| 摘要 |
The present document relates to power converters. In particular, the present document relates to free-wheeling detection and/or to the provisioning of the supply voltage of a driver circuit using a switched-mode power converter. A control circuit configured to control a switching state of a power switch (106) is described. A first port (121) of the power switch (106) is coupled to an inductor (103). The control circuit is configured to be coupled to a control port (120, 620) of the power switch (106); wherein the control port (120, 620) of the power switch (106) is different from the first port (121) of the power switch (106). The control circuit comprises a control unit (107, 601, 602) configured to generate a control signal for controlling the switching state of the power switch (106); wherein the control signal is to be provided to the control port (120, 620) of the power switch (106). Furthermore, the control circuit comprises free-wheeling sensing means (603) configured to detect an oscillation of a voltage at a measurement port (120, 620) of the power switch (106); wherein the measurement port (120, 620) of the power switch (106) is different from the first port (121) of the power switch (106); and wherein the oscillation of the voltage at the measurement port (120, 620) is indicative of free-wheeling of the inductor (103). |
