Power supply device sensing AC-off state
US9887618B2 · kind B2 · utility
3Cited by
2References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 22, 2014 |
| Grant date | Feb 6, 2018 |
| Priority date | — |
| Expiry date | Oct 25, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/335
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
There is provided a power supply device sensing an AC-off state. The power supply device includes a rectifier configured to rectify AC power into DC power, a transformer configured to supply output voltage by converting voltage of the DC power rectified by the rectifier, and a Pulse Width Modulation (PWM) control module configured to output voltage by switching a power switching device connected to the transformer, configured to drive the power supply device by connecting power of an HV pin to a VCC pin, and configured to determine an AC-off state by sensing voltage rectified by the rectifier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.