Overvoltage protection circuits and equipment
By using a combination of normally-on transistors and control circuits in the USB Type-C interface, the problems of complexity and inefficiency in existing overvoltage protection devices are solved, achieving effective overvoltage protection for the device and making it suitable for various charging voltage environments.
CN113161988BActive Publication Date: 2026-05-26INFINEON TECHNOLOGIES AG
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- INFINEON TECHNOLOGIES AG
- Filing Date
- 2021-01-21
- Publication Date
- 2026-05-26
Smart Images
Figure CN113161988B_ABST
Abstract
Overvoltage protection circuits and devices are disclosed. An example relates to an overvoltage protection circuit (10) for use in a device interface (102) suitable for transmitting at least electrical energy. The overvoltage protection circuit (10) includes a first terminal and a second terminal (12, 14) and a normally-on transistor (20). The normally-on transistor (20) is electrically coupled to the first terminal and the second terminal (12, 14). The overvoltage protection circuit (10) also includes a control circuit (30) configured to turn off the normally-on transistor (20) based on at least one of a voltage at the first terminal (12) and a voltage at the second terminal (14). Another example relates to a device (100) including an interface (102) and an overvoltage protection circuit (10). The first terminal (12) of the overvoltage protection circuit (10) is electrically coupled to the interface (102).
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