Dual-Source Power Path Switching With Adaptive Voltage Conversion
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Solution Overview
Problem
Existing power supply control circuits fail to effectively manage multiple power sources, leading to decreased performance when multiple power adapters are connected, particularly with newer USB-PD adapters providing higher power than legacy AC adapters.
Innovation Solution
An electronic device with multiple power feed ports, switching circuits, and a control system that dynamically switches power paths based on voltage and power comparisons, ensuring high-power paths are utilized, and includes additional checks for load conditions and battery state to prevent unintended power discontinuity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a power supply control circuit is designed to handle multiple power sources, then the system can utilize higher power adapters, but the circuit complexity increases and performance degradation occurs when multiple adapters are connected simultaneously
Solution Approach 1:
The power supply control circuit is divided into multiple independent control modules, each responsible for a specific power feed path. Each module includes its own switching circuit and control logic, allowing parallel processing of multiple power sources without increasing overall system complexity. The segmentation enables modular design where each path can be managed independently.
Solution Approach 2:
The power supply control circuit employs dynamic voltage comparison and adaptive switching mechanisms. The control device continuously monitors voltages from multiple power sources and dynamically adjusts switching decisions based on real-time conditions. This dynamic approach allows the system to adapt to varying power adapter specifications and prevent performance degradation through real-time optimization.
2Ease of operation
If voltage comparison switching is implemented between power paths, then power path switching can be achieved, but performance decreases when multiple power adapters are connected due to inadequate power management
Solution Approach 1:
The control device implements a feedback mechanism that continuously monitors the output voltage of the step-up/down circuit and compares it with the input voltage from power adapters. Based on this feedback, the control device adjusts the switching decisions to ensure optimal power utilization. The feedback loop prevents performance degradation by maintaining proper voltage levels and power flow management.
Solution Approach 2:
The system changes operating parameters dynamically by adjusting voltage levels through the step-up/down circuit based on the connected power adapter's characteristics. When a higher power adapter is detected, the system modifies voltage parameters to充分利用 the available power capacity. This parameter adaptation enables the system to maintain high performance across different power source configurations.
3Stability of the object's composition
If a step-up/down circuit is added to the second power path, then voltage matching can be achieved, but the device complexity and potential performance issues increase when multiple adapters are connected
Solution Approach 1:
The step-up/down circuit serves as an intermediary component between the second power feed path and the switching circuit. It mediates voltage differences by transforming the voltage level to match system requirements before the power is routed to the load. This intermediary function ensures voltage stability while isolating the complexity of voltage transformation from the main switching logic.
Solution Approach 2:
The step-up/down circuit is designed to handle multiple functions: voltage step-up, voltage step-down, voltage regulation, and power isolation. By consolidating these functions into a single multi-functional component, the overall device complexity is reduced compared to using separate circuits for each function. The universal design allows the same component to serve different purposes based on the connected power adapter's characteristics.
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
Prevents performance degradation by reliably switching to high-power paths and avoids unintended power disruptions, ensuring stable operation even with multiple adapters connected.
Implementation Method 1
a step-up/down circuit that is arranged between the second power feed port and the first switching circuit in the second path and raises or lowers a voltage of the second power
Data Source
AI summary
An electronic device includes a first switching circuit switching a power feed path between a first path for supplying first power and a second path for supplying second power, and a step-up/down circuit changing a voltage of the second power. The first switching circuit switches the power feed path to the first path when a voltage of the first path is higher than a voltage of the second path, and switches the power feed path to the second path when a voltage of the second path is higher than a voltage of the first path. The step-up/down circuit makes the voltage of the second power lower than a voltage of the first power when the first power is larger than the second power, and makes the voltage of the second power higher than the voltage of the first power when the second power is larger than the first power.