Electronic ballast having a protective circuit for a switching transistor of a converter
US7196479B2 · kind B2 · utility
7Cited by
8References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 14, 2004 |
| Grant date | Mar 27, 2007 |
| Priority date | — |
| Expiry date | Oct 14, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B41/2853
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention relates to an electronic ballast for lamps having a converter, in which a switching transistor is protected against transient disturbances by a detection circuit C1, C2, R1, R2, D1–3, T1. In this case, the time derivative of the voltage is taken into consideration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.