Patent ID: 8427121
Filing Date: 2013-04-23
Classification: H02M,Y02B

Abstract:
1. A method of controlling a dc-to-dc electric power supply circuit in which the current through an inductor is used to supply electric power to respective ones of a plurality of outputs during successive respective time periods, the method comprising: (i) in at least some of said time periods, (ii) during each said time period: wherein: in each of said time periods wherein a current correction step occurs, the first power supply step is subsequent to the current correction step; the level of current in the inductor at the end of the second power supply step is detected and stored; and the current correction step is a step in which the level of current in the inductor is altered in the direction to reduce the difference between the level of current in the inductor and the said stored level of current at the end of the second power supply step in the most recent previous said time period for the same output.