Method and apparatus for fault detection scheme for cold cathode fluorescent lamp (CCFL) integrated circuits
US7894174B2 · kind B2 · utility
3Cited by
67References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 17, 2008 |
| Grant date | Feb 22, 2011 |
| Priority date | — |
| Expiry date | Jun 18, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B41/2858
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A fault detection circuit and a short-circuit detection circuit for a Cold Cathode Fluorescent Lamp (CCFL) driver integrated circuit having a power bridge and a CCFL load are disclosed that includes a reference circuit operable to generate a reference current in response to an external component, a replica component having a dimension substantially less than the components of the power bridge, a multiplexer circuit, and a comparator circuit. The replica component and the multiplexer circuit pass the reference current and the replica current to the comparator circuit respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.