Cirrus Logic Inc.

Dialog Semiconductor Gmbh

Vivek Parasuram

Chanchal Gupta

Pietro Gallina

Siddharth Maru

John William Kesterson

Vijay Choudhary

Abhishek Ray

Manmeet Singh

Shashank Alevoor

Rosario Pagano

Techniques for measuring average inductor charging current in a switched-power circuit avoid incurring measurement delay or a requirement of a complex filter. An inductor charging current measurement circuit coupled to a power output stage of the switched-power circuit measures an average charging current in an inductor of the switched-power circuit using pair of capacitors to sample an output voltage of the power output stage at different cycle times of an inductor current waveform. The measurement circuit includes a switch that connects the pair of capacitors together to provide a measurement indicative of the average inductor charging current by sharing charge between the first capacitor and the second capacitor to provide the measurement voltage. The provided measurement voltage is indicative of an average of an estimated peak and an estimated valley of the inductor current waveform, which may be used to make determinations regarding a magnitude of the load current.

Average inductor charging current measurement in a switched-mode power supply using switched-capacitor charge sharing

A method may include, when in a low-power mode of a power converter, monitoring an output voltage of the power converter; comparing, with a single comparator, the output voltage to a first threshold voltage and cause the power converter to enter a magnetization phase of the low-power mode responsive to the output voltage falling below the first threshold voltage; and during the magnetization phase and a demagnetization phase of the low-power mode, comparing, with the single comparator, the output voltage to a second threshold voltage lower than the first threshold voltage and cause the power converter to enter the high-power mode responsive to the output voltage falling below the second threshold voltage.

Pulse frequency modulation regulation and exit scheme using single comparator for power converter

A power converter and method to detect a light load condition at an output of the power converter are presented. The power converter may have an inductor and a resistive element connected between an input of the power converter and an input of the inductor. The power converter may have a first chopping unit to generate a chopped voltage signal at an output of said first chopping unit, wherein the chopped voltage signal is generated by chopping an inductor voltage at the input of said inductor based on a duty cycle of the power converter. The power converter may have a reference current source, wherein the reference current source and a replica resistive element are arranged in series. The power converter may have a comparator unit to generate, based on the reference potential and based on the chopped voltage signal, a signal indicative of said light load condition.

Light load detector circuit for inductive DC-DC converter

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Tempe, AZ, United States of America

Vivek Parasuram