Multiple-phase DC-DC converter topology
US6943535B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 16, 2003 |
| Grant date | Sep 13, 2005 |
| Priority date | — |
| Expiry date | Mar 15, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/1586
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A multiple-phase DC—DC converter adds at least one additional phase to an N-phase DC—DC converter to improve the converter's response to changes in load. In one embodiment, an additional phase operates at a switching frequency greater than that of the N phases, to generate a current which is added to the N phase currents to improve the converter's response to changes in load. In another embodiment, an additional phase is configured to improve the converter's response to a load release. Here, the additional phase is kept off during load increase and steady-state conditions. However, when a load release occurs, the additional phase is turned on and acts to extract current from the converter's output terminal while the N phase currents slowly fall, to reduce the magnitude of output voltage overshoot that occurs on load release.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.