公开(公告)号：US20240340003A1

公开(公告)日：2024-10-10

申请号：US18519665

申请日：2023-11-27

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Holger HAIPLIK ,  Peter TONGE

IPC: H03K17/687

CPC classification number: H03K17/687

Abstract: This application relates to methods and apparatus for switching control of semiconductor switches. In a switching circuit, a semiconductor switch is implemented as a composite switch having a plurality of switch elements, each having a respective gate electrode. A switch driver is configured to drive the gate electrodes of the switch elements to a first gate voltage over a duration of a first switch transition and is configured to enable drive of at least some of the gate electrodes of the plurality of semiconductor switch elements at different times in a temporal sequence during the first switch transition. The temporal sequence is configured to provide an average resistance of the composite switch over the duration of the first switch transition which is closer to a final composite switch resistance, compared to driving the gate electrodes of the switch elements at the same time as one another.

公开(公告)号：US20220038087A1

公开(公告)日：2022-02-03

申请号：US17226843

申请日：2021-04-09

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Tahir RASHID ,  Jonathan TAYLOR ,  Ross C. MORGAN ,  Holger HAIPLIK

IPC: H03K7/08

Abstract: The present disclosure relates to circuitry comprising: pulse-width modulation (PWM) circuitry configured to generate a PWM output signal; and monitoring circuitry configured to monitor a supply voltage to the PWM circuitry and to output a control signal for controlling operation of the PWM circuitry, wherein the control signal is based on the supply voltage.

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.

公开(公告)号：US20250070671A1

公开(公告)日：2025-02-27

申请号：US18946316

申请日：2024-11-13

Applicant: Cirrus Logic International Semiconductor Ltd.

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

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

Abstract: Current detection circuitry for generating an average inductor current signal indicative of an average inductor current during an operational cycle of power converter circuitry, the current detection circuitry comprising: circuitry for generating a peak inductor current signal indicative of a peak inductor current during the operational cycle; and circuitry for applying a ripple current estimate signal, indicative of an estimate of half of a ripple current in the power converter circuitry, to the peak inductor current signal to generate the average inductor current signal, wherein the ripple current is equal to a difference between the average inductor current and the peak inductor current.

公开(公告)号：US20240429821A1

公开(公告)日：2024-12-26

申请号：US18698674

申请日：2022-11-29

Applicant: Cirrus Logic International Semiconductor Ltd.

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

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

Abstract: Current detection circuitry for generating an average inductor current signal indicative of an average inductor current during an operational cycle of power converter circuitry, the current detection circuitry comprising: circuitry for generating a peak inductor current signal indicative of a peak inductor current during the operational cycle; and circuitry for applying a ripple current estimate signal, indicative of an estimate of half of a ripple current in the power converter circuitry, to the peak inductor current signal to generate the average inductor current signal, wherein the ripple current is equal to a difference between the average inductor current and the peak inductor current.