Synchronous rectifyier controlled by a current transformer
US6813166B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 9, 2003 |
| Grant date | Nov 2, 2004 |
| Priority date | — |
| Expiry date | Jun 9, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power converter with synchronous rectifying through the control of a current transformer is disclosed. The basic architecture of the power converter includes a flyback transformer (10), a switch controller (20) and a current transformer (30). The secondary winding of the flyback transformer (10) is connected to the primary winding of the current transformer (30) used to control the switch controller (20). The primary winding of the current transformer (30) is connected to a synchronous rectifying switch (Q7). If a current change occurs on the secondary winding of the flyback transformer (10), the current transformer (30) detects the phase change and enables the switch controller (20) to switch off the synchronous rectifying switch (Q7). The current transformer (30) turns off the synchronous rectifying switch (Q7) anticipatorily in the continuous current output mode to prevent any power loss from crossovers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.