Start-up voltage for solid-state lighting controller
US9179523B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 4, 2014 |
| Grant date | Nov 3, 2015 |
| Priority date | — |
| Expiry date | Sep 4, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A controller, which may be a controller for solid-state lighting, includes a transformer, and a control circuit having a bias voltage input. The control circuit activates when voltage applied to the bias voltage input reaches a threshold. The transformer has a feedback output to the bias voltage input. The controller also has a bias voltage circuit including a resonant circuit providing a resonant current, and a bias capacitor charged by the resonant current, applying start-up bias voltage to the bias voltage input. The controller further has a cutoff to shut down the resonant current when the transformer feedback output is above the threshold. A method of operating the a controller includes providing a resonant current to charge a start-up bias capacitor. The method also includes automatically cutting off the resonant current when the transformer feedback output is above the threshold. This may be determined by monitoring the bias voltage input.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.