Adaptive open-load overvoltage control method and circuit
US9793790B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 24, 2015 |
| Grant date | Oct 17, 2017 |
| Priority date | — |
| Expiry date | Nov 24, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An overvoltage protection circuit and a method for protecting against an output from a power supply reaching overvoltage levels is provided. The overvoltage protection provides two operational modes for the power supply. In both modes, the overvoltage protection monitors the output voltage of the power supply and disables it if the output voltage reaches a threshold indicating an overvoltage event. In normal operation, this threshold is set to a level that is higher than a nominal safety threshold defined for the power supply whereas in reduced operation, this threshold is set to a value lower than the safety threshold. When an overvoltage event is detected in normal operation, the overvoltage protection transitions the power supply into the reduced operational mode before reactivating it. The power supply may be reactivated, produce an overvoltage event, and be deactivated multiple times in the reduced operational mode. Normal operation may resume if the power supply has no overvoltage events for a predetermined time period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.