System and method for wide-range high-accuracy-low-dropout current regulation
US7839097B2 · kind B2 · utility
4Cited by
4References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 31, 2008 |
| Grant date | Nov 23, 2010 |
| Priority date | — |
| Expiry date | Jun 23, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/16
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention teaches a semiconductor circuit for driving an LED in which the current passing through the LED is regulated by adjusting the NMOS Rdson using a series of digital signals. The circuit maintains a high current accuracy over wide range of current changes while keeping a low voltage drop.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.