Switching power supply and method of controlling voltage induced across secondary winding of transformer
US6137698A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 1998 |
| Grant date | Oct 24, 2000 |
| Priority date | — |
| Expiry date | Sep 29, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/33576
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A switching power supply has a secondary rectifying circuit including two MOS transistors which can operate in a third quadrant for use as low-loss rectifying devices. While the MOS transistors are operating in the third quadrant, the application of a gate voltage to the MOS transistors is forcibly stopped to turn off the MOS transistors. Periods in which the MOS transistors operate in the third quadrant are prevented from overlapping each other. The periods in which the MOS transistors operate in the third quadrant may be established by an ON timer, and the periods in which the MOS transistors remain de-energized may be established by an OFF timer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.