Switching power supply circuit with synchronous rectification and associated control method
US10673344B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 19, 2018 |
| Grant date | Jun 2, 2020 |
| Priority date | — |
| Expiry date | Nov 19, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A switching power supply circuit with synchronous rectifier has an energy storage component, a rectifier switch coupled to a secondary side of the energy storage component, and a secondary side control circuit. The secondary side control circuit provides a driving signal to control the rectifier switch. When the drain-source voltage across the rectifier switch is less than a first threshold value, the secondary side control circuit controls the driving signal to be a maximum voltage to control the rectifier switch being fully on for a predetermined duration. After a predetermined duration, the secondary side control circuit adjusts the voltage of the driving signal based on the drain-source voltage across the rectifier switch and a second threshold value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.