Multi-electrode spinal cord stimulation therapy

A neurostimulation system, comprising:

• at least one implantable lead comprising a plurality of electrodes;
• and
• an implantable pulse generator (IPG) electrically coupled to the at least one implantable lead, wherein the IPG comprises control circuitry configured to generate a stimulation cycle comprising N+1 electrical phases, wherein N is a group of electrodes of the plurality of electrodes equal to or larger than 3;
• wherein during N electrical phases of the cycle, the control circuitry causes each electrode of the group to deliver alternating a therapeutic electric phase and a number of N−1 charge balancing electric phases, wherein the therapeutic electric phase of one electrode has an amplitude specific to this electrode, and wherein during a time of one phase one electrode of the group delivers its specific therapeutic electric phase and the other electrodes of the group or of the plurality of electrodes deliver a charge balancing phase having a polarity being opposite to the polarity of the specific therapeutic electric phase delivered at the same time;
• and
• wherein during an additional electrical phase, the control circuitry causes each electrode of the plurality of electrodes to deliver an electrical phase with an amplitude that establishes charge neutrality for residual charge on each respective electrode accumulated during the N electrical phases.