Charging Port Detection Control for USB Noise Reduction
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Solution Overview
Problem
Portable electronic devices with USB ports face issues such as noise and unwanted leakage current due to improper control during high-speed USB signaling and charging, necessitating enhanced USB port control methods.
Innovation Solution
A method and apparatus for charging port detection control in electronic devices, involving a charger module to detect battery voltage thresholds, connect the communication port to a charging port detection circuit, and regulate system voltage to enable proper charging port detection, using a detection path switching unit and a charging port detection circuit to manage electrical connections and power supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If charging port detection is performed without proper voltage level control, then the detection process can be initiated immediately, but noise and leakage current occur due to improper control
Solution Approach 1:
The patent applies preliminary action by performing voltage level preparation and power source activation before initiating charging port detection. The system first raises the battery output voltage to a first predetermined level and activates the power source, then proceeds with detection only when voltage conditions are met, preventing noise and leakage current from the outset
Solution Approach 2:
The patent changes voltage parameters as a prerequisite for detection. It monitors battery output voltage and system voltage, raising them to predetermined levels before enabling detection. This parameter-based control ensures that detection occurs only under proper electrical conditions, eliminating noise and leakage current issues
2Productivity
If voltage thresholds are not monitored before detection, then the detection can proceed without delay, but the USB port control compliance with standards deteriorates
Solution Approach 1:
The patent implements feedback control by continuously monitoring battery output voltage and system voltage against predetermined thresholds. The detection process is conditionally enabled based on this feedback, ensuring that USB port control complies with BC1.1 and BC1.2 standards while maintaining efficient operation
3Use of energy by moving object
If the battery voltage is low during detection, then the device can operate with limited power, but proper charging port detection cannot be performed
Solution Approach 1:
The patent performs preliminary voltage raising action by activating the power source and raising battery output voltage to a first predetermined level before attempting detection. This ensures sufficient voltage for accurate detection while managing power consumption through conditional power source activation
Solution Approach 2:
The patent changes the battery output voltage parameter to a predetermined level as a prerequisite for detection. By monitoring and adjusting voltage parameters before detection, the system ensures accurate charging port detection while efficiently managing power consumption
Data Source
AI summary
A method and an apparatus for performing charging port detection control are provided, where the method is applied to an electronic device, and a communication port of the electronic device has a functionality of obtaining power from an external power source for the electronic device. The method may include the steps of: detecting whether an output voltage level of a battery of the electronic device reaches a predetermined threshold value; and control operation(s) according to whether the output voltage level reaches the predetermined threshold value. For example, the method may include: when it is detected that the output voltage level is less than the predetermined threshold value, pre-charging the battery with a predetermined pre-charging current level to make the output voltage level reach the predetermined threshold value, and then controlling a detection path switching unit to electrically connect data terminal(s) of the communication port to a charging port detection circuit.