Light-emitting diode offline buck converter and method of controlling thereof
US9055623B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 12, 2013 |
| Grant date | Jun 9, 2015 |
| Priority date | — |
| Expiry date | May 1, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/375
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for controlling a buck converter of an alternating current (AC)-powered light emitting diode (LED) circuit. The method includes receiving an input voltage, and converting the input voltage to a feedback voltage. The method can also include sending the feedback voltage to the buck converter. The feedback voltage is proportional to the input voltage by a first factor when the input voltage is less than an upper threshold voltage and greater than a lower threshold voltage. The feedback voltage is proportional to the input voltage by a second factor when the input voltage is at least as great as the upper threshold voltage. The upper threshold voltage is less than a maximum voltage of the input voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.