Flyback converter and controlling method thereof
US10050538B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 18, 2017 |
| Grant date | Aug 14, 2018 |
| Priority date | — |
| Expiry date | Sep 18, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A flyback converter includes a primary side circuit, a secondary side circuit and a controller. The primary side circuit includes a primary winding and a main switch electrically connected to the primary winding. The secondary side circuit includes a secondary winding and an output diode electrically connected to the secondary winding and having a parasitic electrical parameter. The controller generates a correcting parameter for counteracting an effect on an output voltage of the flyback converter from the parasitic electrical parameter, wherein the parasitic electrical parameter is an equivalent series-connection resistance Rd of the output diode and the secondary side circuit, and the correcting parameter is calculated based on the formula wherein np denotes a turns number of the primary winding, ns denotes a turns number of the secondary winding, and Iini denotes an initial current value which is detected when the main switch is conducted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.