Switched capacitor converters for wireless power transfer

A wireless power transmitter comprising:

• first cascade of two or more inverter driver switched capacitor (IDSC) cells coupled between a DC input bus and an input of a first inverter;
• a second cascade of two or more IDSC cells coupled between the DC input bus and an input of a second inverter;
• and
• a wireless power transmitter coil having a first terminal coupled to an output of the first inverter and a second terminal coupled to an output of the second inverter;
• and
• control circuitry that:
• operates the first cascade of two or more IDSC cells in a series mode to cause the first and second inverters to produce a positive half cycle and in a parallel mode to cause the first and second inverters to produce a negative half cycle;
• and
• operates the second cascade of two or more IDSC cells in a series mode to cause the first and second inverters to produce a negative half cycle and in a parallel mode to cause the first and second inverters to produce a positive half cycle.