Fixed frequency discontinuous conduction mode flyback power converters employing zero voltage switching
US9973098B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 2, 2015 |
| Grant date | May 15, 2018 |
| Priority date | — |
| Expiry date | Oct 2, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power supply system includes a flyback power converter and a control circuit coupled to the flyback power converter. The power converter includes an input, an output, a transformer having a plurality of windings coupled between the input and the output, a first power switch coupled to the transformer and a clamping circuit having a capacitor, a diode, and a second power switch coupled to one of the plurality of windings. The capacitor and the diode are coupled in parallel between the winding and the second power switch. The control circuit is configured to operate the power converter in a discontinuous conduction mode and control the first power switch and the second power switch at a fixed frequency to achieve substantially zero voltage switching during turn on of the first power switch. Various other example power supply systems, power converters, and methods for controlling a power converter are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.