Power source circuit
US6605925B2 · kind B2 · utility
7Cited by
2References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 14, 2002 |
| Grant date | Aug 12, 2003 |
| Priority date | — |
| Expiry date | Feb 14, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J7/00302
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention provides a power source circuit which is capable of preventing a current from being caused to flow from a battery charger to a secondary battery in the over-charge detection state. In order to cut off a current from a parasitic diode of a transistor having a gate electrode to which a signal to release the over-current state is inputted from a switching-device-controlling logic circuit, a charge and discharge controlling circuit includes a diode connected between the transistor and a current detecting circuit, thereby preventing a current from being caused to flow from the battery charger to the secondary battery.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.