USB Charging Interface Switching for Fast Charge and Device Identification
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing devices such as notebooks and mobile phones face challenges in fast charging due to the lack of support for universal serial bus (USB) interfaces, leading to slow charging speeds when connected to devices like tablets or smartphones, and interference between charging and identification protocols.
Innovation Solution
An electronic device with a charging protocol chip and a switch circuit is introduced, allowing separate electrical connections for a processor and the charging protocol chip, enabling fast charging without interfering with USB 2.0 device identification by controlling the switch circuit based on protocol identification success or failure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a charging protocol chip is added to provide fast charging function, then charging speed is improved, but device complexity increases
Solution Approach 1:
A switch circuit is introduced as an intermediary component to manage the connection between the external interface and both the processor and charging protocol chip. The switch circuit is controlled by a controller to selectively connect the external interface to either the processor or the charging protocol chip based on the type of external device detected, thereby enabling fast charging functionality while maintaining system manageability and avoiding direct interference between the processor and charging protocol chip.
2Adaptability or versatility
If the processor and charging protocol chip are both connected to the external interface, then both USB 2.0 device identification and fast charging are supported, but protocol interference occurs
Solution Approach 1:
The connection configuration between the external interface and the internal components (processor or charging protocol chip) is made dynamic rather than static. The switch circuit is controlled by a controller to selectively connect the external interface to either the processor or the charging protocol chip based on the type of external device detected. This dynamic switching mechanism allows the system to adapt its internal connection configuration according to the external device type, thereby supporting both USB 2.0 device identification and fast charging protocols while preventing protocol interference through temporal separation of their operational states.
3Reliability
If only the processor is connected to the external interface, then USB 2.0 device identification is maintained, but fast charging function is lost
Solution Approach 1:
The external interface is designed with multi-functionality to support both USB 2.0 device identification and fast charging protocols. By introducing a switch circuit that can selectively connect the external interface to either the processor or the charging protocol chip, the system enables the external interface to serve multiple purposes depending on the detected external device type, thereby maintaining both USB 2.0 device identification capability and fast charging functionality without requiring separate dedicated interfaces.
Data Source
AI summary
This application provides an electronic device, a device identification method, and a charging system. The electronic device includes a processor, a controller, a charging protocol chip, an external interface, and a switch circuit. The processor, the charging protocol chip, and the external interface each include a data pin unit. The data pin unit of the processor, the data pin unit of the charging protocol chip, the data pin unit of the external interface, and the controller are separately electrically connected to the switch circuit. The controller is configured to control the switch circuit, so that the data pin unit of the external interface is connected to one of the data pin unit of the processor and the data pin unit of the charging protocol chip and is disconnected from the other of the data pin unit of the processor and the data pin unit of the charging protocol chip.