Self-oscillating DC-DC Converter with zero voltage switching
US5412555A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 15, 1993 |
| Grant date | May 2, 1995 |
| Priority date | — |
| Expiry date | Oct 15, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/3385
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention is an ON/OFF type self-oscillating DC--DC converter with zero voltage switching and is provided with a transformer, a switching element on the primary side and a diode on the secondary side of the transformer, and configured so that the current (signal) flowing in the secondary side is detected by a resistor. The detected current is delayed by a comparator and provided with a short circuit which shorts the diode driven by the delayed signal. The present invention uses this arrangement to perform a switching operation at zero volts so that there is no switching loss, to improve the conversion efficiency and to have stable transmission operation even for non-load operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.