Electronic circuit for driving a diode load
US7675245B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 4, 2007 |
| Grant date | Mar 9, 2010 |
| Priority date | — |
| Expiry date | May 16, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F1/46
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An electronic circuit includes circuit portions for identifying a largest voltage drop through one of a plurality of series connected diode strings and for controlling a boost switching regulator according to the largest voltage drop. The electronic circuit can sense an open circuit series connected diode string, which would otherwise have the largest voltage drop, and can disconnect that open circuit series connected diode string from control of the boost switching regulator. Another electronic circuit includes a current limiting circuit coupled to or within a boost switching regulator and configured to operate with a diode load. Another electronic circuit includes a pulse width modulation circuit configured to dim a series connected string of light emitting diodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.