Power supply unit with re-rush current limiting
US10483868B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 16, 2017 |
| Grant date | Nov 19, 2019 |
| Priority date | — |
| Expiry date | Feb 16, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power supply unit includes a rectifying module to rectify an alternating current (AC) voltage, a first bulk capacitor to receive the rectified AC voltage from the rectifying module, a first transistor coupled in series with the first bulk capacitor, an AC input monitoring circuit, and a current source. The AC input monitoring circuit holds the first transistor in an OFF state in response to a detection of an AC voltage dropout. The current source adopts an adaptive gate voltage to control the first transistor in response to a detection of the AC voltage being re-applied, and turns on the first transistor based on the adaptive gate voltage to limit a re-rush current within the power supply unit after the AC voltage is re-applied.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.