US Patent Application 17829090. SYSTEM AND METHOD FOR ESTIMATING A CURRENT IN AN INDUCTOR OF A POWER CONVERTER simplified abstract

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SYSTEM AND METHOD FOR ESTIMATING A CURRENT IN AN INDUCTOR OF A POWER CONVERTER

Organization Name

TEXAS INSTRUMENTS INCORPORATED

Inventor(s)

Isaac Cohen of Dix Hills NY (US)

SYSTEM AND METHOD FOR ESTIMATING A CURRENT IN AN INDUCTOR OF A POWER CONVERTER - A simplified explanation of the abstract

This abstract first appeared for US patent application 17829090 titled 'SYSTEM AND METHOD FOR ESTIMATING A CURRENT IN AN INDUCTOR OF A POWER CONVERTER

Simplified Explanation

The patent application describes a current estimating circuit that is used in electronic devices.

  • The circuit includes a resistor and a capacitor that work together to measure the current flowing through an inductor.
  • During the first part of a switching cycle, the voltage across the capacitor is proportional to the inductor current.
  • The circuit also includes a sense resistor that provides a sensed voltage during the second part of the switching cycle.
  • A switch is used to apply the sensed voltage to the capacitor, allowing it to provide the voltage measurement during the second part of the cycle.


Original Abstract Submitted

In an example, a current estimating circuit includes a current estimating resistor coupled in series with a current estimating capacitor. The current estimating resistor and the current estimating capacitor are configured to provide a voltage across the current estimating capacitor during a first portion of a switching cycle, in which the voltage across the current estimating capacitor is proportional to an inductor current that flows through an inductor. The current estimating circuit includes a sense resistor configured to provide a sensed voltage across the sense resistor during a second portion of the switching cycle. The current estimating circuit includes a switch configured to apply the sensed voltage to the current estimating capacitor to provide the voltage across the current estimating capacitor during the second portion of the switching cycle.

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