Pulse modulation for isolated auxiliary voltage and dimming signal transfer over single opto-isolator
US10219343B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 14, 2018 |
| Grant date | Feb 26, 2019 |
| Priority date | — |
| Expiry date | Feb 14, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In an example, a controller that controls one or more light-emitting diodes (LEDs), wherein the controller is configured to receive an output voltage from a secondary transformer winding of a transformer, and receive first information across a galvanic isolation barrier, wherein the first information includes a desired LED brightness. The controller is further configured to receive second information across the galvanic isolation barrier, and the second information includes an output voltage of an auxiliary transformer winding; The controller may control the one or more LEDs based on the first information, and also control the output voltage of a secondary transformer winding and the output voltage of the auxiliary transformer winding based on the first information and the second information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.