公开(公告)号：US20230198396A1

公开(公告)日：2023-06-22

申请号：US17699269

申请日：2022-03-21

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： John B. BOWLERWELL ,  Alastair M. BOOMER ,  Holger HAIPLIK ,  Malcolm BLYTH

IPC: H02M3/158 ,  H02M1/00 ,  G01R27/26

CPC classification number: H02M3/158 ,  G01R27/2611 ,  H02M1/0009

Abstract: Circuitry for estimating an inductance of an inductor in power converter circuitry, the circuitry comprising: circuitry for generating a peak inductor current signal indicative of a peak inductor current during an operational cycle of the power converter circuitry; circuitry for generating a ripple current estimate signal, indicative of an estimate of a ripple current in the power converter circuitry; and circuitry for applying the ripple current estimate signal to the peak inductor current signal to generate an average inductor current threshold signal indicative of an estimated average inductor current in the power converter circuitry during the operational cycle, wherein the ripple current estimate signal is based on: a duration of a charging phase of operation of the power converter circuitry; a voltage across the inductor; and an inductance value for the inductor; and wherein the circuitry for generating the ripple current estimate signal is operative to select an inductance value for the inductor for which the estimated average inductor current is equal to an actual average inductor current during the operational cycle to generate a value for the actual inductance of the inductor.