The present disclosure provides a method for controlling a surgical instrument. The method includes connecting a power assembly to a control circuit, wherein the power assembly is configured to provide a source voltage, energizing, by the power assembly, a voltage boost convertor circuit configured to provide a set voltage greater than the source voltage, and energizing, by the voltage boost convertor, one or more voltage convertors configured to provide one or more operating voltages to one or more circuit components.

According to one aspect, embodiments of the invention provide a start-up circuit for a power system, the start-up circuit comprising an input configured to be coupled to a power source and to receive input DC power from the renewable energy based power source, an output, a current regulator portion coupled to the input and configured to provide a regulated output current derived from the input DC power to the output, and a voltage regulator portion coupled to the current regulator portion and the output and configured to generate a regulated output voltage at the output derived from the input DC power.

According to an embodiment, a method of operating a switching power supply includes applying a periodic switching signal to a first switch that is coupled to an output node, detecting an offset delay between applying the periodic switching signal and a change in voltage of the output node, calculating a corrected midpoint of a half phase of the periodic switching signal based on the offset delay, generating a sampling pulse based on the corrected midpoint, and sampling a current at the output node according to the sampling pulse.

According to an embodiment, a method of operating a switching power supply includes applying a periodic switching signal to a first switch that is coupled to an output node, detecting an offset delay between applying the periodic switching signal and a change in voltage of the output node, calculating a corrected midpoint of a half phase of the periodic switching signal based on the offset delay, generating a sampling pulse based on the corrected midpoint, and sampling a current at the output node according to the sampling pulse.

The present disclosure provides a method for controlling a surgical instrument. The method includes connecting a power assembly to a control circuit, wherein the power assembly is configured to provide a source voltage, energizing, by the power assembly, a voltage boost convertor circuit configured to provide a set voltage greater than the source voltage, and energizing, by the voltage boost convertor, one or more voltage convertors configured to provide one or more operating voltages to one or more circuit components.

The present disclosure provides a method for controlling a surgical instrument. The method includes connecting a power assembly to a control circuit, wherein the power assembly is configured to provide a source voltage, energizing, by the power assembly, a voltage boost convertor circuit configured to provide a set voltage greater than the source voltage, and energizing, by the voltage boost convertor, one or more voltage convertors configured to provide one or more operating voltages to one or more circuit components.

The present disclosure provides a method for controlling a surgical instrument. The method includes connecting a power assembly to a control circuit, wherein the power assembly is configured to provide a source voltage, energizing, by the power assembly, a voltage boost convertor circuit configured to provide a set voltage greater than the source voltage, and energizing, by the voltage boost convertor, one or more voltage convertors configured to provide one or more operating voltages to one or more circuit components.

The present disclosure provides a method for controlling a surgical instrument. The method includes connecting a power assembly to a control circuit, wherein the power assembly is configured to provide a source voltage, energizing, by the power assembly, a voltage boost convertor circuit configured to provide a set voltage greater than the source voltage, and energizing, by the voltage boost convertor, one or more voltage convertors configured to provide one or more operating voltages to one or more circuit components.

A powered surgical instrument is disclosed comprising a housing, an elongate shaft extending from the housing, and an end effector extending from the elongate shaft. The end effector is configured to perform at least one end effector function. The powered surgical instrument further comprises a motor and a segmented circuit. The segmented circuit comprises a plurality of circuit segments configured to control the powered surgical instrument. The powered surgical instrument further comprises a power source configured to supply each one of the plurality of circuit segments with a different voltage. The powered surgical instrument further comprises a boost converter configured to provide an increased voltage to one of the plurality of circuit segments when current draw in another of the plurality of circuit segments exceeds a predetermined value.

A powered surgical instrument is disclosed comprising a housing, an elongate shaft extending from the housing, and an end effector extending from the elongate shaft. The end effector is configured to perform at least one end effector function. The powered surgical instrument further comprises a motor and a segmented circuit. The segmented circuit comprises a plurality of circuit segments configured to control the powered surgical instrument. The powered surgical instrument further comprises a power source configured to supply each one of the plurality of circuit segments with a different voltage. The powered surgical instrument further comprises a boost converter configured to provide an increased voltage to one of the plurality of circuit segments when current draw in another of the plurality of circuit segments exceeds a predetermined value.