Two-step ripple-free multi-phase buck converter and method thereof
US6839252B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 21, 2003 |
| Grant date | Jan 4, 2005 |
| Priority date | — |
| Expiry date | Jul 23, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/0029
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A two-step ripple-free multi-phase buck converter and method thereof comprises a first-stage voltage regulator to convert an input voltage to an intermediate voltage and a second-stage voltage regulator with a phase number not less than two to further convert the intermediate voltage to an output voltage by a split phase control, in which the ratio of the intermediate voltage to the output voltage is intended to the phase number such that the steady state output current of the converter approaches to be ripple-free, and hence the drivers and MOSFETs for the second-stage voltage regulator are lower cost, the efficiency of the second-stage voltage regulator is improved, and a higher slew rate current is obtained for transient driving capabilities.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.