Tracking energy consumption using a boost-buck technique

An electronic device comprising an energy tracking system, the energy tracking system comprising a boost block, 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 an 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 boost block comprises:
• a first inductor terminal connected to an input of the boost block;
• a second inductor terminal;
• a first switching element, the first switching element being connected to the second inductor terminal, to ground and to the control circuit;
• a first diode having a cathode and an anode wherein the anode is connected to the second inductor terminal and the cathode is connected to an output of the boost block;
• and
• a second switching element, the second switching element being connected to the second inductor terminal, to the output of the boost block and to the control circuit;
• wherein the at least one energy transfer block comprises:
• a third switching element, the third switching element being connected to the control circuit, and to the input of the at least one energy transfer block;
• a third inductor terminal connected to the third switching device;
• a fourth inductor terminal coupled to an output of the at least one energy transfer block;
• a second diode having a cathode and an anode wherein the anode is connected to ground and the cathode is connected to the third inductor terminal;
• and
• a fourth switching element, the fourth switching element being connected to the control circuit, to the cathode of the second diode and the anode of the second diode.