Patent ID: 8294306

Claim:
A device for balancing voltages of capacitors in an electronic circuit, the device comprising: a chopper circuit including a chopper inductor, the chopper circuit measuring a first voltage of a first capacitor of the electronic circuit, a second voltage of a second capacitor of the electronic circuit, and an output current of the electronic circuit; and a chopper control unit receiving the output current and generating a signal representing charging of the chopper inductor based on the output current, the signal having a switching frequency and a duty cycle, the chopper control unit receiving the first voltage and the second voltage and detecting an imbalance between the first voltage and the second voltage based on a polarity of the output current, the chopper control unit controlling transfer of charge between the first capacitor and the second capacitor using the chopper inductor based on the imbalance between the first voltage and second voltage and based on the signal representing charging of the chopper inductor.