Patent ID: 9726697
Date: 2017-08-08
CPC Classifications: G01R

Claim:
1. A coupled inductor current sensing apparatus, comprising: a current sum sense capacitor coupled between a summing node and an output terminal, a sum sense voltage across the current sum sense capacitor being proportional to an instantaneous sum of magnitudes of currents flowing through first and second two mutually coupled inductors, the first mutually coupled inductor being coupled between the output terminal and a first switched voltage input terminal to receive a corresponding first switched drive voltage (“first drive phase”) from a multiphase voltage source, and the second mutually coupled inductor being coupled between the output terminal and a second switched voltage input terminal to receive a corresponding second switched drive voltage (“second drive phase”) from the multiphase voltage source; a first current sum sense resistor coupled between the first switched voltage input terminal and the summing node; and a second current sum sense resistor coupled between the second switched voltage input terminal and the summing node.