Patent ID: 11888400
Assignee: STMICROELECTRONICS (GRENOBLE 2) SAS
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 0:
1. An USB interface comprising:
a transformer;
a primary winding of the transformer and a first switch connected in series between a first node and a second node;
a secondary winding of the transformer and a component connected in series between a third node and a fourth node, the fourth node configured to be set to a first reference potential;
a second switch connected between the third node and a first terminal, the first terminal configured to provide an output voltage of the USB interface;
wherein the component is configured to avoid a current circulation in the secondary winding when the first switch is closed; and
a control circuit configured to:
compare a first voltage of an interconnection node between the secondary winding and the component to a first threshold; and
compare the first voltage to a second threshold when the first voltage is, in absolute values, above the first threshold.