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Tracking energy consumption using a boost-buck technique

  • US 9,400,296 B2
  • Filed: 01/04/2016
  • Issued: 07/26/2016
  • Est. Priority Date: 05/01/2013
  • Status: Active Grant
First Claim
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1. 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 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 a number of ON-time pulses for determining consumed energy based on the number of ON-time pulses per time;

    wherein the boost block comprises;

    a first inductor having a first terminal and a second terminal wherein the first terminal is connected to an input of the boost block;

    a first switching element, the first switching element being connected to the second terminal of the first inductor, to ground and to the control circuit;

    a first diode having a cathode and an anode wherein the anode is connected to the second terminal of the first inductor and the cathode is connected to an output of the boost block;

    a second switching element, the second switching element being connected to the second terminal of the first inductor, to the output of the boost block and to the control circuit; and

    a capacitor having a first terminal and a second terminal, the first terminal being connected to the cathode of the first diode and the second terminal of the capacitor being connected to ground;

    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 second inductor having a first terminal and a second terminal wherein the first terminal is connected to the third switching device and 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 first terminal of the second inductor; 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.

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