Nulling Reverse Recovery Charge in DC/DC Power Converters

A switching mode power converter circuit, comprising:

• a first transistor switch and a second transistor switch coupled in series between an input voltage level and ground;
• a control circuit for controlling switching operation of the first transistor switch and the second transistor switch;
• and
• a detection circuit for sensing a voltage at an intermediate node arranged between the first transistor switch and the second transistor switch, for deriving an indication of a slope of the sensed voltage, and for generating a switching control signal for the control circuit on the basis of the derived indication of the slope of the sensed voltage,
• wherein the control circuit is configured to set a first timing for activating the first transistor switch and/or a second timing for activating the second transistor switch on the basis of the switching control signal;
• the detection circuit comprises a slope detector circuit;
• and
• the slope detector circuit is configured to:
• derive the indication of the slope of the sensed voltage;
• and
• generate one or more intermediate signals indicative of respective timings at which a magnitude of the slope of the sensed voltage exceeds a predetermined threshold.