Circuit arrangement for operating at least one light source
US7154227B2 · kind B2 · utility
2Cited by
4References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 2, 2005 |
| Grant date | Dec 26, 2006 |
| Priority date | — |
| Expiry date | Sep 2, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit arrangement for operating at least one light source. Cost-effective power factor correction of the system input is achieved by a combination of a charge pump and a valley-fill circuit. According to the invention, the voltage (UN2) produced by the charge pump is fed into the valley-fill circuit with a lag, for example via an inductor (L2).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.