Connector Impedance Tracking for Mobile Power and Temperature Control
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Solution Overview
Problem
Conventional power management techniques fail to account for the dynamic nature of connector impedance, leading to inefficient power management and potential safety hazards in mobile devices due to temperature fluctuations and impedance variations in connectors.
Innovation Solution
Implementing impedance tracking methods to separately determine the impedance of the connector and the source in mobile devices, using different time constants for each, to improve power estimation and control, thereby enhancing safety and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional power management techniques are used that do not account for dynamic connector impedance, then the system is simpler to implement, but power management efficiency deteriorates and temperature control worsens
Solution Approach 1:
The total impedance is segmented into two distinct components: connector impedance and source impedance. The system separately tracks connector impedance (Z_connector) and source impedance (Z_source) using different time constants, allowing independent optimization of each component's tracking accuracy and response speed.
Solution Approach 2:
The system implements dynamic impedance tracking that adapts to changing operating conditions. Different time constants are used for tracking connector impedance versus source impedance, enabling the system to respond dynamically to rapid connector temperature changes while maintaining accurate long-term source impedance characterization.
2Reliability
If connector impedance is not tracked separately, then the measurement system is simpler, but temperature monitoring accuracy and safety deteriorate
Solution Approach 1:
The impedance measurement system is segmented to separately identify and track connector impedance and source impedance. This segmentation enables independent monitoring of each component's thermal state, improving reliability by detecting abnormal temperature rises in the connector that would otherwise be masked by aggregate impedance measurements.
3Measurement precision
If a single time constant is used for impedance tracking, then the tracking algorithm is simpler, but accuracy in capturing rapid temperature changes deteriorates
Solution Approach 1:
Different time constants are applied to different impedance components based on their local characteristics. Connector impedance tracking uses a shorter time constant to capture rapid local temperature changes, while source impedance tracking uses a longer time constant appropriate for slower thermal dynamics. This local quality approach optimizes measurement precision for each component's specific thermal behavior.
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
Accurate impedance tracking reduces signal-to-noise ratio requirements, improves fault detection, and ensures safer operation by preventing overheating and prolonging battery life in mobile devices.
Implementation Method 1
Electrical systems generate heat when current passes through resistances. The impedance of the connector, such as the flex connector, also affects the temperature and power consumption within the electronic system, and the impedance of the flex connector varies based on factors such as current and temperature.
Implementation Method 2
Electrical systems generate heat when current passes through resistances. The heat causes an increase in temperature in the electrical system if the dissipation capacity is less than the generated heat.
Data Source
AI summary
The impedance of a connector, such as a flex cable, between a source and load affects the temperature and power consumption within an electronic system, such as a mobile device. According to embodiments described in this disclosure, the impedance of the flex cable may be separately tracked from the impedance of the source, which provides for improved power management within the electronic system. The impedance of the flex cable may be factored into determining a maximum available power to the load. The impedance of the flex cable may also be mapped to a temperature and used to manage power to maintain operation within temperature limits. Additional aspects of power management and impedance tracking for a connector are described herein.