Semi-soft switching and precedent switching in synchronous power supply controllers
US5757173A · kind A · utility
39Cited by
6References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 31, 1996 |
| Grant date | May 26, 1998 |
| Priority date | — |
| Expiry date | Oct 31, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A control circuit for synchronous switching power supplies employing semi-soft switching during turn off and precedent switching during turn on. During turn off, an output voltage is compared to a reference voltage to turn on a synchronous switch after a primary switch is turned off. During turn on, a timing voltage ramp triggers the turn off of the synchronous switch prior to the turn on of the primary switch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.