公开(公告)号：US20230187922A1

公开(公告)日：2023-06-15

申请号：US18064861

申请日：2022-12-12

Applicant: STMICROELECTRONICS S.r.l. ,  STMICROELECTRONICS (ROUSSET) SAS

Inventor： Vincenzo RANDAZZO ,  Alberto MARZO ,  Giovanni SUSINNA ,  Vanni POLETTO ,  Antoine PAVLIN ,  CalogeroAndrea TRECARICHI ,  Mirko DONDINI ,  Roberto CRISAFULLI ,  Enrico CASTRO ,  Romeo LETOR

IPC: H02H3/08 ,  H02H1/00 ,  H03K17/687 ,  H03K19/20

CPC classification number: H02H3/08 ,  H02H1/0007 ,  H03K17/687 ,  H03K19/20

Abstract: Embodiments are directed to electronic fuse devices and systems. One such electronic fuse includes current sensing circuitry that senses a current in a conductor coupled between a power supply and a load, and generates a current sensing signal indicative of the sensed current. I2t circuitry receives the current sensing signal and determines whether the sensed current exceeds an I2t curve of the conductor. The electronic fuse further includes at least one of external MOSFET temperature sensing circuitry that senses a temperature of an external MOSFET coupled to the conductor, low current bypass circuitry that supplies a reduced current to the load in a low power consumption mode during which the external MOSFET is in a non-conductive state, or desaturation sensing circuitry that senses a drain-source voltage of the external MOSFET.

公开(公告)号：US20220190816A1

公开(公告)日：2022-06-16

申请号：US17545719

申请日：2021-12-08

Applicant: STMicroelectronics S.r.l.

Inventor： Enrico CASTRO ,  Giovanni SUSINNA ,  Vincenzo RANDAZZO ,  Mirko DONDINI ,  Calogero Andrea TRECARICHI

IPC: H03K17/082 ,  H02H9/02

Abstract: Current absorption management for an electronic fuse coupled between an electrical supply source node and an electrical load node selectively controls a high current electronic switch and a low current electronic switch coupled in parallel between the electrical supply source node and the electrical load node. The high current and low current electronic switches are alternatively actuated: in a first mode where the high current electronic switch is turned on and the low current electronic switch is turned off, and in a second mode where the high current electronic switch is turned off and the low current electronic switch is turned on. Change to the second mode may be made in response to a standby state or a sensing of a lower current in the electrical load. Conversely, change to the first mode may be made in response to a sensing of a higher current in the electrical load.