Patent ID: 11949334
Assignee: APPLE INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 15:
16. A system comprising:
a load circuit configured to operate according to a regulated supply voltage; and
a coupled inductor power converter configured to generate the regulated supply voltage on a regulated supply voltage node, wherein the power converter includes:
a first switching circuit having a first switching node;
a second switching circuit having a second switching node;
a first inductor having a first terminal coupled to the first switching node, and a second terminal coupled to the regulated supply voltage node;
a second inductor having a first terminal coupled to the second switching node and a second terminal coupled to the regulated supply voltage node, wherein the first and second inductors share a magnetic core; and
a current sensing circuit including:
a first filter circuit configured to filter a voltage level of the first terminal of the first inductor to generate a first filtered signal;
a second filter circuit configured to filter a voltage level of the second terminal of the first inductor to generate a second filtered signal;
a third filter circuit configured to filter a voltage level of the first terminal of the second inductor to generate a third filtered signal;
a fourth filter circuit configured to filter a voltage level of the second terminal of the second inductor to generate a fourth filtered signal;
a first capacitor coupled between the first and third filter circuits;
a second capacitor coupled between the second and fourth filter circuits; and

a control circuit configured to adjust an operation of the first and second switching circuits using a voltage level of the regulated supply voltage node, and the first, second, third, and fourth filtered signals.