USB PD Charging Control Using External Power Range Signals
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Solution Overview
Problem
Existing electronic devices face inefficiencies in charging their batteries due to limitations in adapting to the power capabilities of external charging sources, leading to suboptimal charging times and energy utilization.
Innovation Solution
The electronic device includes a processor and charging circuitry that identifies data signals from an external device to adjust charging based on power limits, using USB PD protocols to optimize power reception and delivery, allowing for faster battery charging by dynamically adjusting voltage and current according to the external device's capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the electronic device uses fixed charging parameters, then the charging circuitry is simple to implement, but the charging time is extended and energy utilization is suboptimal
Solution Approach 1:
The charging controller dynamically adjusts charging parameters (voltage and current) based on real-time power range information received from the external electronic device. The processor identifies the power delivery capability through data signals and modifies charging parameters accordingly, transitioning from static to dynamic charging control to improve charging speed while adapting to external device capabilities
Solution Approach 2:
The system implements feedback control by receiving power range information from the external device through data signals, processing this information to determine appropriate charging parameters, and adjusting the charging output accordingly. This closed-loop control ensures optimal charging speed while preventing overload based on the external device's power delivery capability
2Use of energy by moving object
If the electronic device adapts to external device power capabilities, then energy utilization is optimized, but the difficulty of detecting and measuring power limits increases
Solution Approach 1:
The charging controller acts as an intermediary that receives and processes power range information from the external electronic device through standardized data signals. It translates the external device's power capabilities into appropriate charging parameters, simplifying the detection and measurement process while optimizing energy utilization through intelligent parameter adjustment
3Loss of time
If the electronic device uses maximum power from external source, then charging time is reduced, but the risk of exceeding external device power limits increases
Solution Approach 1:
The system changes charging parameters (voltage and current) based on the identified power range of the external electronic device. By adjusting these parameters to match the external device's maximum power delivery capability, the system achieves fast charging while ensuring safe operation within the external device's power limits, preventing overload conditions
Data Source
AI summary
An electronic device includes a port, a battery, charging circuitry, a charging controller, memory storing instructions; and at least one processor. The electronic device identifies, by using the charging controller, a first data signal obtained through the port, obtains, by communicating with an external electronic device connected to the port based on the first data signal, a power signal from the external electronic device. The electronic device obtains, in a state that the battery is charged by the charging circuitry obtaining the power signal, a second data signal from the external electronic device, and controls, based on a parameter which indicates a state of the external electronic device associated with a power limit and is included in the second data signal, the charging circuitry based on at least one of a first power indicated by the first data signal or a second power indicated by the second data signal.