Single-stage digital power converter for driving LEDs
US7378805B2 · kind B2 · utility
138Cited by
6References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 22, 2005 |
| Grant date | May 27, 2008 |
| Priority date | — |
| Expiry date | Mar 22, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
This invention presents a single-stage power converter for driving many number of Light-Emitting-Diode (LED). The power converter converts an AC input voltage into DC current source and regulates the current flowing into the LED. In addition, the AC input current is controlled to have a sinusoidal waveform synchronized with the AC input voltage so that AC input Power Factor is corrected. Hence, both of Power Factor Correction (PFC) and LED current regulation are obtained simultaneously by using a single power conversion stage. So higher efficiency with low cost can be obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.