Patent ID: 9641075
Date: 2017-05-02
CPC Classifications: H02M

Claim:
1. A current feedback circuit for a Direct Current (DC)-DC converter, the current feedback circuit comprising: a voltage divider circuit having an input coupled to an output of the DC-DC converter, and an output; a feedback comparator having a first input, a second input coupled to the output of the voltage divider circuit, and an output; a filter circuit having a first input for receiving a reference voltage, a second input coupled to the output of the voltage divider circuit, and an output coupled to the first input of the feedback comparator; a current replication circuit comprising: an alternating current (AC)-coupling circuit comprising a second capacitor having a first terminal coupled to the first terminal for the first capacitor, and a second terminal coupled to the output of the voltage divider circuit, the AC coupling circuit configured to add the current feedback to a regulation circuit of the current feedback circuit and to remove a DC voltage from the current replication circuit, wherein the regulation circuit comprises the filter circuit, the filter circuit configured to compensate for an offset of an output voltage of the DC-DC converter caused by the current feedback.