Digital calibration with lossless current sensing in a multiphase switched power converter
US7262628B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 2, 2004 |
| Grant date | Aug 28, 2007 |
| Priority date | — |
| Expiry date | Jul 2, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/0009
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Disclosed is a multi-phase power regulator that accurately senses current at a load in a lossless manner and adjusts the power supplied to the load based on the sensed current. Also disclosed is a method of calibrating a multiphase voltage regulator by applying a known calibration current at the load and determining actual current values by the difference in measured values between when the known calibration current is applied and when it is not applied. The accurate current is determined at a known temperature and accurate temperature compensation is provided by a non-linear digital technique. Each phase of the multi-phase power regulator is individually calibrated so that balanced channels provide accurate power to the load. Also disclosed is a calibration method with minimal noise generation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.