Secondary side switch-off timing adjusting method, apparatus, and system using same
US7791913B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | May 15, 2009 |
| Grant date | Sep 7, 2010 |
| Priority date | — |
| Expiry date | May 15, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/33576
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention discloses a secondary side switch-off timing adjusting method for a switching power conversion, comprising: detecting the falling edge of the voltage across a secondary side transistor according to a first reference voltage to generate a first reset signal; detecting the rising edge of the voltage across the secondary side transistor according to a second reference voltage to generate a first set signal; generating a secondary side discharging end signal from a latch operation in response to the first reset signal and the first set signal; and generating an off-predicting signal according to the cycle period of the secondary side discharging end signal. The present invention also provides a secondary side switch-off timing adjusting apparatus, and a system using the apparatus for a power conversion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.