Light-load efficiency improving method and apparatus for a flyback converter
US7609533B2 · kind B2 · utility
18Cited by
6References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 3, 2007 |
| Grant date | Oct 27, 2009 |
| Priority date | — |
| Expiry date | Apr 28, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A flyback converter has a controller to switch a power switch so as to convert an input voltage to an output voltage for a load by monitoring an output voltage dependent signal and a current sensing signal derived from a current flowing through the power switch, a light-load efficiency improving apparatus monitors the load and a supply voltage provided for the controller to selectively clamp the output voltage dependent signal when the load is lower than a first threshold value and the supply voltage is lower than a second threshold value, so as to increase the supply voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.