USB Device Property Identification Circuit for Charging and Data
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Solution Overview
Problem
Current USB technologies lack efficient methods to determine and regulate USB interface properties for optimal data exchange and charging, leading to suboptimal performance in data transmission and battery charging.
Innovation Solution
A USB device with an interface module, property identification module, data transmission module, and charging module that connects to a USB host to determine interface properties and adjust data exchange and charging currents accordingly, using determination circuits and current modulation to support different USB interface states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If USB device uses complex property identification methods to determine USB interface properties, then data transmission and charging performance are optimized, but device complexity and manufacturing costs increase
Solution Approach 1:
The patent extracts the property identification function from complex control logic and implements it through simple determination circuits that directly detect the voltage levels on data ports. This extraction principle simplifies the overall system by removing unnecessary complexity while maintaining the ability to identify USB interface properties (such as charging-only port vs. data port) and regulate charging currents accordingly.
Solution Approach 2:
The determination circuits automatically detect USB interface properties by monitoring voltage levels on data ports without requiring external control or complex processing. The USB device self-identifies the port type and self-regulates the charging current based on the detected properties, eliminating the need for complex external control mechanisms and reducing overall system complexity.
2Reliability
If USB device uses complex property identification methods to determine USB interface properties, then charging performance is optimized, but manufacturing costs increase
Solution Approach 1:
The patent extracts the essential charging control function from complex property identification systems and implements it through simple determination circuits that detect port properties by monitoring voltage levels. This approach ensures reliable charging performance by correctly identifying charging-only ports versus data ports while using cost-effective simple circuits instead of expensive complex identification systems.
Solution Approach 2:
The patent employs simple, low-cost determination circuits that perform the essential function of USB interface property identification without requiring expensive components. These simple circuits provide sufficient reliability for charging operations at a fraction of the cost of complex identification systems, making the USB device more economically viable for mass production.
3Adaptability or versatility
If USB device uses integrated circuit structure for property identification, then product integration is enhanced, but device complexity increases
Solution Approach 1:
The patent merges the property identification function with the existing data port circuitry by using the same data ports for both data communication and property detection. The determination circuits are integrated into the existing USB interface structure, combining multiple functions (data communication, property identification, charging control) into a unified system that enhances product integration without adding separate complex identification subsystems.
Solution Approach 2:
The determination circuits serve multiple functions: they detect USB interface properties, identify port types (charging-only vs. data ports), and enable appropriate charging current regulation. This multi-functional approach enhances product integration by making the same circuit elements serve multiple purposes, reducing the need for separate dedicated components and simplifying the overall device architecture.
Data Source
AI summary
In one embodiment, a universal serial bus (USB) device can include: (i) an interface module having a power supply port, a ground port, and first and second data ports, where the interface module is configured to connect to corresponding ports of a USB host at a USB interface; (ii) a property identification module coupled to the first and second data ports, where the property identification module is configured to determine properties of the USB interface; (iii) a data transmission module configured to exchange data between the USB device and the USB host according to the determined properties; and (iv) a charging module coupled to the power supply port and the ground port, where the charging module is configured to charge the USB device based on the determined properties.