Power device driving method and drive circuit for switching circuit, and the switching circuit
US10886853B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 1, 2019 |
| Grant date | Jan 5, 2021 |
| Priority date | — |
| Expiry date | Dec 1, 2039 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power device driving method and a driving circuit for a switching circuit having a main switching transistor, a synchronous rectifier, and an inductive element. When a switching signal indicates that the synchronous rectifier is turned from on to off and the main switching transistor is turned from off to on, a gate voltage of the synchronous rectifier is pulled down to be lower than a threshold voltage of the synchronous rectifier and higher than zero voltage by a body effect of a MOS transistor, and timing is started. When detecting that a gate voltage of the main switching transistor rises to a first voltage or the timing reaches a first time, the gate voltage of the synchronous rectifier is pulled down to the zero voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.