Patent ID: 9246348
Filing Date: 2016-01-26
CPC Classification: H02J

Claim Text:
1. A controller for controlling a switching converter of a power stage receiving current from an adapter in which the adapter also provides current to a load, wherein the switching converter switches current through an inductor and is operative in a buck mode for charging a battery and in a boost mode to boost voltage from a lower battery voltage to a higher load voltage for discharging the battery to the load, wherein the controller comprises: a current error system which compares the adapter current with a predetermined adapter current level and which develops a control signal indicative thereof; a modulator which develops at least one pulse control signal based on said control signal and which has an output for controlling switching of the switching converter in the buck and boost modes using said at least one pulse control signal; and a switch control system which controls said current error system and said modulator to operate the switching converter in the buck mode when the adapter current is less than or equal to said predetermined adapter current level, wherein said switch control system controls said current error system and said modulator to operate the switching converter in the boost mode when the adapter current exceeds said predetermined adapter current level, and wherein said switch control system controls said current error system and said modulator to operate the switching converter with discontinuous conduction of current through the inductor near a transition between the buck and boost modes.