Charging Path Switch Circuit for Concurrent USB Data and Power
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Solution Overview
Problem
Portable electronic devices with a single USB interface face limitations where simultaneous data transmission or OTG function and battery charging/discharging are mutually exclusive, restricting their functionality.
Innovation Solution
A charging path switch circuit with a control unit and switch units that selectively connect to either an external electronic device or a power source, allowing for automatic path selection based on connection status, enabling simultaneous data exchange and charging through a USB interface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single USB interface is used for multiple functions, then the device complexity is reduced, but the functionality cannot be performed simultaneously
Solution Approach 1:
The patent implements dynamic path switching within the USB interface, allowing the connection path to change based on operational requirements. The switch circuit dynamically routes signals between different functional paths (charging path vs. data/OTG path) enabling the single interface to adapt between different functions without physical reconfiguration, thus achieving concurrent functionality while maintaining interface simplicity
2Productivity
If the USB interface is used for data transmission or OTG function, then data exchange capability is improved, but battery charging function is lost
Solution Approach 1:
The patent segments the USB interface into distinct functional paths: a charging path and a data/OTG path. The switch circuit separates these functions into different signal routes, allowing independent control of each path. When data transmission is required, the switch redirects signals to the data path while blocking the charging path, and vice versa, enabling efficient data transfer without interfering with charging functionality
3Use of energy by moving object
If the USB interface is used for battery charging, then power transfer is improved, but data transmission and OTG functions are lost
Solution Approach 1:
The system dynamically switches between charging mode and data/OTG mode based on detected requirements. The control unit monitors connection status and operational needs, then activates the appropriate path through the switch circuit. This dynamic reconfiguration allows the interface to maximize charging efficiency when power transfer is needed, while seamlessly transitioning to data transmission mode when communication is required
Data Source
AI summary
A charging path switching circuit includes a first port, a second port, a path switch unit, and a conversion unit. The first port is connected to an external electronic device to obtain a first electrical signal. The second port is connected to an external power source to obtain a second electrical signal. The conversion unit is connected the path switch unit and converts the first electrical signal or the second electrical signal to a predetermined voltage. The path switch unit is connected to the first port and the second port. The path switch unit selects to connect to the first port or the second port, to obtain the first electrical signal or the second electrical signal according to the connection of the first and the second port. The path switch unit preferentially selects to obtain the second electrical signal from the second port.