公开(公告)号：EP4012866A1

公开(公告)日：2022-06-15

申请号：EP21210682.7

申请日：2021-11-26

Applicant: STMicroelectronics S.r.l.

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

IPC: H02H3/087

Abstract: A current absorption management circuit (10) for use in an electronic fuse, for instance, comprises a first node (VBAT+) and a second node (OUT) coupled to an electrical supply source (for instance a battery SS in a motor vehicle V) and an electrical load (L) supplied by the electrical supply source (SS) via an electronic switch (such as a power MOSFET transistor 12) having a control node). A third node (GD) of the circuit is coupled to the electronic switch (12) to switch the electronic switch (12) between a conductive state (1000), wherein the electrical load (L) is coupled to the supply source (SS) via the electronic switch (12), and a non-conductive state (1000A).
A secondary electronic switch (12A) is arranged intermediate the first node (VBAT+) and the second node (OFF) and control logic circuitry (20) is provided configured to operate alternately:
in a first (full ON) mode of operation (1000), wherein the electronic switch (12) is in a conductive state and the electrical load (L) is coupled to the supply source (SS) via the electronic switch (12), and the secondary electronic switch (12A) is in a non-conductive state, and
in a second (ON active-standby) mode of operation (1002), wherein the electronic switch (12) is in a non-conductive state and the secondary electronic switch (12A) is in a conductive state and the electrical load (L) is coupled to the supply source (SS) via the secondary electronic switch (12A).