Ballast control IC with minimal internal and external components
US6525492B2 · kind B2 · utility
18Cited by
4References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 19, 2001 |
| Grant date | Feb 25, 2003 |
| Priority date | — |
| Expiry date | Jun 19, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A ballast controller integrated circuit which executes a specific set of instructions via an integrated state diagram architecture to control a fluorescent lamp or high intensity discharge lamp and protect the ballast. The state diagram architecture controls powering up and down of the IC and the half-bridge circuit driven by the IC, preheating and striking of the lamp, running of the lamp, sensing for numerous possible fault conditions, and recovering from these fault conditions based on the normal maintenance of a lamp, while requiring fewer internal and external components than previous electronic ballasts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.