Control of multi-level supply stage

摘要

There is described a buck-boost converter comprising: a voltage source; an inductor, wherein a first terminal of the inductor is switchably connected to the voltage source; and a plurality of capacitors switchably connected to a second terminal of the inductor, wherein a respective plurality of output voltages are formed across the plurality of capacitors, further comprising: an error determination means, for determining an error in each of the plurality of voltages, an inner control loop adapted to switchably connect one of the plurality of capacitors to the second terminal of the inductor in dependence on the determined errors; and an outer control loop adapted to control switching between buck mode and boost mode in dependence upon the determined errors.

主权项

1. A voltage generation apparatus comprising: a voltage source; an inductor, wherein a first terminal of the inductor is switchably connected to the voltage source; and a plurality of capacitors switchably connected to a second terminal of the inductor, wherein a respective plurality of output voltages are formed across the plurality of capacitors, further comprising:
an error determination block which determines an error in each of the plurality of voltages, a mean error in dependence thereon, and an error deviation from the mean error for each of the plurality of output voltages; and a controller for switchably connecting one of the plurality of capacitors to the second terminal of the inductor in dependence on the plurality of error deviations.