is arranged to deliver one or more of the power signals. The power signals at least include a first power signal and a second power signal. When the first electronic device detects that the power delivery device is connected to the first electronic device and before a hot plug notification signal is received, the first electronic device provides only the first power signal to the power delivery device. After the first electronic device has received the hot plug notification signal, the first electronic device provides both the first power signal and the second power signal to the power delivery device.