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US 10,897,201 B2Granted
Switched mode power supply signal reconstruction
AssigneeNXP B.V.
InventorHans Halberstadt
Life of this patent
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Abstract
A switched mode power supply including an alternating current power supply configured to output a voltage, a sense resistor configured to sense a voltage output from the power supply, a current sense processor configured to sense a current level through the sense resistor, sense disturbances in the sensed voltage, and reconstruct the sensed voltage to eliminate the disturbances.
Claims22
A switched mode power supply, comprising:
- an alternating current power supply configured to output a voltage;
- a sense resistor configured to sense a voltage in a power factor correction stage;
- a current sense processor configured to sense a current level through the sense resistor and reconstruct the sensed voltage to eliminate disturbances in the sensed voltage across the sense resistor, wherein the disturbances include voltage spikes in a rising and falling edge of the sensed voltage.
A method of reconstructing a power supply signal, comprising:
- outputting a power supply voltage;
- sensing a voltage in a power factor correction stage using a sense resistor;
- sensing a current level of the output voltage through the sense resistor and reconstructing the sensed voltage to eliminate disturbances in the sensed voltage across the sense resistor, wherein the disturbances include voltage spikes in a rising and falling edge of the sensed voltage.
A switched mode power supply, comprising:
- a Vmains power supply to generate a Vmains signal;
- a power factor correction stage to improve a quality of the Vmains signal;
- a Vmains processor configured to sense the Vmains signal, wherein the Vmains processor is configured to derive timing from the sensed Vmains signal and to produce a square wave signal based upon the derived timing;
- a first integrator to receive the square wave signal and output a first integrated signal;
- a second integrator configured to receive and integrate the first integrated signal and output a second integrated signal having a sinewave replacement of the sensed Vmains signal;
- wherein the Vmains processor includes a peak detector that detects an amplitude of the sensed Vmains signal;
- an error loop, the error loop including,
- the peak detector configured to compare the amplitude of the sensed Vmains signal to a peak value of the second integrated signal;
- and
- a regulator configured to adapt a parameter of the amplitude of the second integrated signal by multiplying the Vmains signal with an output of the regulator.
7 more elements
A switched mode power supply, comprising:
- an alternating current power supply configured to output a voltage;
- a sense resistor configured to sense a voltage in a power factor correction stage;
- a current sense processor configured to sense a current level through the sense resistor and reconstruct the sensed voltage to eliminate disturbances in the sensed voltage across the sense resistor wherein the current sense processor includes a reconstruction apparatus that is configured to input the sensed voltage having the disturbances and output a reconstructed voltage signal free of the disturbances;
- wherein the sensed voltage and the reconstructed voltage signal have an amplitude and frequency within a predetermined tolerance;
- wherein the reconstruction apparatus is configured to take the sensed voltage and the reconstructed voltage and determined a difference therebetween;
- and wherein the difference provides an error signal that is fed back and integrated in the reconstruction apparatus to update the reconstructed voltage.
3 more elements
A method of reconstructing a power supply signal, comprising:
- outputting a power supply voltage;
- sensing a voltage in a power factor correction stage using a sense resistor;
- sensing a current level of the output voltage through the sense resistor and reconstructing the sensed voltage to eliminate disturbances in the sensed voltage across the sense resistor;
- inputting the sensed voltage having the disturbances and outputting a reconstructed voltage signal free of the disturbances;
- wherein the sensed voltage and the reconstructed voltage signal have an amplitude and frequency within a predetermined tolerance;
- and creating a rising edge of the reconstruction voltage signal using a primary stroke circuit and creating a falling edge of the reconstruction voltage signal using a secondary stroke circuit.
3 more elements
Dependencies are inferred from the claim text.