Patent ID: 9350246
Filing Date: 2016-05-24
CPC Classification: H02M,Y02B

Claim Text:
1. A buck-boost converter including a voltage generation apparatus comprising: a voltage source ( 110 ); an inductor ( 108 ), wherein a first terminal of the inductor is switchably connected to the voltage source; and a plurality of capacitors ( 202 ) switchably connected to a second terminal of the inductor, wherein a respective plurality of output voltages are formed across the plurality of capacitors ( 202 ), characterised by further comprising: an error determination block ( 302 ) 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 comprising a control loop ( 304 ) adapted to switchably connect one of the plurality of capacitors ( 202 ) to the second terminal of the inductor in dependence on the plurality of error deviations; and a control loop ( 306 ) adapted to control switching between a buck mode and a boost mode in dependence upon the mean error.