Method and apparatus to control two regulated outputs of a flyback power supply
US7675761B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 1, 2007 |
| Grant date | Mar 9, 2010 |
| Priority date | — |
| Expiry date | Feb 23, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/009
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A flyback power supply method and apparatus is disclosed. An apparatus according to aspects of the present invention includes an energy transfer element having a primary winding and first and second output windings. The first and second output windings are coupled to produce first and second output values, respectively. A primary switch is coupled to the primary winding. A control circuit is coupled to the primary switch to regulate a sum of the first and second output values. A steering circuit having first and second output switches is also included. The first and second output switches are coupled to the first and second output windings, respectively, to regulate a ratio of the first output value to the second output value. The first output switch is coupled to block current through the first output winding and the second output switch is coupled to block current through second output winding. At least one of the first and second output switches is coupled to be closed when the primary switch is opened.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.