Circuit for preventing overcurrent protection of data line interface and electronic device

By introducing a switching component into the electronic device and using the GPIO of the main control unit to control the power supply and charging unit of the data line interface, the problem of overcurrent protection of the USB interface is solved, and low-cost and convenient communication and data exchange are achieved.

CN224305398UActive Publication Date: 2026-05-29HEFEI IFLYTEK TOYCLOUD TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
HEFEI IFLYTEK TOYCLOUD TECH
Filing Date
2025-05-19
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

In existing technologies, when using a USB interface to connect a device, the charging current demand exceeds the maximum power supply current of the computer's USB port, causing overcurrent protection and resulting in the inability to supply power and communicate. Furthermore, existing solutions are costly and have complex connections.

Method used

By introducing a switching component into the electronic device, the power supply pins of the data line interface and the charging unit are controlled by the GPIO pins of the main control unit, thus avoiding overcurrent protection and enabling communication and data exchange.

Benefits of technology

Without using additional equipment, communication and data exchange are achieved when the charging current demand exceeds the maximum power supply current of the USB port, reducing costs and simplifying connection operations.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a kind of circuit and electronic equipment for preventing data line interface overcurrent protection, it is related to electronic circuit technical field, the circuit is applied to electronic equipment, the switch component between the power supply pin and charging unit of the first data line interface connected to electronic equipment, the power supply pin and charging unit between the first data line interface are controlled to be on-off, and then in the case where the charging demand current of electronic equipment exceeds the maximum power supply current that the second data line interface of target device can provide, if electronic equipment needs to communicate and data exchange with target device, it can be avoided that the second data line interface triggers overcurrent protection mechanism by the level signal output by main control unit, and communication and data interaction between main control unit and target device can be realized. The circuit does not need to use USB Hub with independent power supply or install USB isolator, realizes lower cost, and connection relationship is simple, easy to operate, and reduces the difficulty of realization.
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