Control circuit and method for a temperature sensitive device
US5973528A · kind A · utility
7Cited by
1References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 16, 1998 |
| Grant date | Oct 26, 1999 |
| Priority date | — |
| Expiry date | Apr 16, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H5/042
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An embodiment of the present invention is a switching power supply that includes a power switching device and a control circuit to control the power switching device. Under normal operational conditions the power required by the power switching device is provided by an auxiliary secondary winding of the transformer of the power supply. When the temperature sensitive device gets into an unallowed operational condition this is no longer possible and as a consequence the device is disabled for a period of time which is determined by the amount of overheating of the device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.