Current sensing and control for a transistor power switch
US10361695B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 6, 2018 |
| Grant date | Jul 23, 2019 |
| Priority date | — |
| Expiry date | Jun 6, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/0054
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An apparatus includes: a first power transistor having a first current conduction path coupled between an input for receiving a supply voltage and a node and a first gate terminal coupled to a first gate control signal; a second power transistor having a second current conduction path coupled between the node and an output terminal for supplying a load current to a load; and a second gate terminal coupled to a second gate control signal; and a current sense transistor having a third gate terminal coupled to the first gate control signal, and outputting a sense current. The apparatus further includes: a differential amplifier having an output signal, and a feedback transistor having a gate terminal coupled to the output signal of the differential amplifier; and a resistor coupled between a monitor node and ground.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.