Power abnormal protection circuit
US7495875B2 · kind B2 · utility
10Cited by
3References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 5, 2007 |
| Grant date | Feb 24, 2009 |
| Priority date | — |
| Expiry date | Aug 15, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power abnormal protection circuit includes a power detection unit, a voltage drop correction unit, a drop out detection unit, a delay unit and a delay masking unit. By detecting an input power average value of a power supply occurring of a brown out condition can be determined. The power supply includes a power factor correction unit which has an output capacitor. By detecting the voltage of the output capacitor a drop out condition can be determined. When a power abnormal condition occurs all units of the power supply can be set off sequentially according to a delay time to protect circuit elements and a connecting computer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.