Apparatus and method for controlling a power supply
US6800961B2 · kind B2 · utility
8Cited by
49References
25Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 20, 2001 |
| Grant date | Oct 5, 2004 |
| Priority date | — |
| Expiry date | Aug 29, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J9/005
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a dual power supply, a main power supply is shut down by providing a signal from an auxiliary power supply. To generate the shutdown signal, a load is temporarily applied to the output of the auxiliary power supply for a predetermined time. The application of the load is detected using a hysteretic comparator in the auxiliary power supply that remains in a high state for a time period that exceeds a reference time period, which is established by a timer circuit. In response to exceeding the reference time period, the shutdown signal is sent to the main power supply.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.