Actively tracking switching speed control of a power transistor

A gate driver system configured to drive a transistor between switching states in a power circuit, the gate driver system comprising:

• a gate driver circuit coupled to a gate terminal of the transistor and configured to control a gate voltage at the gate terminal in order to drive the transistor between the switching states, the gate driver circuit configured to generate an off-current during a plurality of turn-off switching events to turn off the transistor,
• wherein the gate driver circuit includes a first driver configured to sink a first portion of the off-current from the gate terminal to discharge a first portion of the gate voltage,
• wherein the gate driver circuit includes a second driver configured to, during a boost interval, sink a second portion of the off-current from the gate terminal to discharge a second portion of the gate voltage;
• a measurement circuit configured to measure a transistor parameter indicative of an oscillation of a drain-source voltage of the transistor for a first turn-off switching event during which the transistor is transitioned to an off state;
• and
• a controller configured to control the first driver to sink the first portion of the off-current and to control the second driver to sink the second portion of the off-current, wherein the controller is further configured to receive the measured transistor parameter and regulate a length of the boost interval based on the measured transistor parameter.