公开(公告)号：US20240297498A1

公开(公告)日：2024-09-05

申请号：US18589808

申请日：2024-02-28

申请人： Lisa Dräxlmaier GmbH

发明人： Stefan HAGENAUER ,  Stefan HOFINGER

IPC分类号： H02H9/02 ,  B60L3/00 ,  H02H1/00

CPC分类号： H02H9/025 ,  B60L3/0084 ,  H02H1/0007

摘要： An electronic circuit for a battery-electric vehicle for the switching-off of semiconductor switches in the event of critical currents, the electronic circuit includes at least two semiconductor switches that are connectable in parallel with one another between an energy supply source and a load. The electronic circuit includes a control unit configured to detect a current flowing through the at least two semiconductor switches, and, based on reaching a critical current, to switch off the at least two semiconductor switches. The electronic circuit includes a delay circuit connected in parallel with the at least two semiconductor switches and is configured, in the event of a not-exactly-simultaneous switching-off of the at least two semiconductor switches, to absorb a part of the critical current that switches over from at least one first-switching-off semiconductor switch to another one of the at least two semiconductor switches.

公开(公告)号：US12074592B2

公开(公告)日：2024-08-27

申请号：US18154138

申请日：2023-01-13

申请人： ROHM Co., LTD.

发明人： Toru Takuma

IPC分类号： H03K17/082 ,  H02H9/02 ,  B60R16/02

CPC分类号： H03K17/0822 ,  H02H9/025 ,  B60R16/02

摘要： Disclosed herein is an overcurrent protection circuit configured to, upon detection of an output current that flows through a switch element reaching a first overcurrent limit value, reduce an overcurrent limit value for the output current from the first overcurrent limit value to a second overcurrent limit value smaller than the first overcurrent limit value.

公开(公告)号：US20240056069A1

公开(公告)日：2024-02-15

申请号：US17887153

申请日：2022-08-12

申请人： Hamilton Sundstrand Corporation

发明人： John Dickey

IPC分类号： H03K17/082 ,  G05F1/569 ,  H02H9/02

CPC分类号： H03K17/0822 ,  G05F1/569 ,  H02H9/025

摘要： A power system includes a field effect transistor (FET) with a first terminal, a gate terminal, and a third terminal. A Zener diode is connected in series between the first terminal of the FET and the gate terminal of the FET. The Zener diode is oriented to allow current through the Zener diode only if its voltage difference is at or over the Zener voltage of the Zener diode. A capacitor is connected in parallel with the Zener diode. The capacitor is configured to raise gate drive current of the FET during a rising edge of a lightning transient and thereby reduce voltage drop across the FET faster than the Zener diode can do on its own.

公开(公告)号：US11846654B2

公开(公告)日：2023-12-19

申请号：US17209662

申请日：2021-03-23

申请人： STMicroelectronics S.r.l.

发明人： Romeo Letor

IPC分类号： G01R31/58 ,  G01R19/00 ,  H02H1/00 ,  H02H9/02 ,  G01R19/17

CPC分类号： G01R31/58 ,  G01R19/003 ,  G01R19/17 ,  H02H1/0007 ,  H02H9/025

摘要： Described herein is a method including measuring a current in a wire, normalizing the measured current, and comparing the normalized measured current to a control curve. The control curve is a function of a series of normalized current magnitudes and reaction times for corresponding ones of that series of normalized current magnitudes. The method further includes limiting the current in the wire based upon the comparison. The reaction times for ones of the series of normalized current magnitudes are times at which current limitation would occur if the normalized current remained at an associated normalized current magnitude.

公开(公告)号：US20230378748A1

公开(公告)日：2023-11-23

申请号：US18246296

申请日：2021-07-30

申请人： INSPUR ELECTRONIC INFORMATION INDUSTRY CO., LTD.

发明人： Huijie YOU ,  Yan LI

IPC分类号： H02H9/00 ,  H02H9/02

CPC分类号： H02H9/001 ,  H02H9/025

摘要： The present disclosure discloses a soft-start protection circuit, comprising: a protection chip, a first switch tube, a second switch tube, a third switch tube, a fourth switch tube, a first capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor and a seventh resistor. In the soft-start protection circuit of the present disclosure, the voltage of a voltage input end and the control end voltage of the first switch tube may be monitored; therefore, when there is a change in the two voltages, correct turn-on and turn-off actions may be performed in the soft-start protection circuit, increasing the accuracy of protection and at the same time reducing the turn-on speed of switch tubes to a certain extent, thus effectively reducing the impact of an impulse current on components and systems. Correspondingly, the present disclosure further discloses a circuit protection integrated chip.

公开(公告)号：US11695268B2

公开(公告)日：2023-07-04

申请号：US17379158

申请日：2021-07-19

申请人： MINEBEA MITSUMI Inc.

