Systems and methods for sensing current in a power converter
US10389222B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 23, 2017 |
| Grant date | Aug 20, 2019 |
| Priority date | — |
| Expiry date | Aug 24, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/0009
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Systems, apparatuses, and methods for efficiently generating a stable output voltage for one or more components are described. In various embodiments, current sensing circuitry within a power converter includes one or more current mirrors in addition to at least a first resistor, a second resistor, a switch and a bias current source. The sizes of these latter components scales the sensing current output of the current sensing circuitry from a value of an inductor current flowing through the low pass filter output of the power converter. In addition, the sizes generate an offset which maintains the sensing current as a positive value even when the inductor current becomes a negative value. The boosted sensing current makes a zero detection function and a protection function for the power converter relatively simple with current comparisons.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.