Power Management Circuit for Accurate Cable Insertion Detection
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Solution Overview
Problem
Existing electronic devices face issues in accurately determining whether a cable is inserted into a connector, particularly when moisture or foreign materials are present, leading to erroneous insertions and potential corrosion due to incorrect resistance readings.
Innovation Solution
The method employs a power management circuit to generate a signal when power is provided from the cable, transmitting information to a processor to control the path for the cable, allowing for accurate insertion determination without additional hardware, using the power management units to recognize and manage power from the cable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If resistance value sensing is used to detect cable insertion, then cable insertion detection is achieved, but erroneous detection occurs when moisture or foreign material is present
Solution Approach 1:
The patent introduces a power management circuit as an intermediary component between the connector and the processor. This circuit actively manages the detection process by controlling power supply to detection pins and processing resistance measurements, thereby isolating the detection system from environmental interference such as moisture and foreign materials that cause erroneous readings in direct resistance sensing approaches
Solution Approach 2:
The patent changes the detection parameter from simple resistance measurement to a multi-parameter approach involving power supply voltage control and timed measurement windows. By dynamically adjusting power supply states and measuring resistance only during specific time intervals when the connector is in known states, the system achieves accurate cable detection while filtering out spurious signals caused by environmental factors
2Reliability
If additional hardware is installed to improve detection accuracy, then detection reliability is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent makes the power management circuit multi-functional by having it perform both power supply management for the processor and cable insertion detection. The same circuit that regulates power to different components also controls power to detection pins and processes resistance measurements, thereby achieving reliable cable detection without adding dedicated separate hardware for this function
Solution Approach 2:
The patent merges the cable detection function with the existing power management circuitry. Instead of creating a separate detection system, the resistance sensing, power control, and detection logic are all integrated into the power management circuit, reducing overall device complexity while maintaining detection reliability
3Measurement precision
If resistance sensing is used in the connector, then cable insertion can be detected, but connector corrosion occurs due to electric current leakage
Solution Approach 1:
The power management circuit performs preliminary actions by controlling the power supply state before resistance measurement occurs. It ensures that detection pins are properly powered or powered down depending on the detection phase, preventing unintended current flow through the connector that would cause corrosion, while still enabling accurate resistance-based cable detection
Solution Approach 2:
The system implements feedback control where the power management circuit continuously monitors resistance values and adjusts power supply states accordingly. When cable insertion is detected or when resistance values indicate potential issues, the circuit modifies power distribution to prevent harmful current leakage, creating a closed-loop system that protects the connector while maintaining detection capability
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
This approach enables reliable cable insertion detection, preventing corrosion and reducing manufacturing costs by eliminating the need for separate hardware, while maintaining accurate UART port control and reducing circuit design limitations.
Implementation Method 1
a first power manager configured to, when power is provided from the cable, output a signal corresponding to the power
Implementation Method 2
a second power manager configured to transmit information instructing a supplying of the power to a processor
Data Source
AI summary
A method for sensing cable insertion into a connection installed in an electronic device. The electronic device includes a connector for inserting a cable, a first power manager configured to, when power is provided from the cable, output a signal corresponding to the power, a second power manager configured to transmit information instructing a supplying of the power to a processor, in accordance with the output of the signal, and the processor configured to control opening a path for the cable in accordance with the information.