USB Charger Circuit Dynamic Current Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Standard USB sockets and cables have limited over-current capability, restricting the maximum charging current and hindering fast charging capabilities in smart mobile terminals.
Innovation Solution
A charger and mobile terminal charging circuit design that includes a voltage conversion circuit and control circuits to dynamically manage current flow through data transmission paths, allowing for increased charging current without altering existing cable standards by switching between control states for normal and quick charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If standard USB socket and cable are used, then compatibility and ease of operation are maintained, but charging current is limited and fast charging cannot be achieved
Solution Approach 1:
The data transmission pins in the USB interface are made multi-functional by enabling them to carry both data signals and charging current. The control circuit dynamically switches the function of these pins between data transmission and power delivery based on charging requirements, allowing standard USB interfaces to provide fast charging capability without sacrificing compatibility
Solution Approach 2:
The USB interface configuration is made dynamic through a control circuit that can switch between different operational states. The data transmission pins are dynamically reconfigured from data-only mode to dual-mode (data and power), allowing the system to adapt charging current based on real-time requirements while maintaining standard interface compatibility
2Power
If data transmission paths are reused for current flow, then charging current increases and fast charging is enabled, but circuit complexity increases
Solution Approach 1:
A control circuit acts as an intermediary between the voltage conversion circuit and the USB interface pins. This intermediary manages the switching and routing of current, coordinating between data transmission requirements and power delivery needs, thereby enabling fast charging while maintaining organized and controllable circuit architecture
Solution Approach 2:
The control circuit automatically detects charging requirements and switches the USB interface pins between data transmission mode and power delivery mode without manual intervention. The system self-manages the complex routing logic, determining when to use data pins for power based on voltage conversion circuit state and charging demands, reducing the need for additional complex control mechanisms
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
Enables quick charging by reusing data transmission paths for current flow, thereby increasing the total charging current without changing the existing cable standard, improving user experience by reducing charging time.
Implementation Method 1
a voltage conversion circuit configured to convert an alternating current into a direct current
Data Source
AI summary
The present disclosure provides a charger charging circuit, a mobile terminal charging circuit, a charger and a mobile terminal. The charger charging circuit includes: a voltage conversion circuit configured to convert an alternating current into a direct current and be connected with an alternating current charging power supply; a first charging interface configured to be connected with a second charging interface of a mobile terminal, where the first charging interface includes a voltage output end coupled with the voltage conversion circuit and a plurality of first data transmission ends; and a first control circuit. An end of the first control circuit is coupled with the voltage conversion circuit; and another end of the first control circuit is coupled with at least one of the first data transmission ends.