Dimmable ballast control integrated circuit
US7521874B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 12, 2006 |
| Grant date | Apr 21, 2009 |
| Priority date | — |
| Expiry date | Oct 12, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An IC for controlling a power supply circuit for delivering power to a fluorescent lamp in accordance with an embodiment of the present invention includes a ballast control section operable to provide drive signals to the power supply circuit and an amplifier section integrated into the IC and operable to provide a dimming signal to the ballast control section. The ballast control section drives the power supply circuit to provide for dimming of the lamp based on the dimming signal. An IC for controlling a power supply circuit for delivering power to a fluorescent lamp in accordance with another embodiment of the present application includes a ballast control section operable to provide drive signals to the power supply circuit; and an amplifier section integrated into the IC. The ballast control section provides the drive signals to the power supply circuit, receives current sense signals indicative of current in said lamp, and responds to the current sense signals by modifying the drive signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.