Multi-Source Charging Circuit With Selective Current Limiting
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Solution Overview
Problem
Power supply circuits often receive input currents with varying values, leading to excessive current supply, unnecessary power consumption, and potential damage to electronic devices due to overcurrent.
Innovation Solution
A power supply circuit with a current control mechanism, comprising a charging driver, input current processing circuits, and a control circuit, which selects and controls input currents based on external control parameters, allowing for current regulation without modifying the integrated circuit package.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the power supply circuit receives multiple input currents with different current values, then the power supply circuit can accommodate various power sources, but the power supply circuit cannot select appropriate input current, leading to excessive current supply and potential device damage
Solution Approach 1:
The patent changes the parameter of current selection by detecting the current values of multiple input power sources and selectively connecting the appropriate one to the charging circuit. The control circuit monitors current parameters and switches between different input currents based on detected values, ensuring safe operating ranges while maintaining compatibility with various power sources.
Solution Approach 2:
The patent introduces an intermediary control circuit that acts as a mediator between multiple input power sources and the charging circuit. This control circuit detects current values from different power sources and selectively connects the appropriate one, preventing direct connection of incompatible power sources that could cause overcurrent damage.
2Productivity
If the power supply circuit supplies excessive currents to the electronic device, then the charging speed may be increased, but the electronic device may be damaged due to overcurrent
Solution Approach 1:
The patent implements a feedback mechanism where the control circuit continuously detects the current values from multiple input power sources and adjusts the selection accordingly. By monitoring current parameters in real-time and providing feedback to the switching control, the system ensures that only safe current levels are supplied to the charging circuit, preventing overcurrent damage while maximizing charging speed within safe limits.
3Adaptability or versatility
If the power supply circuit uses a current control mechanism with multiple switch components, then the current selection capability is improved, but the circuit complexity increases
Solution Approach 1:
The patent segments the current selection function into multiple independent switch components, each controlled by the control circuit. This segmentation allows the system to handle multiple input power sources independently and selectively connect them to the charging circuit. While this increases component count, it provides precise control over current selection and maintains modularity in the circuit design.
Data Source
AI summary
A power supply circuit having a current control mechanism is provided. The power supply circuit includes a charging driver, a plurality of input current processing circuits, a charging circuit and a control circuit. The charging driver includes a plurality of switch components and a driver circuit. The control circuit controls the plurality of input current processing circuits respectively to switch the plurality of switch components. At least one of a plurality of input currents that are supplied by a plurality of external input power sources flows to the driver circuit through at least one of the plurality of switch components. The driver circuit transmits the at least one of the plurality of input currents to the charging circuit, and drives the charging circuit to use the at least one of the plurality of input currents to charge an electronic device.