Reverse battery protection device containing power MOSFET
US5517379A · kind A · utility
56Cited by
9References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 26, 1993 |
| Grant date | May 14, 1996 |
| Priority date | — |
| Expiry date | May 26, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10D30/603
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A device for protecting battery-powered semiconductor devices and the like against a reverse battery condition. During normal operation a charge pump charges the gate of a power MOSFET, turning the MOSFET on and providing a low-resistance power supply path from the battery to the load. If the battery is reversed, a depletion mode device shorts the gate and source of the MOSFET, turning it off and disconnecting the load from the battery.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.