Patent · US Active

Switched-mode power conversion

US9941798B2 · kind B2 · utility

1Cited by

2References

30Claims

0Family size

Assignee

Infineon Technologies Austria AG · AT

Inventors

Martin Krueger · Roseville, US
Marc Fahlenkamp · Geretsried, DE
Torsten Hinz · Neuss, DE

Key dates

Filing date	Feb 3, 2015
Grant date	Apr 10, 2018
Priority date	—
Expiry date	Dec 24, 2035

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02B70/10
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

In accordance with an embodiment, a method of operating a switched-mode power converter includes defining at least one of a minimum switching frequency threshold and a maximum switching frequency threshold; detecting valleys occurring in a voltage over the switching element when the switching element is in an off-state; and either in a quasi-resonant mode, switching the switching element on when an nth consecutive valley occurs, n being an integer equal to or greater than one, so that the actual switching frequency is at least one of: below the maximum switching frequency threshold and above the minimum switching frequency threshold, or in a forced switching frequency mode, switching the switching element on so that the actual switching frequency is the maximum or the minimum switching frequency.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.