LED lighting driver and drive method
US11246202B2 · kind B2 · utility
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4References
14Claims
0Family size
Assignee
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Key dates
| Filing date | Apr 5, 2018 |
| Grant date | Feb 8, 2022 |
| Priority date | — |
| Expiry date | Apr 5, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An LED lighting driver has a switched mode power supply which generates an auxiliary power supply. The auxiliary power supply circuit has a first power supply inductor and a second power supply inductor in series with each other. The second power supply inductor is selectively switched into or out of the auxiliary power supply circuit, thereby varying a transformer ratio to the main energy storage inductor. The switching may be made based on a light output mode or a standby mode being in operation. The standby mode then enables more efficient generation of an auxiliary supply voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.