Fluorescent ballast controller IC
US7211966B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 11, 2005 |
| Grant date | May 1, 2007 |
| Priority date | — |
| Expiry date | Jul 11, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S315/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A ballast control integrated circuit for driving at least one gas discharge lamp comprising a first oscillator circuit for producing a first oscillating signal; a driver circuit for driving first and second output transistors connected in a half bridge configuration; the driver circuit being provided with pulsed signals derived from the first oscillating signal for generating pulsed drive signals for driving the first and second transistors; and a dimming control circuit responsive to a dimming input signal to drive the driver circuit such that the driver circuit provides the pulsed drive signals in bursts thereby to dim the lamp in dependence on the level of the dimming input signal. The ballast control integrated circuit also provides overcurrent and overvoltage sensing and allows master/slave operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.