High-efficiency DC-DC converter
US5729444A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 26, 1995 |
| Grant date | Mar 17, 1998 |
| Priority date | — |
| Expiry date | May 26, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A DC-DC converter includes a transformer with two oppositely-wound primary windings, one on each side of a center tap, and at least one secondary winding connected to a load having a given capacitance. A reference voltage source is connected to the center tap of the transformer via an inductor so that the transformer is driven by a current source. Two switching devices are each connected in the return path of the reference voltage and in series with a respective primary winding. A control unit alternately and periodically connects the return path for the reference voltage to one or other of the primary windings. The control unit includes an oscillator generating squarewave signals has two complementary outputs connected directly to a control terminal of a respective switching device. The frequency of the oscillator is substantially equal to the resonant frequency of a circuit comprising the secondary inductance of the transformer and the capacitance of the load.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.