Capacitive drop power supply for lighting control
US11337284B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 2021 |
| Grant date | May 17, 2022 |
| Priority date | — |
| Expiry date | Apr 30, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/34
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit includes a capacitor-drop power supply including a series combination of a resistor and a first capacitor. The capacitor-drop power supply includes an output and is adapted to be coupled to a light source. The circuit also includes a second capacitor, a switch, and an active clamp circuit. The second capacitor couples to the output of the capacitor-drop power supply. The switch couples in parallel with the series combination of the resistor and the first capacitor. The switch is configured to cause the light source to illuminate. The active clamp circuit couples to the capacitor-drop power supply. The active clamp circuit has an output coupled to the capacitor-drop power supply. The active clamp circuit is configured to cause current to continuously flow through at least one of the switch or the series combination of resistor and first capacitor regardless of a magnitude of the voltage across the second capacitor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.