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    SWITCHING CIRCUIT, CORRESPONDING DEVICE AND METHOD
    3.
    发明公开
    SWITCHING CIRCUIT, CORRESPONDING DEVICE AND METHOD 审中-公开

    公开(公告)号：US20230412129A1

    公开(公告)日：2023-12-21

    申请号：US18206331

    申请日：2023-06-06

    Applicant: STMicroelectronics S.r.l.

    Inventor： Edoardo BOTTI ,  Francesco STILGENBAUER ,  Marco RAIMONDI ,  Elena CUSSOTTO

    IPC: H03F3/217

    CPC classification number: H03F3/2173 ,  H03F2200/03 ,  H03F2200/171 ,  H03F2200/351

    Abstract: A switching circuit includes first and second half bridges supplying an electrical load via filter networks. During alternate switching sequences a first transistor pair (high-side in one half bridge and low-side in the other half bridge) is switched to a non-conductive state, and a second transistor pair (high-side in the other half bridge and low-side in the one half bridge) is switched to a conductive state. A current flow line is provided by an inductance, a first switch and a second switch between outputs of the half bridges. In a medium-high power mode, the first and second switches are in the conductive state between switching the first pair of transistors to the non-conductive state and the second pair of transistors to the conductive state. In a low or quiescent power mode, switching the first and second switches to the conductive state is refrained due to application of a longer delay.

    METHOD OF REDUCING POWER DISSIPATION IN A SWITCHING AMPLIFIER AND CIRCUIT IMPLEMENTING SUCH METHOD
    4.
    发明申请
    METHOD OF REDUCING POWER DISSIPATION IN A SWITCHING AMPLIFIER AND CIRCUIT IMPLEMENTING SUCH METHOD 有权
    在切换放大器中减少功率消耗的方法和实现这种方法的电路

    公开(公告)号：US20150109055A1

    公开(公告)日：2015-04-23

    申请号：US14512704

    申请日：2014-10-13

    Applicant: STMICROELECTRONICS S.r.l.

    Inventor： Edoardo BOTTI

    IPC: H03F1/02 ,  H03F3/217

    CPC classification number: H03F1/0233 ,  H03F1/0205 ,  H03F3/2171 ,  H03F3/2173 ,  H03F2200/03 ,  H03F2200/171 ,  H03F2200/267 ,  H03F2200/351 ,  H03F2200/471

    Abstract: A method is for reducing power dissipation in a switching amplifier. The method may include comparing a load current with a ripple current and, if the load current is greater than the ripple current, then detecting a first potential value at a first output terminal of the switching amplifier, detecting a second potential value at a second output terminal of the switching amplifier, detecting a third potential value between first and the second terminals of a first capacitor, and coupling the first terminal of the first capacitor to one of the first output terminal and the second output terminal. The second terminal of the first capacitor may be coupled to a reference voltage, the first output terminal, or the second output terminal based upon whether the first potential value or the second potential value is equal to the third potential value.

    Abstract translation: 一种用于降低开关放大器功耗的方法。 该方法可以包括将负载电流与纹波电流进行比较，并且如果负载电流大于纹波电流，则检测开关放大器的第一输出端处的第一电位值，在第二输出端检测第二电位值 端子，检测第一电容器的第一和第二端子之间的第三电位值，并将第一电容器的第一端子耦合到第一输出端子和第二输出端子之一。 基于第一电位值或第二电位值是否等于第三电位值，第一电容器的第二端子可以耦合到参考电压，第一输出端子或第二输出端子。

    SWITCHING POWER STAGE CIRCUIT ARRANGEMENT WITH CYCLE-BY-CYCLE PROTECTION AGAINST OVER-CURRENTS AND CORRESPONDING SWITCHING METHOD
    5.
    发明公开
    SWITCHING POWER STAGE CIRCUIT ARRANGEMENT WITH CYCLE-BY-CYCLE PROTECTION AGAINST OVER-CURRENTS AND CORRESPONDING SWITCHING METHOD 审中-公开

    公开(公告)号：US20240014729A1

    公开(公告)日：2024-01-11

    申请号：US18214751

    申请日：2023-06-27

    Applicant: STMicroelectronics S.r.l.

    Inventor： Edoardo BOTTI ,  Giovanni GONANO ,  Marco RAIMONDI

    IPC: H02M1/32 ,  H02M3/157 ,  H02M1/00 ,  H03F3/217

    CPC classification number: H02M1/32 ,  H02M3/157 ,  H02M1/0009 ,  H03F3/217

    Abstract: A half bridge switching power stage includes high/low side switches driven in response to a cycle-by-cycle protected driving signal derived from a PWM signal. Signals indicative of detected over-currents at said high/low side switches are processed to output the cycle-by-cycle protected driving signal, when the signal indicative of the detected over-current indicates, during a time interval within which the high/low side switch is turned on, that current flowing in the turned on high/low side switch crosses a given threshold, as an inverted PWM signal by turning off the turned on high/low side switch, and otherwise outputting said cycle-by-cycle protected driving signal as a not inverted PWM signal. An anomaly detection circuit receives the signals indicative of the over-current and switches off both the high/low side switches when an anomaly is detected in a pattern of over-current events in the signals indicative of the over-current.

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