Sleep mode power management
US6586911B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 6, 2002 |
| Grant date | Jul 1, 2003 |
| Priority date | — |
| Expiry date | Feb 6, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power management circuit for a battery operated electrical device that may include a number of switching circuits. The switching circuits are coupled between the battery and a corresponding one of various electronic sub-circuits. A battery monitoring circuit is arranged to monitor a voltage associated with the battery. Each switching circuit selectively couples a corresponding one of the electronic sub-circuits to the battery based on the battery voltage. In another example, the monitor circuit and the switching circuit functions are provided within the corresponding electronic sub-circuit. Battery power is conserved by selectively disabling (i.e., placing them in a sleep mode) the various electronic sub-circuits based on the battery voltage. The power management circuit may be arranged to select between charger circuits that have distinct charging characteristics, as well as to enable/disable various analog and digital electronics in the battery operated electrical device depending upon the monitored battery condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.