Overcurrent protection circuit and voltage regulator
US10505438B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 29, 2018 |
| Grant date | Dec 10, 2019 |
| Priority date | — |
| Expiry date | Mar 29, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/0027
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
There is provided an overcurrent protection circuit having a sense transistor through which a first sense current proportional to an output current of an output transistor flows, a voltage-current converting circuit connected between an input terminal of the output transistor and an output terminal thereof, and configured to output a first current, a first current-voltage converting circuit configured to output a first voltage proportional to the first current, a voltage detection circuit configured to detect the first voltage and to output a second sense current based on the output current of the output transistor, a second current-voltage converting circuit through which the first sense current and the second sense current flow, and a current limiting circuit configured to limit the output current of the output transistor based on a second voltage supplied from the second current-voltage converting circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.