Control circuit and method for maintaining high efficiency in a buck-boost switching regulator
US6166527A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 27, 2000 |
| Grant date | Dec 26, 2000 |
| Priority date | — |
| Expiry date | Mar 27, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/1582
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A high efficiency control circuit for operating a buck-boost switching regulator is provided. The switching regulator can regulate an output voltage higher, lower, or the same as the input voltage. The switching regulator may be synchronous or non-synchronous. The control circuit can operate the switching regulator in buck mode, boost mode, or buck-boost mode. In buck mode, the switching regulator regulates an output voltage that is less than the input voltage. In boost mode, the switching regulator regulates an output voltage that is greater than the input voltage. In buck and boost modes, less than all of the switches are switched ON and OFF to regulate the output voltage to conserve power. In buck-boost mode, all of the switches switch ON and OFF to regulate the output voltage to a value that is greater than, less than, or equal to the input voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.