发明人： Hiroyuki Kato ,  Toshikazu Koshiba

IPC分类号： H02P27/06 ,  H02H7/08 ,  H02H7/122 ,  H02H9/02 ,  H02M7/5387 ,  H02M3/07 ,  H02M1/32

CPC分类号： H02H7/0833 ,  H02H7/122 ,  H02H9/025 ,  H02M1/32 ,  H02M3/07 ,  H02M7/5387 ,  H02P27/06

摘要： A protection function of an electronic device is realized with a lower cost. A load drive circuit 102 includes: transistors Qa and Qb for protection of an N-channel type connected between a power source terminal P1 and a power source end P7 for driving; an inverter circuit 14 that drives a load based on an input drive control signal Sd, the inverter circuit 14 being disposed between the power source end P7 for driving and a ground potential; and a booster unit 16 including a capacitor C1 having one terminal connected to an output end of the inverter circuit 14, the booster unit 16 generating, across another terminal of the capacitor C1, a voltage exceeding a power source voltage Vdc, and applying the voltage to control electrodes of the transistors Qa and Qb for protection.

公开(公告)号：US20180358806A1

公开(公告)日：2018-12-13

申请号：US15778377

申请日：2016-12-21

申请人： AutoNetworks Technologies, Ltd. ,  Sumitomo Wiring Systems, Ltd. ,  SUMITOMO ELECTRIC INDUSTRIES, LTD.

发明人： Keisuke Mase ,  Yuuki Sugisawa ,  Kota Oda ,  Shunichi Sawano

IPC分类号： H02H9/02 ,  G05F1/573 ,  H02H3/24 ,  H02J7/00 ,  H03K17/082 ,  H03K17/18

CPC分类号： H02H9/025 ,  G05F1/56 ,  G05F1/573 ,  H02H3/243 ,  H02J7/0029 ,  H02J7/0063 ,  H02J2007/0039 ,  H03K17/0822 ,  H03K17/18

摘要： In a power supply control apparatus, a control circuit adjusts a resistance between a drain and a source of a semiconductor transistor by adjusting the voltage at a gate of the semiconductor transistor. After the control circuit has lowered the resistance between the drain and the source, a control portion determines whether or not the voltage at the source detected by a voltage detecting portion is larger than or equal to a standard voltage. If the voltage at the source is larger than or equal to the standard voltage, the control circuit again lowers the resistance between the drain and the source. If the voltage at the source is smaller than the standard voltage, the control circuit adjusts the resistance between the drain and the source to a resistance at the time when determination was performed or larger.

公开(公告)号：US20180175611A1

公开(公告)日：2018-06-21

申请号：US15835555

申请日：2017-12-08

申请人： FANUC CORPORATION

发明人： Jun OKAMOTO

IPC分类号： H02H9/00 ,  H02H5/04 ,  H02H1/00

CPC分类号： H02H9/001 ,  H02H1/0007 ,  H02H3/025 ,  H02H5/041 ,  H02H5/042 ,  H02H5/046 ,  H02H9/025

摘要： An inrush current prevention circuit includes: a voltage detection unit configured to detect a value of an input voltage applied by a power supply; a current detection unit configured to detect a value of an input current input from the power supply; a current limiting element configured to limit the input current; a voltage drop detection unit configured to detect a voltage drop in the power supply resulting from inrush currents using a detection voltage value detected by the voltage detection unit and a detection current value detected by the current detection unit; and a control unit configured to decrease a current limiting level of the current limiting element when the voltage drop detection unit detects the voltage drop.

公开(公告)号：US20180062384A1

公开(公告)日：2018-03-01

申请号：US15687889

申请日：2017-08-28

申请人： Robert Bosch GmbH

发明人： Francois Mothais ,  Gergely Galamb

IPC分类号： H02H7/18 ,  H01M10/42

CPC分类号： H02H7/18 ,  H01M10/4257 ,  H01M2010/4271 ,  H01M2220/20 ,  H02H7/222 ,  H02H9/025 ,  H02H9/041 ,  H02H9/042 ,  H02H9/043 ,  H03K17/08148 ,  H03K17/107 ,  H03K17/795 ,  H03K2217/0054 ,  H03K2217/0063 ,  H03K2217/0072 ,  Y10T307/406

摘要： A current interruption arrangement for a battery system. The current interruption arrangement includes at least one current interruption unit for interrupting an electrical current flow between a battery of the battery system and a load of the battery. The current interruption unit has at least one power semiconductor for interrupting and establishing the current flow between the battery and the load of the battery, and at least one surge arrester connected in parallel with the power semiconductor.

公开(公告)号：US20180013294A1

公开(公告)日：2018-01-11

申请号：US15207238

申请日：2016-07-11

申请人： Analog Devices, Inc.

发明人： Lawrence H. Edelson ,  Michael Daly ,  Marcus O'Sullivan

IPC分类号： H02J4/00 ,  H03M1/66

CPC分类号： H02J4/00 ,  H02H9/001 ,  H02H9/025 ,  H03K17/0822 ,  H03K17/162 ,  H03K2217/0027 ,  H03M1/66

摘要： In an example, a circuit for controlling at least two electronic switches in a parallel configuration between a power supply and a load. The circuit includes a control circuit to generate first and second control signals to control first and second electronic switches of the at least two electronic switches, and establish a conduction sequence of the first and second electronic switches using the first and second control signals. The circuit includes a detection circuit configured to detect a current flowing through a control terminal of the first electronic switch during a transition portion, wherein the circuit is configured to adjust the first control signal and establish the second portion of the conduction sequence in response to the detected current.