Inrush current limiter circuits and methods of limiting inrush current in a circuit
US11114844B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 19, 2019 |
| Grant date | Sep 7, 2021 |
| Priority date | — |
| Expiry date | Sep 9, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/156
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A DC-DC power converter includes an input, an output, a power circuit coupled between the input and the output to convert a voltage of a DC power received at the input to a different voltage of a DC power supplied at the output, and a control circuit. The DC-DC power converter also includes a resistor coupled in an input current path to receive an inrush current from the input, a switch coupled in parallel with the resistor to selectively bypass the resistor, and a transistor coupled to control the switch in response to a voltage across the resistor. The transistor is coupled to open the switch when the voltage across the resistor is above a specified inrush threshold to permit current flow through the resistor, and to close the switch when the voltage across the resistor is below the specified inrush threshold to bypass the resistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.