Patent ID: 9194896
Filing Date: 2015-11-24
Classification: G01R

Abstract:
1. An electronic device comprising an energy tracking system, the energy tracking system comprising at least one energy transfer block and a control circuit wherein the control circuit is configured to control switching of energy in the at least one energy transfer block in order to transfer energy from a primary voltage applied at an input of the energy tracking system into a secondary voltage at the output of the energy tracking system; wherein the control circuit comprises an ON-time and OFF-time generator, at least one control logic block and an accumulator wherein the at least one control logic block is coupled to receive a signal from the ON-time and OFF-time generator and to generate switching signals for the at least one energy transfer block in the form of ON-time pulses with a constant width ON-time, and wherein the accumulator is configured to collect the number of ON-time pulses for determining the consumed energy based on the number of ON-time pulses per time; wherein the at least one energy transfer block comprises: a first inductor having a first terminal and a second terminal wherein the first terminal is connected to an input of the at least one energy transfer block; a first switching element, the first switching element being connected to the control circuit, to ground and to the second terminal of the inductor; a first capacitor having a first terminal and a second terminal wherein the first terminal of the first capacitor is connected to the second terminal of the first inductor; and a second inductor having a first terminal and a second terminal wherein the first terminal of the second inductor is connected to the second terminal of the first capacitor and the second terminal of the second inductor is connected to ground.