Current-mode control for switched step up-step down regulators
US7394231B2 · kind B2 · utility
30Cited by
27References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 8, 2005 |
| Grant date | Jul 1, 2008 |
| Priority date | — |
| Expiry date | Feb 8, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/1582
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A switched regulator circuit provides step-up and step-down operation in which the level of the input voltage can be greater, equal to, or less than a preset controlled output voltage. A four switch arrangement or two switch arrangement provides buck, boost, and buck-boost regulation under constant frequency valley-peak current mode control. A single sense resistor may be utilized for sensing inductor current during only a short period during each duty cycle. As an alternative to the sense resistor, the switches themselves can be used to sense current during operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.