Block 508 detects an output current of the charge pump circuit. Block 510 operates the charge pump circuit based on the detected output current by controlling a reference current Iref through digiPOT and Vref of the comparators A1, A2, A3, A4 of each of the plurality of stages. In an embodiment, the controller increases the Vref of the comparator A1, A2, A3, A4 to increase the output current provided to the load. In another embodiment, the controller decreases the Vref of the comparator A1, A2, A3, A4 to decrease the output current provided to the load.

The technical effects and benefits include a simple design having fewer switching elements resulting in a reduction in switching losses and complexity in the control logic. The technical effects and benefits also include a reduced EMI effects due to charge pump topology as compared to inductive boost drive. The technical effects and benefits include efficient control of a multiple capacitor array configuration due to the simple charge pump design. The technical effects and benefits include less switches required than conventional charge pump designs.