Constant current control buck converter without current sense
US9420645B2 · kind B2 · utility
3Cited by
4References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 9, 2013 |
| Grant date | Aug 16, 2016 |
| Priority date | — |
| Expiry date | Jan 23, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light emitting diode (LED) controller provides constant current regulation for a converter circuit providing current to an LED. The LED controller senses an inductor voltage and determines an inductor reset time from the sensed inductor voltage. Based on the determined inductor reset time, a switch on time and a switch period, the LED controller generates a control signal modifying the state of a switch coupling the converter circuit to an input voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.