Switched-mode power supply with low switching losses
US6587361B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 15, 2002 |
| Grant date | Jul 1, 2003 |
| Priority date | — |
| Expiry date | Mar 15, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/0038
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for driving a switch in a switched-mode power supply, in which the switch is connected in series with a primary coil of a transformer and in which a control signal dependent on an output voltage is available. In this case, reference instants at which a voltage present across the switch corresponds to a first reference voltage value or at which a voltage present across the primary coil corresponds to a second reference voltage value are detected and counted, the switch being closed again only after the number of detected reference instants has reached a comparison numerical value. The invention furthermore relates to a switched-mode power supply for realizing the method according to the invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.