Patent ID: 9537396
Date: 2017-01-03
CPC Classifications: H02M,H03K,Y02B

Claim:
1. A control circuit configured to control a power switch of a switched-mode power converter; wherein the power switch comprises a bipolar transistor; wherein a collector of the power switch is arranged in series with an inductive element of the power converter: —wherein the control circuit is configured to determine an indication of a time instant, at which the power switch is switched off; adjust a basis current for controlling the power switch based on a time interval between a time instant, at which the switching off of the power switch was initiated, and the time instant, at which the power switch is switched off; determine an indication of an emitter current of the power switch; and determine an indication of a collector current of the power switch based on the indication of the emitter current by offsetting the indication of the emitter current with an offset; wherein the offset is dependent on a characteristic of the inductive element.