AC-OK detection circuit and method
US10630105B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 23, 2017 |
| Grant date | Apr 21, 2020 |
| Priority date | — |
| Expiry date | Oct 15, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
According to one aspect, embodiments of the invention provide a power circuit comprising an input to receive input AC power from an AC source, an auxiliary charger configured to convert the input AC power from the input into DC power, a differential amplifier configured to be powered by the DC power from the auxiliary charger, to monitor the input AC voltage level of the input AC power, and to generate a sense signal based on a status of the input AC voltage level, and a processor coupled to the auxiliary charger and the differential amplifier, the processor configured to be coupled to an LPS, to be powered into a low power mode by the DC power from the auxiliary charger, and to analyze the sense signal from the differential amplifier in the low power mode of operation. According to one embodiment, the auxiliary charger is an offline DC-DC converter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.