Single-inductor multiple output (SIMO) switching power supply having offset common-mode voltage for operating a class-d audio amplifier

    公开(公告)号:US11552567B2

    公开(公告)日:2023-01-10

    申请号:US17218992

    申请日:2021-03-31

    IPC分类号: H02M3/158 H03F3/217 H02M1/00

    摘要: A single-inductor multiple output (SIMO) switched-power DC-DC converter for a class-D amplifier provides outputs that are symmetric about a common-mode input voltage of the amplifier, while remaining asymmetric about a return terminal of the amplifier and switching converter. The DC-DC converter includes an inductive element, a switching circuit that energizes the inductive element from an input source, and a control circuit that controls the switching circuit. The control circuit may have multiple switching modes, and in one of the multiple switching modes, the switching circuit may couple the inductive element between outputs of the converter so that stored energy produces a differential change between the voltages of the outputs. The control circuit may implement a first control loop that maintains a common mode voltage of the pair of outputs at a predetermined voltage independent of the individual voltages of the pair of outputs.

    LAYERED PROCESS-CONSTRUCTED DOUBLE-WINDING EMBEDDED SOLENOID INDUCTOR

    公开(公告)号:US20210287841A1

    公开(公告)日:2021-09-16

    申请号:US17173486

    申请日:2021-02-11

    IPC分类号: H01F27/28 H01F27/24 H01F17/00

    摘要: A method for constructing a solenoid inductor includes positioning an inner winding substantially around a magnetic core, positioning an outer winding substantially around the inner winding, and using a layered process to perform said positioning the inner and outer windings. The layered process includes processing a first conducting layer as a bottom layer of the outer winding, above processing a first dielectric layer, above processing a second conducting layer as a bottom layer of the inner winding, above processing a second dielectric layer, above processing a magnetic core layer, above processing a third dielectric layer, above processing a third conducting layer as a top layer of the inner winding, above processing a fourth dielectric layer, above processing a fourth conducting layer as a top layer of the outer winding, above processing a fifth dielectric layer, and the inner and outer windings are electrically connected.

    LAYERED PROCESS-CONSTRUCTED DOUBLE-WINDING EMBEDDED SOLENOID INDUCTOR

    公开(公告)号:US20240136105A1

    公开(公告)日:2024-04-25

    申请号:US18383816

    申请日:2023-10-25

    IPC分类号: H01F27/28 H01F17/00 H01F27/24

    摘要: A method for constructing a solenoid inductor of an IC package with active/passive devices includes positioning an inner winding substantially around a magnetic core, positioning an outer winding substantially around the inner winding, and using a layered process to perform positioning the inner and outer windings. The layered process includes processing a first conducting layer as a bottom layer of the outer winding, above processing a first dielectric layer, above processing a second conducting layer as a bottom layer of the inner winding, above processing a second dielectric layer, above processing a magnetic core layer, above processing a third dielectric layer, above processing a third conducting layer as a top layer of the inner winding, above processing a fourth dielectric layer, above processing a fourth conducting layer as a top layer of the outer winding, above processing a fifth dielectric layer, and the inner and outer windings are electrically connected.

    Layered process-constructed double-winding embedded solenoid inductor

    公开(公告)号:US11881343B2

    公开(公告)日:2024-01-23

    申请号:US17173486

    申请日:2021-02-11

    摘要: A method for constructing a solenoid inductor includes positioning an inner winding substantially around a magnetic core, positioning an outer winding substantially around the inner winding, and using a layered process to perform said positioning the inner and outer windings. The layered process includes processing a first conducting layer as a bottom layer of the outer winding, above processing a first dielectric layer, above processing a second conducting layer as a bottom layer of the inner winding, above processing a second dielectric layer, above processing a magnetic core layer, above processing a third dielectric layer, above processing a third conducting layer as a top layer of the inner winding, above processing a fourth dielectric layer, above processing a fourth conducting layer as a top layer of the outer winding, above processing a fifth dielectric layer, and the inner and outer windings are electrically connected.

    SINGLE-INDUCTOR MULTIPLE OUTPUT (SIMO) SWITCHING POWER SUPPLY HAVING OFFSET COMMON-MODE VOLTAGE FOR OPERATING A CLASS-D AUDIO AMPLIFIER

    公开(公告)号:US20220329155A1

    公开(公告)日:2022-10-13

    申请号:US17218992

    申请日:2021-03-31

    IPC分类号: H02M3/158 H02M1/00 H03F3/217

    摘要: A single-inductor multiple output (SIMO) switched-power DC-DC converter for a class-D amplifier provides outputs that are symmetric about a common-mode input voltage of the amplifier, while remaining asymmetric about a return terminal of the amplifier and switching converter. The DC-DC converter includes an inductive element, a switching circuit that energizes the inductive element from an input source, and a control circuit that controls the switching circuit. The control circuit may have multiple switching modes, and in one of the multiple switching modes, the switching circuit may couple the inductive element between outputs of the converter so that stored energy produces a differential change between the voltages of the outputs. The control circuit may implement a first control loop that maintains a common mode voltage of the pair of outputs at a predetermined voltage independent of the individual voltages of the pair of outputs.