Switching power converter with primary-side dynamic load detection and primary-side feedback and control
US9184667B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 11, 2013 |
| Grant date | Nov 10, 2015 |
| Priority date | — |
| Expiry date | Jan 4, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/33523
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A switching power converter provides regulated voltage to a load. The switching power converter comprises a transformer including a first primary winding coupled to an input voltage, a second primary winding, a secondary winding coupled to an output of the switching power converter, and an auxiliary winding, a first switch coupled to the first primary winding, and a second switch coupled to the secondary primary winding. A controller generates a first control signal to turn the first switch on or off at a first switching frequency, and a second control signal to turn the second switch on or off at a second switching frequency that is higher than the first frequency. During off cycles of the switches, feedback voltage representing the output voltage of the power converter is generated across the auxiliary winding. The controller controls switching of the first switch to regulate the output voltage based on the feedback.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.