Overcurrent protection circuit for composite transistor devices
US11870430B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 20, 2021 |
| Grant date | Jan 9, 2024 |
| Priority date | — |
| Expiry date | Jul 20, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/567
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An over-current protection circuit for composite transistor devices is provided, connected between an input terminal and a load, and including: a control-terminal voltage-generation module whose output voltage varies with its input voltage when driven by a first voltage, wherein the output voltage of the control-terminal voltage-generation module serves as a control-terminal voltage; a composite transistor device, connected between the control-terminal voltage-generation module and the load, configured to conduct in response to the control-terminal voltage and a second voltage to generate an output current flowing through the load; and an over-current protection module, connected between the composite transistor device and the load, wherein when the output current of the composite transistor device exceeds a preset limit, a clamping voltage is applied to the composite transistor device by the over-current protection module to limit a current flowing through the composite transistor device, thereby limiting the output current of the composite transistor device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.