Electronic device for protecting against a polarity reversal of a DC power supply voltage, and its application to motor vehicles
US9142951B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 30, 2013 |
| Grant date | Sep 22, 2015 |
| Priority date | — |
| Expiry date | Sep 30, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10D89/601
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Disclosed herein is a device comprising a protection circuit configured to protect against a polarity reversal of the input DC power supply voltage, the protection circuit comprising an N-channel main transistor having a source coupled to an input terminal and having a drain coupled to an output terminal, a command circuit configured to render the main transistor blocked in the event of a polarity reversal and conducting otherwise, and a control circuit configured to dynamically adjust the bias of substrate regions of respective components connected to the main transistor by connecting the substrate regions either to the source or to the drain of the main transistor according to the value of the voltages present at the source and the drain of the main transistor and the type of conductivity of the substrate regions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.