Load switch circuit and control method
US11848667B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 14, 2022 |
| Grant date | Dec 19, 2023 |
| Priority date | — |
| Expiry date | Jun 14, 2042 |
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, the first terminal is configured to receive the power supply voltage, and the second terminal is the output terminal of the load switch circuit and is coupled with an external inductive load; a clamping module including at least a mutually coupled clamping unit and a driving unit; the clamping unit, including a voltage-current converter and a first resistor, the first resistor is coupled between the output terminal of the voltage-current converter and the second terminal of the power transistor, the output terminal of the drive unit is coupled to the control terminal of the power transistor when the difference between the power supply voltage and the output voltage of the power transistor is greater than or equal to the preset clamping threshold, and the clamping unit outputs an effective drive control signal to the driving unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.