Semiconductor device and rechargeable power supply unit
US8378635B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2007 |
| Grant date | Feb 19, 2013 |
| Priority date | — |
| Expiry date | Nov 25, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J7/00302
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Provided are a semiconductor device and a rechargeable power supply unit which are capable of accurately detecting an overcharge state of a battery even in a case where the battery is charged with a sine wave charger. In a case where a ½ cycle of a charging voltage of the sine wave charger is shorter than a delay time for cancellation of an overdischarge state, when it is detected that a voltage of the battery in the overdischarge state exceeds an overdischarge detection voltage and becomes equal to or higher than an overcharge detection voltage, a delay circuit sets the delay time for cancellation of the overdischarge state to 0 seconds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.