Patent · US Active

Method of controlling a PFC stage operating in boundary conduction mode, a PFC stage, and an SMPS

US8599579B2 · kind B2 · utility

6Cited by

3References

8Claims

0Family size

Assignee

NXP B.V. · NL

Inventors

Johann Baptist Daniel Kuebrich · Saalfeld, DE
Thomas Duerbaum · Eschweiler, DE
Hans Halberstadt · Groesbeek, NL

Key dates

Filing date	Nov 30, 2010
Grant date	Dec 3, 2013
Priority date	—
Expiry date	Nov 21, 2031

Classification

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

Abstract

Consistent with an example embodiment, there is a control method which reduces the steps: instead of a constant on-time for the switch, the duration of the on-time is increased each time an additional valley to be skipped. The predetermined increase may be either a fixed fractional increase or a further additional increment; it may be determined by a small regulation loop that multiplies the on-time from the main loop with a factor equal to the ratio between measured period time and the sum of primary and secondary stroke times.

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