Reverse battery protection circuit with isolation and reverse polarity circuits
US12266922B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jun 20, 2022 |
| Grant date | Apr 1, 2025 |
| Priority date | — |
| Expiry date | Jun 30, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/6872
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit for reverse battery protection includes an isolation circuit and a control circuit. The isolation is circuit coupled between a gate output of an electronic fuse (E-fuse) and at least one external metal-oxide-semiconductor field-effect transistor (MOSFET). The E-fuse is coupled between a battery voltage pin and an external ground pin and further coupled to a microcontroller. The isolation circuit is configured to disconnect the gate output from the at least one external MOSFET when the battery is installed with reverse polarity. The control circuit is coupled between the external ground pin and the at least one external MOSFET. The control circuit is configured to turn on the at least one external MOSFET when the battery is installed with the reverse polarity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.