Patent ID: 9720429
Date: 2017-08-01
CPC Classifications: G05F,H01F,H02M

Claim:
1. A coupled-inductor structure, comprising: a first winding configured to conduct a first current, having a first node configured for coupling to a first phase node of a power supply, and having a second node configured for coupling to an output node of the power supply and to a first node first sense-impedance element that is configured to generate, across the first node and a second node of the first sense-impedance element, a first sense signal representative of the first current; a second winding configured for magnetic coupling with the first winding, having a first node coupled to the first node of the first winding, and having a second node configured for coupling to the second node of the first sense-impedance element; a third winding configured to conduct a second current, having a first node configured for coupling to a second phase node of the power supply, and having a second node configured for coupling to the output node of the power supply and to a first node of a second sense-impedance element that is configured to generate, across the first node and a second node of the second sense-impedance element, a second sense signal representative of the second current; and a fourth winding configured for magnetic coupling with the third winding, having a first node coupled to the first node of the third winding, and having a second node configured for coupling to a second node of the second sense-impedance element, wherein the third winding is configured for magnetic isolation from the first winding.