Tracking energy consumption using a boost technique
First Claim
1. An electronic device comprising an energy tracking system, the energy tracking system including an energy transfer circuit and a control circuit, the control circuit to control switching of energy in the energy transfer circuit 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;
- a compare circuit to compare the output of the energy tracking system to a reference, the compare circuit to generate an output signal based on the comparison;
the control circuit including an ON-time and OFF-time generator, control logic and an accumulator, the control logic responsive to a signal from the ON-time and OFF-time generator and to the output signal from the compare circuit to generate constant ON-time pulses with a constant width ON-time, the accumulator to collect the constant ON-time pulses to determine consumed energy based on a number of constant ON-time pulses per time,the energy transfer circuit including;
an inductor having a first terminal and a second terminal, the first terminal of the inductor connected to an input of the energy transfer circuit; and
a first switch connected to the control circuit, to ground, and to the second terminal of the inductor.
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Accused Products
Abstract
The invention relates to an apparatus and method for tracking energy consumption. An energy tracking system comprises at least one switching element, at least one inductor and a control block to keep the output voltage at a pre-selected level. The switching elements are configured to apply the source of energy to the inductors. The control block compares the output voltage of the energy tracking system to a reference value and controls the switching of the switched elements in order to transfer energy for the primary voltage into a secondary voltage at the output of the energy tracking system. The electronic device further comprises an ON-time and OFF-time generator and an accumulator wherein the control block is coupled to receive a signal from the ON-time and OFF-time generator and generates switching signals for the at least one switching element in the form of ON-time pulses with a constant width ON-time.
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Citations
15 Claims
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1. An electronic device comprising an energy tracking system, the energy tracking system including an energy transfer circuit and a control circuit, the control circuit to control switching of energy in the energy transfer circuit 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;
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a compare circuit to compare the output of the energy tracking system to a reference, the compare circuit to generate an output signal based on the comparison; the control circuit including an ON-time and OFF-time generator, control logic and an accumulator, the control logic responsive to a signal from the ON-time and OFF-time generator and to the output signal from the compare circuit to generate constant ON-time pulses with a constant width ON-time, the accumulator to collect the constant ON-time pulses to determine consumed energy based on a number of constant ON-time pulses per time, the energy transfer circuit including; an inductor having a first terminal and a second terminal, the first terminal of the inductor connected to an input of the energy transfer circuit; and a first switch connected to the control circuit, to ground, and to the second terminal of the inductor. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An electronic device comprising:
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an energy transfer circuit including; an input; an inductor; and a first switch to selectively connect a terminal of the inductor to ground; a capacitor coupled to the energy transfer circuit, the capacitor to accumulate energy output by the energy transfer circuit; and a control circuit to switch the first switch between an on state and an off state, the control circuit including; a compare circuit to compare a voltage of the capacitor to a reference, the compare circuit to generate an output signal based on the comparison; an ON/OFF generator to generate constant ON-time pulses with a constant width ON-time; control logic responsive to the output signal from the compare circuit to deliver the constant ON-time pulses to the first switch to control the energy output to the capacitor by the energy transfer circuit; and an accumulator to count a number of constant ON-time pulses, and to determine consumed energy based on the number of constant ON-time pulses. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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Specification