Patent ID: 9496789
Filing Date: 2016-11-15
CPC Classification: G09G,H02M

Claim Text:
1. A method of driving a Single Inductor Bipolar Output Buck-Boost, SIBOBB, clocked by a clock signal having a given clock cycle period, the SIBOBB having an input for receiving a first potential, first, second, third, and fourth power switches, at least one positive output outputting a positive output voltage substantially higher than the first potential, and at least one negative output outputting a negative output voltage, the method comprising during the given clock cycle period: generating a first control signal based on, at least, the positive output voltage and a positive reference voltage; generating a second control signal based on, at least, the negative output voltage and a negative reference voltage; initiating a charging phase of charging the SIBOBB based on the first control signal, wherein a first amount of energy to be accumulated by the SIBOBB during the charging phase controlled by a first duty cycle of the first control signal, wherein initiating a first phase of discharging a second amount of energy accumulated in the SIBOBB to the at least one of the positive output in a boost-type configuration of the SIBOBB and the negative output in a buck-type or boost-type configuration of the SIBOBB based on the first control signal and the second control signal, wherein the second amount of energy discharged by the SIBOBB being controlled by a second duty cycle of the second control signal, wherein wherein the charging phase is initiated before the discharging phase.