Dynamic bias technique for enhanced MOSFET on-resistance based current sensing
US11489445B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 8, 2020 |
| Grant date | Nov 1, 2022 |
| Priority date | — |
| Expiry date | Feb 12, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M7/4837
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A switching converter circuit comprises an inductive circuit element; a driver switching circuit configured to provide energy to the inductive circuit element to generate an output voltage of the switching converter circuit, the output voltage having an alternating current (AC) signal component and a direct current (DC) signal component; a current sensing circuit configured to generate a current sense signal representative of inductor current of the inductive circuit element, wherein an output of the current sensing circuit is coupled to a bias circuit node; and a dynamic bias circuit configured to apply a dynamic bias voltage to the bias circuit node, wherein the dynamic bias voltage includes an AC component that tracks the AC signal component of the output voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.