公开(公告)号：US20250038516A1

公开(公告)日：2025-01-30

申请号：US18360538

申请日：2023-07-27

Applicant: Rohm Co., Ltd.

Inventor： Mitchell G. Van Ochten

IPC: H02H3/087 ,  B60L3/04 ,  H01H47/00

Abstract: Systems and methods relating to battery disconnect units are disclosed. An example integrated circuit includes a first transistor operable for coupling to a first end of a coil of a DC contactor via a first pin, a second transistor operable for coupling to a second end of the coil of the DC contractor via a second pin, a third pin operable to receive an enable signal, wherein the second transistor is operable to be activated based on the enable signal and a timer operable to be activated based on the enable signal. The integrated circuit also includes circuitry operable to: in response to activating the second transistor, increase average current in the coil of the DC contactor to a first target level; in response to the timer indicating that a predetermined amount of time has elapsed, adjust the average current in the coil to a second target level, wherein the second target level is lower than the first target level; maintain an average current in the coil at the second target level until a disable signal is received via the third pin; and deactivate the second transistor in response to receiving the disable signal.