Switching control circuit and power supply circuit
US12413152B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 24, 2023 |
| Grant date | Sep 9, 2025 |
| Priority date | — |
| Expiry date | Mar 20, 2044 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/33571
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A switching control circuit for a power supply circuit that includes a transformer including primary and secondary coils, and first and second transistors controlling a current flowing through the primary coil. The power supply circuit generates an output voltage at a target level. The switching control circuit controls switching of the first and second transistors. The switching control circuit includes: a drive signal output circuit configured to output drive signals according to a normal mode, when the output voltage is lower than a first level, and output the drive signals according to a burst mode, when the output voltage is higher than the first level; and a driver circuit configured to switch the first and second transistors in response to the drive signals. The drive signal output circuit reduces a first time period in the burst mode, in response to the output voltage rising above the first level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.