Digital phase adjustment for multi-phase power converters
US8901901B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 10, 2012 |
| Grant date | Dec 2, 2014 |
| Priority date | — |
| Expiry date | Aug 18, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/1586
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A multiphase power converter includes one or both of a phase control circuit and a valley switching locking circuit. The phase control circuit measures a phase difference between a first phase circuit and a second phase circuit and varies an on-time of a drive switch of the second phase circuit to produce and maintain a predetermined phase difference between the first phase circuit and the second phase circuit. When the multiphase power converter is operating in a discontinuous mode of operation, the valley switching locking circuit counts the number of zero crossings of an input current of the first phase circuit and blocks a second zero crossing detection signal from a waveform generator (i.e., PWM driver) associated with the second phase circuit until an input current of the second phase circuit has as many zero crossings as that of the first phase circuit input current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.