Adaptive pulse width control power conversation method and device thereof
US8274270B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 16, 2009 |
| Grant date | Sep 25, 2012 |
| Priority date | — |
| Expiry date | Feb 16, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K7/08
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An adaptive pulse width control power conversion device includes a pulse width adjustable pulse frequency module (PFM) control circuit, a pulse width modulation (PWM) control circuit, a PWM/PFM switching unit, a switching circuit, and a load status detection circuit. When the power conversion device is to be switched from a PWM mode to a PFM mode, pulse width of a series of PFM control signals is sequentially adjusted from a low value to a high value according to a predetermined pulse width increment until an optimum pulse width is determined and thereafter, an output voltage is supplied to a load in the PFM mode, whereby ripple of output voltage in the PFM mode can be improved and improved stability of output of the power conversion device is realized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.