公开(公告)号：US11881759B2

公开(公告)日：2024-01-23

申请号：US17888001

申请日：2022-08-15

Applicant: STMICROELECTRONICS S.r.l.

Inventor： Fabrizio Bognanni ,  Giovanni Caggegi ,  Giuseppe Cantone ,  Vincenzo Marano ,  Francesco Pulvirenti

IPC: H02M1/08 ,  H02M3/07 ,  H02M3/158 ,  H03K17/687

CPC classification number: H02M1/08 ,  H02M3/07 ,  H02M3/158 ,  H03K17/6872 ,  H03K2217/0081

Abstract: A circuit includes a current path and a negative bootstrap circuitry coupled to the current path. The current path is coupled between a floating voltage and a reference ground, and includes a current generator coupled through a resistor to the floating voltage at a first node of the current generator. The current generator is controlled by a pulse signal. The negative bootstrap circuitry includes a pump capacitor coupled to a second node of the current generator and to the reference ground. The pump capacitor is configured to provide a negative voltage at the second node of the current generator based on the pulse signal.

公开(公告)号：US12140982B2

公开(公告)日：2024-11-12

申请号：US17866701

申请日：2022-07-18

Applicant: STMicroelectronics S.r.l.

Inventor： Domenico Ragonese ,  Vincenzo Marano ,  Giuseppe Antonio Di Genova ,  Marco Minieri

IPC: G05F1/573

Abstract: Disclosed herein is a system including a power transistor having a first conduction terminal coupled to a supply node, a second conduction terminal coupled to an output node, and a control terminal controlled by a drive signal. The system further includes a driver configured to receive an input voltage from an external component and generate the drive signal based thereupon, and a sense circuit. The sense circuit is configured to, when the power transistor is powering a load coupled to the output node: detect whether the power transistor has entered an overload condition, and if so, determine a duration of time that the power transistor is in the overload condition; and assert a diagnostic signal in response to the duration of time being outside of a time window.

公开(公告)号：US11451130B2

公开(公告)日：2022-09-20

申请号：US17229554

申请日：2021-04-13

Applicant: STMICROELECTRONICS S.r.l.

Inventor： Fabrizio Bognanni ,  Giovanni Caggegi ,  Giuseppe Cantone ,  Vincenzo Marano ,  Francesco Pulvirenti

IPC: H02M1/08 ,  H02M3/07 ,  H02M3/158 ,  H03K17/687

Abstract: A circuit includes a current path and a negative bootstrap circuitry coupled to the current path. The current path is coupled between a floating voltage and a reference ground, and includes a current generator coupled through a resistor to the floating voltage at a first node of the current generator. The current generator is controlled by a pulse signal. The negative bootstrap circuitry includes a pump capacitor coupled to a second node of the current generator and to the reference ground. The pump capacitor is configured to provide a negative voltage at the second node of the current generator based on the pulse signal.

公开(公告)号：US12021476B2

公开(公告)日：2024-06-25

申请号：US17514832

申请日：2021-10-29

Applicant: STMicroelectronics S.r.l.

Inventor： Enrico Poli ,  Vincenzo Marano

IPC: H02P7/29

CPC classification number: H02P7/29

Abstract: A method and apparatus for adaptive rectification for preventing current inversion in motor windings are provided. In the method and apparatus, first and second half bridges of a plurality of half bridges are operated to synchronously rectify and permit passage of current, through the windings of the motor, in a first direction. A change of direction of the current from the first direction to a second direction opposite the first direction is detected. In response to detecting that the current changed direction to the second direction, the first and second half bridges of the plurality of half bridges are operated to quasi-synchronously rectify and block passage of the current through the windings in the second direction.