Ballast control circuit for use with CCFL and EEFL lamps
US7508142B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 17, 2007 |
| Grant date | Mar 24, 2009 |
| Priority date | — |
| Expiry date | Jul 17, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B41/2828
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A ballast control circuit for driving at least one gas discharge lamp in accordance with an embodiment of the present application includes a high side driver operable to provide a high side driving signal to a high side switch of a half bridge controlled by the ballast control circuit, wherein the high side driving signal indicates a preferred duty cycle for the high side switch, a low side driver operable to provide a low side driving signal to a low side switch of the half bridge, wherein the low side driving signal indicates a preferred duty cycle for the low side switch and a dead time control circuit operable to provide a dead time signal that indicates a dead time during which both the high side and low side switches are turned OFF, wherein the dead time is set based on a value of an external dead time resistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.