Voltage converter and LED driver circuits with progressive boost, skip, and linear mode operation
US8400131B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 9, 2010 |
| Grant date | Mar 19, 2013 |
| Priority date | — |
| Expiry date | Mar 19, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A voltage converter circuit can include a boost converter having a switching transistor and configured to receive an input voltage, produce an output voltage and selectively operate in one of a boost mode, a skip mode and a linear mode. In the boost and skip modes, the boost converter can switch on and off the switching transistor at a switching frequency to produce an output voltage at magnitudes greater than input voltage magnitudes. In the linear mode, the boost converter can turn off the switching transistor at all times to pass the input voltage unboosted to produce an output voltage at magnitudes less than input voltage magnitudes. The boost converter can be configured to operate in the boost mode for input voltage magnitudes less than a first predetermined input voltage magnitude, in the skip mode for input voltage magnitudes between the first predetermined magnitude and a second predetermined input voltage magnitude greater than the first predetermined input voltage magnitude, and in the linear mode for input voltage magnitudes greater than the second predetermined input voltage magnitude.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.