Current detection circuit and current detection method

By adjusting the start measurement value in each cycle based on the previous cycle's measurement, the current measurement circuit in power converters addresses the issue of swinging currents, improving detection accuracy and regulation efficiency.

DE102023118449B4Active Publication Date: 2025-01-30INFINEON TECHNOLOGIES AG
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Patent Information

Application Number
DE102023118449
Authority / Receiving Office
DE · DE
Patent Type
Patents
Current Assignee / Owner
Filing Date
2023-07-12
Publication Date
2025-01-30
Estimated Expiration
2043-07-12

AI Technical Summary

Technical Problem

Conventional power converters experience issues with current measurement accuracy due to ringing or swinging of currents during switching operations, leading to delayed and inaccurate detection results, which affect voltage and current regulation.

Method used

A current measurement circuit that adjusts the start measurement value in each cycle based on the previous cycle's measured value, reducing swinging time by using a controller to set the initial measurement value based on a stored value from the previous cycle, thereby improving measurement accuracy.

Benefits of technology

This approach significantly reduces the swinging time and enhances the accuracy of current detection in power converters, ensuring timely and precise regulation of output voltage and current.

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Abstract

A method for measuring current in a conductor, a current measuring circuit, and a power converter with a current measuring circuit are disclosed. The method involves measuring a current (IL) in a conductor in successive measurement cycles using a current measuring circuit (2). Measuring the current (IL) in each measurement cycle includes setting a starting measurement value of the measuring circuit (2) based on a measurement obtained in a previous measurement cycle.
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Citation Information

Patent Citations

  • Cyclic current estimation of a switching controller

    DE102013212542A1

  • Step-down LED driver with an average-based control concept for automotive use

    DE102014003405A1