Load switch circuit and control method
US11394382B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 2, 2020 |
| Grant date | Jul 19, 2022 |
| Priority date | — |
| Expiry date | Dec 2, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/74
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A load switch circuit includes a power transistor. A first terminal is configured to receive a power supply voltage, and a second terminal is the output terminal of the load switch circuit and is coupled with an external inductive load. A clamping module includes at least a mutually coupled clamping unit and a driving unit. The clamping unit includes a voltage-current converter and a first resistor, the first resistor coupled between the output terminal of the voltage-current converter and the second terminal of the power transistor. The positive input terminal of the voltage-current converter receives the power supply voltage, and the negative input terminal is coupled to the second terminal of the power transistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.