Patent · US Active

PFM control method for boost converters

US11264900B2 · kind B2 · utility

0Cited by

5References

20Claims

0Family size

Assignee

Apple Inc. · US

Inventors

Bogdan-Eugen Matei · Westerndorf, DE
Alessandro Molari · Eichenau, DE
Fabio Ongaro · Munich, DE
Giovanni Saccomanno · Munich, DE
Hao Zhou · Evanston, US

Key dates

Filing date	Feb 18, 2020
Grant date	Mar 1, 2022
Priority date	—
Expiry date	Aug 11, 2040

Classification

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

Abstract

The present disclosure is directed to a pulse frequency modulation (PFM) control method for a boost converter and apparatus for carrying out the method. A boost converter includes an inductor and a transistor coupled thereto. A control circuit is arranged to control the transistor to cause current pulsed to be sourced through the inductor. When operating in a PFM mode, the control circuit may control the timing of pulses such that, at the beginning of a specified time period, current pulses may be sourced with no spacing between successive pulses. After a desired number of pulses have been sourced, no pulses are sourced for the remainder of the specified time period. Nevertheless, the number of pulses sourced over the time period corresponds to a desired average frequency of pulses.

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