Adapter Power Negotiation for Faster Third-Party Device Charging
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Solution Overview
Problem
Handheld electronic devices often come without power adapters, leading to the use of third-party adapters that may not provide optimal charging capabilities, resulting in subpar user experiences due to inconsistent or inadequate charging wattage.
Innovation Solution
An electronic device with a battery module, charger IC, and processor that negotiates with a power adapter using a power control protocol to determine its capabilities and performs tests to select the most suitable power supply algorithm, optimizing charging based on the adapter's support for variable or fixed power adjustment functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If power adapters are not included with handheld electronic devices, then device portability and manufacturing cost are improved, but charging compatibility and charging speed deteriorate
Solution Approach 1:
The system performs preliminary negotiation and testing actions before actual charging. The processor negotiates with the power adapter through a power control protocol to obtain a power profile, determines whether the adapter supports variable charging power adjustment, and executes tests (constant current test, constant voltage test, or power transmission test) to select the most suitable charging algorithm. This preliminary characterization enables the system to adapt to third-party adapters without including original adapters with the device.
Solution Approach 2:
The system dynamically changes charging parameters based on adapter capabilities. By determining whether the power adapter supports variable charging power adjustment function and selecting different charging algorithms (constant current, constant voltage, or power transmission) based on test results, the system optimizes charging parameters to achieve maximum charging speed with any compatible adapter, resolving the compatibility issue.
2Adaptability or versatility
If third-party power adapters are used, then consumer choice and cost are improved, but charging wattage capability and charging speed deteriorate
Solution Approach 1:
The system implements a feedback mechanism where the processor continuously monitors power adapter performance during tests and adjusts charging parameters accordingly. By executing constant current tests, constant voltage tests, or power transmission tests and selecting algorithms based on actual adapter response, the system ensures maximum charging wattage capability is achieved with third-party adapters, matching or exceeding original adapter performance.
3Adaptability or versatility
If multiple charging algorithms are implemented, then charging adaptability and charging speed are improved, but system complexity increases
Solution Approach 1:
The system dynamically selects charging algorithms based on real-time adapter characteristics. The processor executes different tests (constant current, constant voltage, or power transmission) and selects the most suitable charging algorithm from multiple options based on adapter performance. This dynamic adaptation achieves high charging adaptability while keeping the control logic manageable through a clear test-and-select framework.
Data Source
AI summary
An electronic device and a power supply optimization method thereof are provided. The method includes: negotiating with a power adapter through a power control protocol in a power connection state to obtain a power profile; determining whether the power adapter supports a variable charging power adjustment function according to the power profile; when the power adapter supports the variable charging power adjustment function, determining whether a stored power of a battery module is less than a power threshold; when the stored power is less than the power threshold, executing one or more of a constant current test, a constant voltage test, and a power transmission test to select an algorithm for controlling a power supply behavior of the power adapter from multiple algorithms.