Dc-dc converter
US6445598B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 9, 2001 |
| Grant date | Sep 3, 2002 |
| Priority date | — |
| Expiry date | Aug 9, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A serial circuit of the primary winding (21) of a transformer (2), a switching device (3) and a current-detecting resistor (4) is connected between a pair of dc terminals (18, 19). A smoothing capacitor (7) is connected to the secondary winding (22) of the transformer (2) via a diode (6). A resonance capacitor (5) is connected in parallel with the serial circuit of the switching device (3) and the current-detecting resistor (4). The current detection signal, the output voltage detection signal, and the switch voltage detection signal are combined to provide control pulses for the switching device (3). A control circuit (13) includes a minimum non-conducting period determination circuit for setting a first and a second minimum nonconducting period with hysteresis. The nonconducting periods of the switching device are placed under the limitation of the minimum nonconducting periods when the load is light. The zero-voltage switching of the switching device (3) is effected upon lapse of the minimum non-conducting periods and upon completion of the release of the stored energy from the transformer (2).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.