Edge rate control gate driver for switching power converters

An edge rate driver for a power converter switch, the driver comprising:

• an input node configured to receive a pulse width modulated signal;
• a first switch configured to couple a control node of the power converter switch to a supply voltage during a first state;
• a second switch configured to couple the control node of the power converter switch to a reference voltage during a second state;
• a first current source configured to supply charge current to the first switch when the power converter switch transitions from the second state to the first state, the charge current configured to charge a parasitic capacitance of the power converter switch;
• a second current source configured to provide discharge current for the second switch when the power converter switch transitions from the first state to the second state, the discharge current configured to discharge the parasitic capacitance of the poser converter switch;
• and
• a feedback circuit configured to receive a voltage from an output node of the power converter switch and to modulate a transition of the control node of the power converter switch, the feedback circuit configured to hard switch the control node of the power converter switch;
• wherein the feedback circuit includes:
• secondary driver switches configured to couple to the control node of the power converter switch;
• an inverter configured to control the secondary driver switches;
• secondary current sources configured to couple to the secondary driver switches;
• an error amplifier configured to receive the voltage from the output node of the power converter switch and to control the secondary current sources;
• and
• a reference capacitor coupled to a node between the first switch and the second switch and configured to provide a command signal to the error amplifier.