Constant power supply for LED emergency lighting using smart output resetting circuit for no load conditions
US9398649B2 · kind B2 · utility
15Cited by
1References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 19, 2013 |
| Grant date | Jul 19, 2016 |
| Priority date | — |
| Expiry date | Nov 21, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A constant power backup power supply for LED lighting fixtures is disclosed. The power supply includes a storage battery that is charged while an AC power source is in an ON condition. When AC power transitions to an OFF conditions, a capacitor bank charged by the battery supplies current to the primary side of a flyback converter operating in discontinuous conduction mode. The secondary side of the flyback converter supplies constant output power to the LED lighting fixture for an arbitrary output voltage within a predetermined range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.