Multi-wire common mode choke for increasing common mode transient immunity and minimizing circulating current in paralleled power semiconductors

A multi-wire common mode impedance choke for a power supply driver circuit driving a power switching transistor providing alternating current power to a load, the multi-wire common mode choke comprising:

• a first wire connected in series between a first output of a gate driver circuit driving said switching power transistor and a first terminal input (gate) of the switching power transistor device;
• a second wire connected in series between a second output of the gate driver circuit driving the switching power transistor and a second terminal (source/emitter) of the switching power transistor device and
• a third wire connected in series between an overload detection control circuit and a third terminal (drain/collector) of the switching power transistor device,
• said first wire and second wire providing an impedance preventing common mode transient signals generated by the switching power transistor device from feeding back into a power transistor driver control device of the gate driver circuit;
• and
• said third wire providing a further impedance preventing differential mode transient signals generated by the switching power transistor from feeding back into the power transistor driver control device via a current overload protection conducting path.