Invention Grant
- Patent Title: Current sensing of switching power regulators
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Application No.: US13899143Application Date: 2013-05-21
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Publication No.: US09791480B2Publication Date: 2017-10-17
- Inventor: Song Qin
- Applicant: ANALOG DEVICES GLOBAL
- Applicant Address: BM Hamilton
- Assignee: ANALOG DEVICES GLOBAL
- Current Assignee: ANALOG DEVICES GLOBAL
- Current Assignee Address: BM Hamilton
- Agency: Knobbe, Martens, Olson & Bear, LLP
- Main IPC: G01R19/00
- IPC: G01R19/00 ; H02M3/158 ; H02M1/00

Abstract:
Apparatus and methods for current sensing in switching regulators include a current sensing circuit to sense current of a power stage of a power converter. The power converter can include first and second transistors. The current sensing circuit comprises a transistor that is a scaled version of one of the transistors of the power converter. A circuit of the current sensing circuit matches a drain-to-source voltage of the transistor of the current sensing circuit to the corresponding transistor of the power converter. A current mirror generates a current that mirrors the current flowing through the transistor of the current sensing circuit. A first resistor converts the mirrored current to a current sensed signal.
Public/Granted literature
- US20140347078A1 CURRENT SENSING OF SWITCHING POWER REGULATORS Public/Granted day:2014-11-27
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